./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/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_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/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_604982f3-6346-4af9-868a-937e82f0b8b2/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 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:38,671 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:38,745 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:38,750 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:38,751 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:38,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:38,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:38,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:38,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:38,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:38,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:38,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:38,782 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:38,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:38,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:38,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:38,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:38,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:38,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:38,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:38,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:38,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:38,788 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:38,789 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:38,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:38,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:38,790 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:38,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:38,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:38,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:38,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:38,792 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:38,793 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:38,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:38,794 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:38,794 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:38,794 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:38,794 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:38,795 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:38,795 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_604982f3-6346-4af9-868a-937e82f0b8b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 [2023-11-06 23:03:39,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:39,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:39,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:39,168 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:39,172 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:39,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2023-11-06 23:03:42,296 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:42,549 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:42,550 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2023-11-06 23:03:42,559 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/data/5d2946a1c/1f2f466fce614704b98b6914f6b52843/FLAGe5a548f13 [2023-11-06 23:03:42,599 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/data/5d2946a1c/1f2f466fce614704b98b6914f6b52843 [2023-11-06 23:03:42,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:42,603 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:42,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:42,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:42,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:42,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:42,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191b6a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42, skipping insertion in model container [2023-11-06 23:03:42,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:42,644 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:42,841 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_604982f3-6346-4af9-868a-937e82f0b8b2/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2023-11-06 23:03:42,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:42,896 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:42,912 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_604982f3-6346-4af9-868a-937e82f0b8b2/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2023-11-06 23:03:42,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:42,970 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:42,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42 WrapperNode [2023-11-06 23:03:42,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:42,973 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:42,974 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:42,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:42,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:42,995 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,032 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 117 [2023-11-06 23:03:43,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:43,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:43,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:43,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:43,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,050 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,051 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:43,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:43,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:43,095 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:43,096 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (1/1) ... [2023-11-06 23:03:43,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:43,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:43,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:43,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:43,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:03:43,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:03:43,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:43,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:43,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:03:43,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 23:03:43,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 23:03:43,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:03:43,275 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:43,278 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:43,545 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:43,553 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:43,553 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-06 23:03:43,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:43 BoogieIcfgContainer [2023-11-06 23:03:43,556 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:43,559 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:43,559 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:43,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:43,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:42" (1/3) ... [2023-11-06 23:03:43,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b85ed9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:43, skipping insertion in model container [2023-11-06 23:03:43,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:42" (2/3) ... [2023-11-06 23:03:43,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b85ed9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:43, skipping insertion in model container [2023-11-06 23:03:43,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:43" (3/3) ... [2023-11-06 23:03:43,567 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2023-11-06 23:03:43,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:43,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:43,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:43,668 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;@8666c4f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:43,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:03:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 23:03:43,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:43,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:43,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:43,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:43,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2023-11-06 23:03:43,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:43,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587619487] [2023-11-06 23:03:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:43,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:43,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587619487] [2023-11-06 23:03:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587619487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:43,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:43,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:43,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566243265] [2023-11-06 23:03:43,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:43,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:43,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:44,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:03:44,062 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:44,116 INFO L93 Difference]: Finished difference Result 78 states and 121 transitions. [2023-11-06 23:03:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 23:03:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:44,127 INFO L225 Difference]: With dead ends: 78 [2023-11-06 23:03:44,128 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 23:03:44,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:03:44,135 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 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 23:03:44,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 23:03:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-06 23:03:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-11-06 23:03:44,179 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 12 [2023-11-06 23:03:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:44,179 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-11-06 23:03:44,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-11-06 23:03:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 23:03:44,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:44,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:44,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:03:44,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:44,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -326095532, now seen corresponding path program 1 times [2023-11-06 23:03:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:44,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388535941] [2023-11-06 23:03:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:44,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:44,320 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 23:03:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388535941] [2023-11-06 23:03:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388535941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970291126] [2023-11-06 23:03:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:44,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:44,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:44,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:03:44,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:44,441 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 23:03:44,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970291126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:44,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:44,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 23:03:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033635694] [2023-11-06 23:03:44,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:44,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:44,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:44,445 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:44,539 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2023-11-06 23:03:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 23:03:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:44,552 INFO L225 Difference]: With dead ends: 68 [2023-11-06 23:03:44,552 INFO L226 Difference]: Without dead ends: 55 [2023-11-06 23:03:44,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 23:03:44,555 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:44,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-06 23:03:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2023-11-06 23:03:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-11-06 23:03:44,566 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 14 [2023-11-06 23:03:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:44,566 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-11-06 23:03:44,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-11-06 23:03:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:03:44,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:44,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:44,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:44,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 23:03:44,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:44,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2023-11-06 23:03:44,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:44,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824977443] [2023-11-06 23:03:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:44,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:44,883 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 23:03:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824977443] [2023-11-06 23:03:44,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824977443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909373959] [2023-11-06 23:03:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:44,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:44,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:44,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:44,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:44,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:03:44,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:45,027 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 23:03:45,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:45,055 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 23:03:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909373959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:45,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:45,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 23:03:45,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796412173] [2023-11-06 23:03:45,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:45,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:45,060 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:45,092 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2023-11-06 23:03:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 23:03:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:45,094 INFO L225 Difference]: With dead ends: 77 [2023-11-06 23:03:45,094 INFO L226 Difference]: Without dead ends: 44 [2023-11-06 23:03:45,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:45,097 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 87 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 23:03:45,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 87 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-06 23:03:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-06 23:03:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-11-06 23:03:45,112 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 16 [2023-11-06 23:03:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:45,113 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-11-06 23:03:45,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-11-06 23:03:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 23:03:45,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:45,115 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:45,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:45,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 23:03:45,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:45,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1414516411, now seen corresponding path program 2 times [2023-11-06 23:03:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:45,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270847392] [2023-11-06 23:03:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:45,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:45,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270847392] [2023-11-06 23:03:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270847392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:45,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:45,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:45,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143180864] [2023-11-06 23:03:45,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:45,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:45,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:45,429 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:45,496 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2023-11-06 23:03:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-06 23:03:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:45,498 INFO L225 Difference]: With dead ends: 95 [2023-11-06 23:03:45,498 INFO L226 Difference]: Without dead ends: 64 [2023-11-06 23:03:45,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:45,500 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:45,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-06 23:03:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2023-11-06 23:03:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-11-06 23:03:45,510 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 22 [2023-11-06 23:03:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:45,511 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-06 23:03:45,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-11-06 23:03:45,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 23:03:45,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:45,512 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:45,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:03:45,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:45,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2023-11-06 23:03:45,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:45,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099839926] [2023-11-06 23:03:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:45,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-06 23:03:45,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:45,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099839926] [2023-11-06 23:03:45,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099839926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:45,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:45,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:45,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785192095] [2023-11-06 23:03:45,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:45,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:45,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:45,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:45,665 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:45,720 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2023-11-06 23:03:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:45,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 23:03:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:45,722 INFO L225 Difference]: With dead ends: 92 [2023-11-06 23:03:45,722 INFO L226 Difference]: Without dead ends: 61 [2023-11-06 23:03:45,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:45,723 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:45,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-06 23:03:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-11-06 23:03:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-11-06 23:03:45,733 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2023-11-06 23:03:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:45,734 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-11-06 23:03:45,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-11-06 23:03:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 23:03:45,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:45,735 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:03:45,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:45,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash -581508620, now seen corresponding path program 1 times [2023-11-06 23:03:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:45,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374754892] [2023-11-06 23:03:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374754892] [2023-11-06 23:03:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374754892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:45,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244390627] [2023-11-06 23:03:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:45,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:45,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:45,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:45,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:03:45,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:46,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:46,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244390627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:46,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:46,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 23:03:46,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340289138] [2023-11-06 23:03:46,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:46,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:03:46,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:03:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:03:46,121 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:46,191 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2023-11-06 23:03:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:03:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-06 23:03:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:46,195 INFO L225 Difference]: With dead ends: 107 [2023-11-06 23:03:46,195 INFO L226 Difference]: Without dead ends: 65 [2023-11-06 23:03:46,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:03:46,200 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:46,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-06 23:03:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-06 23:03:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-11-06 23:03:46,232 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 26 [2023-11-06 23:03:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:46,232 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-11-06 23:03:46,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-11-06 23:03:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 23:03:46,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:46,236 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:46,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:03:46,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:46,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:46,443 INFO L85 PathProgramCache]: Analyzing trace with hash -772621952, now seen corresponding path program 2 times [2023-11-06 23:03:46,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:46,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132158824] [2023-11-06 23:03:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:46,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:46,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:46,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132158824] [2023-11-06 23:03:46,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132158824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:46,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313901469] [2023-11-06 23:03:46,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:46,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:46,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:46,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:46,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:03:46,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:03:46,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:46,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:03:46,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:46,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:03:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-06 23:03:47,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:47,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313901469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:47,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:47,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-06 23:03:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841716630] [2023-11-06 23:03:47,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:47,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:03:47,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:03:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:03:47,006 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:47,151 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2023-11-06 23:03:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:03:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-06 23:03:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:47,154 INFO L225 Difference]: With dead ends: 79 [2023-11-06 23:03:47,154 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 23:03:47,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:03:47,156 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:47,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 160 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 23:03:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2023-11-06 23:03:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:03:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2023-11-06 23:03:47,180 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2023-11-06 23:03:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:47,181 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2023-11-06 23:03:47,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2023-11-06 23:03:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 23:03:47,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:47,183 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:47,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:47,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:47,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:47,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:47,389 INFO L85 PathProgramCache]: Analyzing trace with hash -602796711, now seen corresponding path program 1 times [2023-11-06 23:03:47,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:47,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128605208] [2023-11-06 23:03:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:47,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-06 23:03:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128605208] [2023-11-06 23:03:47,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128605208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:47,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109835312] [2023-11-06 23:03:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:47,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:47,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:47,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:03:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:47,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:03:47,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:03:47,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:48,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109835312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:48,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:48,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-06 23:03:48,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140333987] [2023-11-06 23:03:48,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:48,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:48,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:48,224 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:03:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:48,336 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2023-11-06 23:03:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:03:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-11-06 23:03:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:48,345 INFO L225 Difference]: With dead ends: 141 [2023-11-06 23:03:48,345 INFO L226 Difference]: Without dead ends: 94 [2023-11-06 23:03:48,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 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 23:03:48,348 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:48,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 171 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:48,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-06 23:03:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-06 23:03:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:03:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2023-11-06 23:03:48,377 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 46 [2023-11-06 23:03:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:48,377 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2023-11-06 23:03:48,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:03:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2023-11-06 23:03:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-06 23:03:48,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:48,381 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:48,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:48,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:48,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:48,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1736618383, now seen corresponding path program 2 times [2023-11-06 23:03:48,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:48,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485858120] [2023-11-06 23:03:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:49,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-06 23:03:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:49,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485858120] [2023-11-06 23:03:49,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485858120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:49,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236856029] [2023-11-06 23:03:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:49,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:49,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:49,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:03:49,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:49,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:49,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:03:49,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:03:49,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:50,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236856029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:50,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:50,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-06 23:03:50,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965719337] [2023-11-06 23:03:50,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:50,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 23:03:50,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 23:03:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:03:50,588 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:03:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:50,805 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2023-11-06 23:03:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:03:50,806 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2023-11-06 23:03:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:50,808 INFO L225 Difference]: With dead ends: 189 [2023-11-06 23:03:50,808 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 23:03:50,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:03:50,812 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:50,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 255 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 23:03:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-06 23:03:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 136 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:03:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2023-11-06 23:03:50,832 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 70 [2023-11-06 23:03:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:50,834 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2023-11-06 23:03:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:03:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2023-11-06 23:03:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-06 23:03:50,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:50,845 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:50,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:51,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:51,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:51,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:51,051 INFO L85 PathProgramCache]: Analyzing trace with hash 728266913, now seen corresponding path program 3 times [2023-11-06 23:03:51,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:51,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312532469] [2023-11-06 23:03:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:51,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:53,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-11-06 23:03:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:53,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312532469] [2023-11-06 23:03:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312532469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374715588] [2023-11-06 23:03:53,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:53,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:53,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:53,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:53,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:03:53,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:03:53,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:53,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:03:53,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2023-11-06 23:03:53,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2023-11-06 23:03:54,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374715588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:54,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:54,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2023-11-06 23:03:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382925101] [2023-11-06 23:03:54,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 23:03:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:54,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 23:03:54,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 23:03:54,059 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:03:54,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:54,378 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2023-11-06 23:03:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 23:03:54,379 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2023-11-06 23:03:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:54,382 INFO L225 Difference]: With dead ends: 218 [2023-11-06 23:03:54,382 INFO L226 Difference]: Without dead ends: 171 [2023-11-06 23:03:54,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 23:03:54,401 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:54,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 329 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-06 23:03:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2023-11-06 23:03:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 146 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:03:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2023-11-06 23:03:54,422 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 118 [2023-11-06 23:03:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:54,424 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2023-11-06 23:03:54,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:03:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2023-11-06 23:03:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-06 23:03:54,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:54,427 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:54,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:54,628 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:54,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash -870454239, now seen corresponding path program 1 times [2023-11-06 23:03:54,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:54,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298413973] [2023-11-06 23:03:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:57,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-11-06 23:03:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:57,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298413973] [2023-11-06 23:03:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298413973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92253625] [2023-11-06 23:03:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:57,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:57,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:57,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:57,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:03:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:57,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 23:03:57,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:03:57,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:00,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92253625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:00,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:00,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-11-06 23:04:00,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433829016] [2023-11-06 23:04:00,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:00,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-11-06 23:04:00,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-11-06 23:04:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-11-06 23:04:00,996 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:04:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:01,439 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2023-11-06 23:04:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-06 23:04:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2023-11-06 23:04:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:01,442 INFO L225 Difference]: With dead ends: 305 [2023-11-06 23:04:01,442 INFO L226 Difference]: Without dead ends: 250 [2023-11-06 23:04:01,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-11-06 23:04:01,447 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:01,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:04:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-06 23:04:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2023-11-06 23:04:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 243 states have (on average 1.0699588477366255) internal successors, (260), 244 states have internal predecessors, (260), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:04:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 268 transitions. [2023-11-06 23:04:01,488 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 268 transitions. Word has length 120 [2023-11-06 23:04:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:01,489 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 268 transitions. [2023-11-06 23:04:01,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:04:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 268 transitions. [2023-11-06 23:04:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-06 23:04:01,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:01,495 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:01,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:01,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:04:01,702 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:01,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1106180221, now seen corresponding path program 2 times [2023-11-06 23:04:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:01,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088374454] [2023-11-06 23:04:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:09,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2023-11-06 23:04:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:09,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:09,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088374454] [2023-11-06 23:04:09,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088374454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394288662] [2023-11-06 23:04:09,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:04:09,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:09,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:09,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:09,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:04:10,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:10,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:10,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-06 23:04:10,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:04:10,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:22,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394288662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:22,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:22,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2023-11-06 23:04:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429401952] [2023-11-06 23:04:22,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:22,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-11-06 23:04:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:22,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-11-06 23:04:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-11-06 23:04:22,449 INFO L87 Difference]: Start difference. First operand 250 states and 268 transitions. Second operand has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:04:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:23,617 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2023-11-06 23:04:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-11-06 23:04:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2023-11-06 23:04:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:23,622 INFO L225 Difference]: With dead ends: 501 [2023-11-06 23:04:23,622 INFO L226 Difference]: Without dead ends: 446 [2023-11-06 23:04:23,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-11-06 23:04:23,627 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:23,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 171 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-06 23:04:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-11-06 23:04:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 439 states have (on average 1.0387243735763099) internal successors, (456), 440 states have internal predecessors, (456), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:04:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 464 transitions. [2023-11-06 23:04:23,657 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 464 transitions. Word has length 218 [2023-11-06 23:04:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:23,658 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 464 transitions. [2023-11-06 23:04:23,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:04:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 464 transitions. [2023-11-06 23:04:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-11-06 23:04:23,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:23,667 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:23,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 23:04:23,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:04:23,874 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:23,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1565186873, now seen corresponding path program 3 times [2023-11-06 23:04:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054544076] [2023-11-06 23:04:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:52,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2023-11-06 23:04:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 37636 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:52,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054544076] [2023-11-06 23:04:52,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054544076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37994339] [2023-11-06 23:04:52,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:04:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:52,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:52,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:04:52,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:04:52,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:52,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:04:52,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37640 trivial. 0 not checked. [2023-11-06 23:04:53,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 37638 trivial. 0 not checked. [2023-11-06 23:04:53,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37994339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:53,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:53,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2023-11-06 23:04:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336305249] [2023-11-06 23:04:53,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:53,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-06 23:04:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:53,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-06 23:04:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2023-11-06 23:04:53,651 INFO L87 Difference]: Start difference. First operand 446 states and 464 transitions. Second operand has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:05:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:14,345 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2023-11-06 23:05:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2023-11-06 23:05:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 414 [2023-11-06 23:05:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:14,350 INFO L225 Difference]: With dead ends: 554 [2023-11-06 23:05:14,351 INFO L226 Difference]: Without dead ends: 499 [2023-11-06 23:05:14,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2023-11-06 23:05:14,369 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 888 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:14,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 218 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:05:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-06 23:05:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2023-11-06 23:05:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 469 states have (on average 1.0511727078891258) internal successors, (493), 470 states have internal predecessors, (493), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 23:05:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 503 transitions. [2023-11-06 23:05:14,407 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 503 transitions. Word has length 414 [2023-11-06 23:05:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:14,408 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 503 transitions. [2023-11-06 23:05:14,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:05:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 503 transitions. [2023-11-06 23:05:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-11-06 23:05:14,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:14,418 INFO L195 NwaCegarLoop]: trace histogram [195, 195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:14,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:14,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:05:14,625 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:14,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1055751507, now seen corresponding path program 4 times [2023-11-06 23:05:14,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:14,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599111066] [2023-11-06 23:05:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:14,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:43,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2023-11-06 23:05:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 23:05:43,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:43,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599111066] [2023-11-06 23:05:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599111066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465536404] [2023-11-06 23:05:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:05:43,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:43,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:43,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:05:43,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:05:43,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:43,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 197 conjunts are in the unsatisfiable core [2023-11-06 23:05:43,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 0 proven. 38025 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 23:05:44,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 23:06:35,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465536404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:35,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:35,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198, 198] total 395 [2023-11-06 23:06:35,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285258115] [2023-11-06 23:06:35,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:35,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-11-06 23:06:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-11-06 23:06:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-11-06 23:06:35,532 INFO L87 Difference]: Start difference. First operand 477 states and 503 transitions. Second operand has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:06:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:41,247 INFO L93 Difference]: Finished difference Result 955 states and 1203 transitions. [2023-11-06 23:06:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-11-06 23:06:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 425 [2023-11-06 23:06:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:41,253 INFO L225 Difference]: With dead ends: 955 [2023-11-06 23:06:41,254 INFO L226 Difference]: Without dead ends: 871 [2023-11-06 23:06:41,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-11-06 23:06:41,263 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:41,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 549 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:06:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-11-06 23:06:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2023-11-06 23:06:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 863 states have (on average 1.0278099652375434) internal successors, (887), 864 states have internal predecessors, (887), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 23:06:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 897 transitions. [2023-11-06 23:06:41,321 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 897 transitions. Word has length 425 [2023-11-06 23:06:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:41,322 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 897 transitions. [2023-11-06 23:06:41,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:06:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 897 transitions. [2023-11-06 23:06:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2023-11-06 23:06:41,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:41,332 INFO L195 NwaCegarLoop]: trace histogram [392, 392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:41,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:41,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604982f3-6346-4af9-868a-937e82f0b8b2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:06:41,544 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:41,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2116101367, now seen corresponding path program 5 times [2023-11-06 23:06:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:41,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610973710] [2023-11-06 23:06:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat