./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/calendar.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_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/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_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/calendar.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/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_500b58ff-0d9e-4d73-9339-8721a7b9d930/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 fe08ef78ee5c945bc38e9e915e26405aefe9ffb2d4911c91347e07e6a879dcd5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:00:11,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:00:11,775 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:00:11,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:00:11,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:00:11,827 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:00:11,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:00:11,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:00:11,835 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:00:11,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:00:11,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:00:11,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:00:11,845 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:00:11,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:00:11,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:00:11,849 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:00:11,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:00:11,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:00:11,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:00:11,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:00:11,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:00:11,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:00:11,853 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:00:11,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:00:11,855 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:00:11,856 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:00:11,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:00:11,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:00:11,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:11,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:00:11,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:00:11,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:00:11,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:00:11,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:00:11,862 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:00:11,863 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:00:11,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:00:11,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:00:11,864 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:00:11,864 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_500b58ff-0d9e-4d73-9339-8721a7b9d930/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe08ef78ee5c945bc38e9e915e26405aefe9ffb2d4911c91347e07e6a879dcd5 [2023-11-06 22:00:12,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:00:12,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:00:12,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:00:12,349 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:00:12,349 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:00:12,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/heap-data/calendar.i [2023-11-06 22:00:16,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:00:16,665 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:00:16,669 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/sv-benchmarks/c/heap-data/calendar.i [2023-11-06 22:00:16,690 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/data/3b8d64d71/6ad183082cdc4b65ab8d3405effd5aa5/FLAGb4cca8685 [2023-11-06 22:00:16,715 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/data/3b8d64d71/6ad183082cdc4b65ab8d3405effd5aa5 [2023-11-06 22:00:16,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:00:16,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:00:16,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:16,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:00:16,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:00:16,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:16" (1/1) ... [2023-11-06 22:00:16,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d20979d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:16, skipping insertion in model container [2023-11-06 22:00:16,741 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:16" (1/1) ... [2023-11-06 22:00:16,814 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:00:17,260 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_500b58ff-0d9e-4d73-9339-8721a7b9d930/sv-benchmarks/c/heap-data/calendar.i[23742,23755] [2023-11-06 22:00:17,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:17,285 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:00:17,336 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_500b58ff-0d9e-4d73-9339-8721a7b9d930/sv-benchmarks/c/heap-data/calendar.i[23742,23755] [2023-11-06 22:00:17,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:17,378 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:00:17,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17 WrapperNode [2023-11-06 22:00:17,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:17,381 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:17,381 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:00:17,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:00:17,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,422 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,448 INFO L138 Inliner]: procedures = 121, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2023-11-06 22:00:17,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:17,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:00:17,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:00:17,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:00:17,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:00:17,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:00:17,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:00:17,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:00:17,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:17,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:00:17,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:00:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:00:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:00:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:00:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:00:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:00:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:00:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:00:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:00:17,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:00:17,774 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:00:17,777 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:00:17,988 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:00:17,996 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:00:17,996 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:00:17,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:17 BoogieIcfgContainer [2023-11-06 22:00:17,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:00:18,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:00:18,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:00:18,007 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:00:18,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:00:16" (1/3) ... [2023-11-06 22:00:18,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ee96cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:18, skipping insertion in model container [2023-11-06 22:00:18,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17" (2/3) ... [2023-11-06 22:00:18,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ee96cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:18, skipping insertion in model container [2023-11-06 22:00:18,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:17" (3/3) ... [2023-11-06 22:00:18,016 INFO L112 eAbstractionObserver]: Analyzing ICFG calendar.i [2023-11-06 22:00:18,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:00:18,041 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:00:18,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:00:18,111 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;@2e9d2cb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:00:18,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:00:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:18,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:00:18,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:18,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:18,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:18,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash 399551724, now seen corresponding path program 1 times [2023-11-06 22:00:18,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:18,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256634432] [2023-11-06 22:00:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:18,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:18,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256634432] [2023-11-06 22:00:18,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256634432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:18,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:18,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:00:18,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458538458] [2023-11-06 22:00:18,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:18,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:00:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:00:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:18,469 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:18,494 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-11-06 22:00:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:00:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:00:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:18,507 INFO L225 Difference]: With dead ends: 35 [2023-11-06 22:00:18,507 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:00:18,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:18,516 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:18,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:00:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:00:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 22:00:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-06 22:00:18,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2023-11-06 22:00:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:18,562 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-06 22:00:18,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-06 22:00:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:00:18,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:18,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:18,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:00:18,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:18,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1946762309, now seen corresponding path program 1 times [2023-11-06 22:00:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697683220] [2023-11-06 22:00:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:18,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:18,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697683220] [2023-11-06 22:00:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697683220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:18,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:18,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:00:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474927552] [2023-11-06 22:00:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:18,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:18,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:18,809 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:18,880 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-06 22:00:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:00:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 22:00:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:18,935 INFO L225 Difference]: With dead ends: 35 [2023-11-06 22:00:18,935 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 22:00:18,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:18,938 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:18,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:00:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 22:00:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 22:00:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-11-06 22:00:18,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2023-11-06 22:00:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:18,990 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-11-06 22:00:18,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-11-06 22:00:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 22:00:18,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:18,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:18,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:00:18,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:18,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1070818203, now seen corresponding path program 1 times [2023-11-06 22:00:18,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:18,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26089431] [2023-11-06 22:00:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:20,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26089431] [2023-11-06 22:00:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26089431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:20,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:20,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:00:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918161430] [2023-11-06 22:00:20,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:20,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:00:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:00:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:00:20,102 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:20,885 INFO L93 Difference]: Finished difference Result 78 states and 105 transitions. [2023-11-06 22:00:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:00:20,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 22:00:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:20,892 INFO L225 Difference]: With dead ends: 78 [2023-11-06 22:00:20,892 INFO L226 Difference]: Without dead ends: 68 [2023-11-06 22:00:20,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:00:20,903 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:20,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 157 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:00:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-06 22:00:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 27. [2023-11-06 22:00:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-11-06 22:00:20,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2023-11-06 22:00:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:20,924 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-11-06 22:00:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-11-06 22:00:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:00:20,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:20,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:00:20,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:20,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1737463723, now seen corresponding path program 1 times [2023-11-06 22:00:20,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149926356] [2023-11-06 22:00:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:00:21,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149926356] [2023-11-06 22:00:21,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149926356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:21,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:21,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:00:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505276052] [2023-11-06 22:00:21,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:21,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:00:21,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:00:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:21,088 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:21,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:21,180 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-11-06 22:00:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:00:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:00:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:21,183 INFO L225 Difference]: With dead ends: 50 [2023-11-06 22:00:21,183 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:00:21,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:00:21,186 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:21,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:00:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2023-11-06 22:00:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-06 22:00:21,196 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-11-06 22:00:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:21,196 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-06 22:00:21,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-06 22:00:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:00:21,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:21,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:21,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:00:21,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:21,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1737523305, now seen corresponding path program 1 times [2023-11-06 22:00:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:21,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747544701] [2023-11-06 22:00:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:21,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:00:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:21,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747544701] [2023-11-06 22:00:21,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747544701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:21,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:21,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:00:21,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755361311] [2023-11-06 22:00:21,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:21,268 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:21,298 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-06 22:00:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:00:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:00:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:21,300 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:00:21,300 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 22:00:21,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:21,302 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:21,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:00:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 22:00:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-06 22:00:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-11-06 22:00:21,311 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2023-11-06 22:00:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:21,311 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-11-06 22:00:21,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-11-06 22:00:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:00:21,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:21,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:21,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:00:21,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:21,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash -782496211, now seen corresponding path program 1 times [2023-11-06 22:00:21,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:21,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502713942] [2023-11-06 22:00:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:21,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:21,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502713942] [2023-11-06 22:00:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502713942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:21,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:21,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:00:21,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133753920] [2023-11-06 22:00:21,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:00:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:21,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:00:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:00:21,690 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:22,259 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2023-11-06 22:00:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:00:22,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:00:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:22,262 INFO L225 Difference]: With dead ends: 76 [2023-11-06 22:00:22,262 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 22:00:22,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:00:22,264 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:22,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 146 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:00:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 22:00:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 35. [2023-11-06 22:00:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-11-06 22:00:22,276 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 19 [2023-11-06 22:00:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:22,276 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-11-06 22:00:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-11-06 22:00:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 22:00:22,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:22,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:22,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:00:22,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:22,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 830966801, now seen corresponding path program 1 times [2023-11-06 22:00:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463315580] [2023-11-06 22:00:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:22,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:22,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463315580] [2023-11-06 22:00:22,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463315580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:22,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36604261] [2023-11-06 22:00:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:22,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:22,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:22,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:00:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:22,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:00:22,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:22,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:22,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:23,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36604261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:23,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:00:23,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-06 22:00:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968710197] [2023-11-06 22:00:23,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:00:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:23,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:00:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:00:23,225 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:23,373 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2023-11-06 22:00:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:00:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 22:00:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:23,375 INFO L225 Difference]: With dead ends: 68 [2023-11-06 22:00:23,376 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 22:00:23,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:00:23,377 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:23,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 125 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 22:00:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-06 22:00:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2023-11-06 22:00:23,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 25 [2023-11-06 22:00:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:23,390 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2023-11-06 22:00:23,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2023-11-06 22:00:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:00:23,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:23,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:23,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:23,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:00:23,600 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:23,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1524144039, now seen corresponding path program 2 times [2023-11-06 22:00:23,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:23,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69301372] [2023-11-06 22:00:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:24,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69301372] [2023-11-06 22:00:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69301372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:24,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744214987] [2023-11-06 22:00:24,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:00:24,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:24,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:24,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:00:24,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:00:24,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:00:24,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:00:24,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:24,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-11-06 22:00:24,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:00:25,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:25,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:00:25,057 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 22:00:25,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:00:25,100 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 22:00:25,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 22:00:25,436 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 41 treesize of output 25 [2023-11-06 22:00:25,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:00:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:25,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:25,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744214987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:25,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:00:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 19 [2023-11-06 22:00:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007423085] [2023-11-06 22:00:25,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:25,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:00:25,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:00:25,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:00:25,884 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:28,463 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2023-11-06 22:00:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:00:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-06 22:00:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:28,466 INFO L225 Difference]: With dead ends: 136 [2023-11-06 22:00:28,466 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:00:28,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=744, Invalid=1908, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 22:00:28,469 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:28,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 352 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:00:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:00:28,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 48. [2023-11-06 22:00:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2023-11-06 22:00:28,485 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 30 [2023-11-06 22:00:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:28,486 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2023-11-06 22:00:28,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2023-11-06 22:00:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:00:28,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:28,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:28,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:28,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:00:28,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:28,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1895186671, now seen corresponding path program 1 times [2023-11-06 22:00:28,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:28,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163828665] [2023-11-06 22:00:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:28,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:29,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:29,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163828665] [2023-11-06 22:00:29,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163828665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:29,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774693615] [2023-11-06 22:00:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:29,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:29,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:29,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:29,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:00:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:29,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:00:29,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:29,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:00:29,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-11-06 22:00:30,007 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 22:00:30,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 22:00:30,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2023-11-06 22:00:30,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:00:30,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:30,313 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 41 treesize of output 25 [2023-11-06 22:00:30,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:00:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:30,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:30,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774693615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:30,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:00:30,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 19 [2023-11-06 22:00:30,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057529137] [2023-11-06 22:00:30,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:30,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:00:30,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:00:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=289, Unknown=1, NotChecked=0, Total=342 [2023-11-06 22:00:30,767 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:33,997 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2023-11-06 22:00:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:00:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-06 22:00:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:33,999 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:00:33,999 INFO L226 Difference]: Without dead ends: 119 [2023-11-06 22:00:34,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=836, Invalid=2243, Unknown=1, NotChecked=0, Total=3080 [2023-11-06 22:00:34,002 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 261 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:34,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 349 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:00:34,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-06 22:00:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 51. [2023-11-06 22:00:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-11-06 22:00:34,015 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 32 [2023-11-06 22:00:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:34,015 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-11-06 22:00:34,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-11-06 22:00:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 22:00:34,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:34,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:34,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:34,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:34,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1135420755, now seen corresponding path program 3 times [2023-11-06 22:00:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:34,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775126374] [2023-11-06 22:00:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:35,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775126374] [2023-11-06 22:00:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775126374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140774749] [2023-11-06 22:00:35,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:00:35,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:35,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:35,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:35,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:00:35,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:00:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:00:35,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:00:35,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:35,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:00:35,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:35,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:35,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:35,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:35,314 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 22:00:35,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 22:00:35,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-06 22:00:35,329 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-06 22:00:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:35,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:35,875 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:35,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-11-06 22:00:35,890 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:35,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-11-06 22:00:35,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-11-06 22:00:35,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-11-06 22:00:36,164 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:36,165 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-06 22:00:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:00:36,171 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 20 treesize of output 8 [2023-11-06 22:00:36,182 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:36,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-06 22:00:36,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:00:36,188 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 20 treesize of output 8 [2023-11-06 22:00:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:36,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140774749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:36,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:00:36,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 15 [2023-11-06 22:00:36,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326498573] [2023-11-06 22:00:36,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:36,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:00:36,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:36,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:00:36,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:00:36,211 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:36,736 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2023-11-06 22:00:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:00:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-06 22:00:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:36,738 INFO L225 Difference]: With dead ends: 102 [2023-11-06 22:00:36,738 INFO L226 Difference]: Without dead ends: 61 [2023-11-06 22:00:36,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:00:36,740 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 69 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:36,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 313 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:00:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-06 22:00:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2023-11-06 22:00:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-11-06 22:00:36,753 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 38 [2023-11-06 22:00:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:36,753 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-11-06 22:00:36,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-11-06 22:00:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 22:00:36,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:36,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:36,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:00:36,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:36,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1704598909, now seen corresponding path program 4 times [2023-11-06 22:00:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:36,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885975363] [2023-11-06 22:00:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:38,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:38,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885975363] [2023-11-06 22:00:38,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885975363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:38,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105146169] [2023-11-06 22:00:38,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:00:38,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:38,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:38,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:38,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:00:38,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:00:38,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:00:38,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-06 22:00:38,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:38,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:00:38,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-11-06 22:00:38,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:00:38,793 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-06 22:00:38,794 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-06 22:00:38,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2023-11-06 22:00:38,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:39,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:39,045 INFO L322 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2023-11-06 22:00:39,046 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2023-11-06 22:00:39,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:00:39,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:39,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 48 [2023-11-06 22:00:39,087 INFO L322 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2023-11-06 22:00:39,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-11-06 22:00:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:39,114 INFO L322 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-11-06 22:00:39,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-11-06 22:00:40,218 INFO L322 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-11-06 22:00:40,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 135 [2023-11-06 22:00:40,322 INFO L322 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-11-06 22:00:40,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 113 [2023-11-06 22:00:41,267 INFO L322 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-11-06 22:00:41,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2023-11-06 22:00:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:41,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:41,449 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:41,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2023-11-06 22:00:41,458 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:41,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2023-11-06 22:00:41,688 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:41,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 107 [2023-11-06 22:00:41,693 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:00:41,695 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 101 treesize of output 83 [2023-11-06 22:00:41,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 98 treesize of output 78 [2023-11-06 22:00:41,708 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:41,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2023-11-06 22:00:41,712 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:00:41,715 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 49 treesize of output 37 [2023-11-06 22:00:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105146169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:41,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:00:41,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 24 [2023-11-06 22:00:41,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872442649] [2023-11-06 22:00:41,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:41,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:00:41,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:41,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:00:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:00:41,900 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 24 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:47,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:47,723 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2023-11-06 22:00:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 22:00:47,730 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-06 22:00:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:47,732 INFO L225 Difference]: With dead ends: 169 [2023-11-06 22:00:47,732 INFO L226 Difference]: Without dead ends: 154 [2023-11-06 22:00:47,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1305, Invalid=3665, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 22:00:47,735 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 445 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:47,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 595 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:00:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-06 22:00:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 64. [2023-11-06 22:00:47,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-11-06 22:00:47,750 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 43 [2023-11-06 22:00:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:47,750 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-11-06 22:00:47,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-11-06 22:00:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 22:00:47,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:47,751 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:47,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:47,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:00:47,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:47,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash -781342395, now seen corresponding path program 2 times [2023-11-06 22:00:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:47,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857171003] [2023-11-06 22:00:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:47,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:49,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857171003] [2023-11-06 22:00:49,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857171003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724222933] [2023-11-06 22:00:49,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:00:49,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:49,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:49,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:49,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:00:49,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:00:49,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:00:49,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:00:49,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:49,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:00:49,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-11-06 22:00:49,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:49,408 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 22:00:49,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:00:49,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:00:49,442 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-06 22:00:49,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-06 22:00:49,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:49,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:49,595 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2023-11-06 22:00:49,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-06 22:00:49,619 INFO L322 Elim1Store]: treesize reduction 37, result has 47.1 percent of original size [2023-11-06 22:00:49,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2023-11-06 22:00:49,645 INFO L322 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-11-06 22:00:49,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2023-11-06 22:00:49,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-06 22:00:50,557 INFO L322 Elim1Store]: treesize reduction 44, result has 70.5 percent of original size [2023-11-06 22:00:50,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 199 [2023-11-06 22:00:50,657 INFO L322 Elim1Store]: treesize reduction 36, result has 69.2 percent of original size [2023-11-06 22:00:50,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 223 [2023-11-06 22:00:53,142 INFO L322 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-11-06 22:00:53,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2023-11-06 22:00:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:53,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:53,300 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:53,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2023-11-06 22:00:53,307 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:53,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2023-11-06 22:00:53,503 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:53,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 121 [2023-11-06 22:00:53,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:00:53,514 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 115 treesize of output 91 [2023-11-06 22:00:53,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 106 treesize of output 86 [2023-11-06 22:00:53,526 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:53,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 61 [2023-11-06 22:00:53,529 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:00:53,532 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 55 treesize of output 37 [2023-11-06 22:00:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:53,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724222933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:53,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:00:53,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 23 [2023-11-06 22:00:53,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579709064] [2023-11-06 22:00:53,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:53,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:00:53,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:00:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=440, Unknown=2, NotChecked=0, Total=506 [2023-11-06 22:00:53,689 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:56,828 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2023-11-06 22:00:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:00:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-06 22:00:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:56,829 INFO L225 Difference]: With dead ends: 85 [2023-11-06 22:00:56,829 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 22:00:56,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=588, Invalid=1666, Unknown=2, NotChecked=0, Total=2256 [2023-11-06 22:00:56,831 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 280 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:56,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 344 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:00:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 22:00:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2023-11-06 22:00:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2023-11-06 22:00:56,846 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 45 [2023-11-06 22:00:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:56,847 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2023-11-06 22:00:56,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2023-11-06 22:00:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 22:00:56,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:56,849 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:56,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:57,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:00:57,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:57,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:57,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2085516585, now seen corresponding path program 5 times [2023-11-06 22:00:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:57,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560866363] [2023-11-06 22:00:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:57,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:58,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:58,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560866363] [2023-11-06 22:00:58,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560866363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:58,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108959457] [2023-11-06 22:00:58,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:00:58,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:58,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:58,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:58,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:00:58,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:00:58,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:00:58,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 22:00:58,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:58,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:58,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:00:58,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:00:58,692 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:58,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:58,716 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 22:00:58,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-06 22:00:58,744 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-06 22:00:58,744 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-06 22:00:58,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:00:58,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:58,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:00:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:58,904 INFO L322 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-06 22:00:58,904 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 67 [2023-11-06 22:00:58,924 INFO L322 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-11-06 22:00:58,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2023-11-06 22:00:58,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-11-06 22:00:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:59,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:59,980 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:59,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-11-06 22:00:59,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:00:59,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2023-11-06 22:01:00,317 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:00,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 127 [2023-11-06 22:01:00,327 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:00,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 118 [2023-11-06 22:01:00,468 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_6 Int) (v_arrayElimArr_24 (Array Int Int)) (v_arrayElimArr_23 (Array Int Int)) (v_prenex_4 (Array Int Int)) (v_prenex_5 (Array Int Int))) (let ((.cse0 (select v_prenex_5 0)) (.cse2 (select v_prenex_4 0))) (or (not (= (select (store |c_#valid| .cse0 1) v_prenex_6) 0)) (not (= (select |c_#valid| .cse0) 0)) (= (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_24) v_prenex_6 v_prenex_5))) (select .cse1 (select (select .cse1 .cse0) .cse2))) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_arrayElimArr_23) v_prenex_6 v_prenex_4) .cse0) .cse2)) 0) (not (= (select v_arrayElimArr_23 .cse2) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= (select v_arrayElimArr_24 .cse2) |c_ULTIMATE.start_main_~l~0#1.base|))))) (forall ((v_arrayElimArr_22 (Array Int Int)) (v_arrayElimArr_21 (Array Int Int)) (v_arrayElimArr_24 (Array Int Int)) (v_arrayElimArr_23 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_34| Int)) (let ((.cse3 (select v_arrayElimArr_22 0)) (.cse4 (select v_arrayElimArr_21 0))) (or (not (= |c_ULTIMATE.start_main_~l~0#1.base| (select v_arrayElimArr_24 .cse3))) (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_23 .cse3))) (not (= (select |c_#valid| .cse4) 0)) (= (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse4 v_arrayElimArr_23) |v_ULTIMATE.start_main_~l~0#1.base_34| v_arrayElimArr_22))) (select (select .cse5 (select (select (store (store |c_#memory_$Pointer$.base| .cse4 v_arrayElimArr_24) |v_ULTIMATE.start_main_~l~0#1.base_34| v_arrayElimArr_21) .cse4) .cse3)) (select (select .cse5 .cse4) .cse3))) 0) (not (= (select (store |c_#valid| .cse4 1) |v_ULTIMATE.start_main_~l~0#1.base_34|) 0)))))) is different from false [2023-11-06 22:01:00,688 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:00,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 76 [2023-11-06 22:01:00,696 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:00,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 60 [2023-11-06 22:01:00,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:00,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:00,703 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:00,707 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 8 [2023-11-06 22:01:00,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 46 treesize of output 34 [2023-11-06 22:01:00,725 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 22:01:00,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-11-06 22:01:00,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-06 22:01:00,739 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:00,739 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 76 [2023-11-06 22:01:00,748 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:00,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 60 [2023-11-06 22:01:00,753 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:00,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2023-11-06 22:01:00,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:00,766 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 100 treesize of output 92 [2023-11-06 22:01:00,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:00,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 85 [2023-11-06 22:01:00,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 75 treesize of output 63 [2023-11-06 22:01:00,797 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:01:00,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-11-06 22:01:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2023-11-06 22:01:00,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108959457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:00,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:00,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 21 [2023-11-06 22:01:00,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547040061] [2023-11-06 22:01:00,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:00,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:01:00,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:01:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=329, Unknown=1, NotChecked=36, Total=420 [2023-11-06 22:01:00,823 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:01,761 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2023-11-06 22:01:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:01:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-06 22:01:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:01,762 INFO L225 Difference]: With dead ends: 133 [2023-11-06 22:01:01,762 INFO L226 Difference]: Without dead ends: 79 [2023-11-06 22:01:01,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=557, Unknown=1, NotChecked=48, Total=702 [2023-11-06 22:01:01,764 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 95 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:01,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 582 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2023-11-06 22:01:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-06 22:01:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2023-11-06 22:01:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.295774647887324) internal successors, (92), 71 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2023-11-06 22:01:01,793 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2023-11-06 22:01:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:01,794 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2023-11-06 22:01:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2023-11-06 22:01:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 22:01:01,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:01,800 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:01,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:02,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:01:02,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:02,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1013477057, now seen corresponding path program 6 times [2023-11-06 22:01:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:02,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935085826] [2023-11-06 22:01:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:02,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:04,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:04,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935085826] [2023-11-06 22:01:04,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935085826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:04,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811004830] [2023-11-06 22:01:04,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:01:04,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:04,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:04,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:01:05,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 22:01:05,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:05,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 22:01:05,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:05,547 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-11-06 22:01:05,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:01:05,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:01:05,621 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 22:01:05,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:01:05,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:01:05,666 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-06 22:01:05,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-06 22:01:05,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:01:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 48 [2023-11-06 22:01:05,888 INFO L322 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2023-11-06 22:01:05,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2023-11-06 22:01:05,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 27 [2023-11-06 22:01:05,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:01:05,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:01:06,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:01:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:06,203 INFO L322 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-06 22:01:06,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 92 [2023-11-06 22:01:06,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:01:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:06,238 INFO L322 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2023-11-06 22:01:06,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 41 [2023-11-06 22:01:06,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 35 [2023-11-06 22:01:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:06,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-11-06 22:01:08,616 INFO L322 Elim1Store]: treesize reduction 56, result has 78.5 percent of original size [2023-11-06 22:01:08,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 371 treesize of output 327 [2023-11-06 22:01:08,822 INFO L322 Elim1Store]: treesize reduction 72, result has 66.2 percent of original size [2023-11-06 22:01:08,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 263 treesize of output 341 [2023-11-06 22:01:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:27,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:27,986 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:27,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 135 [2023-11-06 22:01:27,994 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:27,995 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 117 [2023-11-06 22:01:28,018 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_33 (Array Int Int)) (v_arrayElimArr_34 (Array Int Int)) (v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_41| Int)) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_41| v_arrayElimArr_34)) (.cse5 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_41| v_arrayElimArr_33))) (let ((.cse3 (select (select .cse5 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse4 (select (select .cse2 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_41| v_ArrVal_904) (select (select .cse5 .cse3) .cse4))) (.cse1 (select (select .cse2 .cse3) .cse4))) (or (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_34 0))) (not (= (select v_arrayElimArr_33 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= 3 (select .cse0 (+ 8 .cse1)))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_41|) 0)) (not (= (select .cse0 (+ .cse1 4)) 1))))))) is different from false [2023-11-06 22:01:28,130 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:28,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 251 [2023-11-06 22:01:28,140 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:28,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 221 [2023-11-06 22:01:28,178 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_33 (Array Int Int)) (v_ArrVal_897 (Array Int Int)) (v_arrayElimArr_35 (Array Int Int)) (v_arrayElimArr_34 (Array Int Int)) (v_arrayElimArr_36 (Array Int Int)) (v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_41| Int)) (let ((.cse3 (select v_arrayElimArr_33 0))) (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| .cse3 v_arrayElimArr_36) |v_ULTIMATE.start_main_~l~0#1.base_41| v_arrayElimArr_34)) (.cse7 (store (store |c_#memory_$Pointer$.base| .cse3 v_arrayElimArr_35) |v_ULTIMATE.start_main_~l~0#1.base_41| v_arrayElimArr_33)) (.cse0 (select v_arrayElimArr_34 0))) (let ((.cse5 (select (select .cse7 .cse3) .cse0)) (.cse6 (select (select .cse4 .cse3) .cse0))) (let ((.cse1 (select (store (store |c_#memory_int| .cse3 v_ArrVal_897) |v_ULTIMATE.start_main_~l~0#1.base_41| v_ArrVal_904) (select (select .cse7 .cse5) .cse6))) (.cse2 (select (select .cse4 .cse5) .cse6))) (or (not (= (select v_arrayElimArr_35 .cse0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select .cse1 (+ .cse2 4)) 1)) (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_36 .cse0))) (not (= (select (store |c_#valid| .cse3 1) |v_ULTIMATE.start_main_~l~0#1.base_41|) 0)) (not (= (select |c_#valid| .cse3) 0)) (not (= 3 (select .cse1 (+ 8 .cse2)))))))))) is different from false [2023-11-06 22:01:28,341 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:28,341 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 419 treesize of output 335 [2023-11-06 22:01:28,353 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:28,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 239 [2023-11-06 22:01:28,361 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:28,362 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:28,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:28,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:28,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 119 [2023-11-06 22:01:28,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 170 treesize of output 138 [2023-11-06 22:01:28,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 124 treesize of output 104 [2023-11-06 22:01:28,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:28,387 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:28,388 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:28,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 43 [2023-11-06 22:01:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2023-11-06 22:01:28,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811004830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:28,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:28,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 37 [2023-11-06 22:01:28,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936067210] [2023-11-06 22:01:28,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:01:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:01:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1087, Unknown=2, NotChecked=134, Total=1332 [2023-11-06 22:01:28,629 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 37 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:36,718 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2023-11-06 22:01:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:01:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 37 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-06 22:01:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:36,725 INFO L225 Difference]: With dead ends: 117 [2023-11-06 22:01:36,725 INFO L226 Difference]: Without dead ends: 102 [2023-11-06 22:01:36,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=951, Invalid=3215, Unknown=2, NotChecked=254, Total=4422 [2023-11-06 22:01:36,728 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 622 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:36,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 778 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 466 Invalid, 0 Unknown, 201 Unchecked, 1.2s Time] [2023-11-06 22:01:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-06 22:01:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2023-11-06 22:01:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-11-06 22:01:36,754 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 56 [2023-11-06 22:01:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:36,755 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-11-06 22:01:36,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 37 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-11-06 22:01:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 22:01:36,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:36,756 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:36,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:01:36,964 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:36,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1512229753, now seen corresponding path program 3 times [2023-11-06 22:01:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:36,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58237699] [2023-11-06 22:01:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:39,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58237699] [2023-11-06 22:01:39,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58237699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909294682] [2023-11-06 22:01:39,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:01:39,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:39,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:39,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:01:39,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 22:01:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:39,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 22:01:39,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:39,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-11-06 22:01:39,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:01:40,013 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-06 22:01:40,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-06 22:01:40,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2023-11-06 22:01:40,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:01:40,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:01:40,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:01:40,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:40,212 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2023-11-06 22:01:40,258 INFO L322 Elim1Store]: treesize reduction 84, result has 37.8 percent of original size [2023-11-06 22:01:40,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 65 [2023-11-06 22:01:40,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 31 [2023-11-06 22:01:40,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-06 22:01:40,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-06 22:01:40,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:01:40,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:40,598 INFO L322 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-06 22:01:40,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 203 treesize of output 140 [2023-11-06 22:01:40,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:40,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 150 [2023-11-06 22:01:40,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:01:40,644 INFO L322 Elim1Store]: treesize reduction 53, result has 48.0 percent of original size [2023-11-06 22:01:40,644 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2023-11-06 22:01:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:40,683 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:01:40,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 49 [2023-11-06 22:01:43,131 INFO L322 Elim1Store]: treesize reduction 60, result has 73.8 percent of original size [2023-11-06 22:01:43,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 395 treesize of output 313 [2023-11-06 22:01:43,453 INFO L322 Elim1Store]: treesize reduction 60, result has 73.8 percent of original size [2023-11-06 22:01:43,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 283 treesize of output 381 [2023-11-06 22:02:04,517 INFO L322 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-11-06 22:02:04,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2023-11-06 22:02:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:04,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:04,789 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:04,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 135 [2023-11-06 22:02:04,797 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:04,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 117 [2023-11-06 22:02:05,037 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:05,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 221 [2023-11-06 22:02:05,049 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:05,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 203 [2023-11-06 22:02:05,094 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_44 (Array Int Int)) (v_arrayElimArr_43 (Array Int Int)) (v_ArrVal_1067 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_48| Int) (v_ArrVal_1075 (Array Int Int)) (v_arrayElimArr_42 (Array Int Int)) (v_arrayElimArr_41 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_41 0))) (let ((.cse3 (store (store |c_#memory_$Pointer$.offset| .cse0 v_arrayElimArr_43) |v_ULTIMATE.start_main_~l~0#1.base_48| v_arrayElimArr_42)) (.cse6 (store (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_44) |v_ULTIMATE.start_main_~l~0#1.base_48| v_arrayElimArr_41))) (let ((.cse4 (select (select .cse6 .cse0) 0)) (.cse5 (select (select .cse3 .cse0) 0))) (let ((.cse1 (select (store (store |c_#memory_int| .cse0 v_ArrVal_1067) |v_ULTIMATE.start_main_~l~0#1.base_48| v_ArrVal_1075) (select (select .cse6 .cse4) .cse5))) (.cse2 (select (select .cse3 .cse4) .cse5))) (or (not (= (select v_arrayElimArr_42 0) 0)) (not (= 0 (select (store |c_#valid| .cse0 1) |v_ULTIMATE.start_main_~l~0#1.base_48|))) (not (= (select |c_#valid| .cse0) 0)) (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_43 0))) (not (= |c_ULTIMATE.start_main_~l~0#1.base| (select v_arrayElimArr_44 0))) (not (= 2 (select .cse1 (+ .cse2 8)))) (not (= (select .cse1 (+ .cse2 4)) 0)))))))) is different from false [2023-11-06 22:02:05,310 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:05,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 303 [2023-11-06 22:02:05,321 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:05,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 219 [2023-11-06 22:02:05,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:05,328 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:05,329 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:05,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:05,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 107 [2023-11-06 22:02:05,341 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:05,344 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 329 treesize of output 305 [2023-11-06 22:02:05,362 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:05,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 294 [2023-11-06 22:02:05,379 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:05,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 244 [2023-11-06 22:02:05,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 17 [2023-11-06 22:02:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2023-11-06 22:02:05,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909294682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:05,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:05,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 29 [2023-11-06 22:02:05,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207064172] [2023-11-06 22:02:05,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:05,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:02:05,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:02:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=674, Unknown=5, NotChecked=52, Total=812 [2023-11-06 22:02:05,646 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 29 states, 29 states have (on average 4.379310344827586) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:14,072 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2023-11-06 22:02:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:02:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.379310344827586) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-06 22:02:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:14,074 INFO L225 Difference]: With dead ends: 106 [2023-11-06 22:02:14,074 INFO L226 Difference]: Without dead ends: 104 [2023-11-06 22:02:14,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=937, Invalid=2844, Unknown=5, NotChecked=120, Total=3906 [2023-11-06 22:02:14,076 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 429 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:14,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 614 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 472 Invalid, 0 Unknown, 102 Unchecked, 1.1s Time] [2023-11-06 22:02:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-06 22:02:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2023-11-06 22:02:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 82 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-11-06 22:02:14,094 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 58 [2023-11-06 22:02:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:14,095 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-11-06 22:02:14,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.379310344827586) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-11-06 22:02:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-06 22:02:14,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:14,096 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:14,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:14,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:02:14,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:14,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1492842773, now seen corresponding path program 7 times [2023-11-06 22:02:14,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:14,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196217111] [2023-11-06 22:02:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:16,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196217111] [2023-11-06 22:02:16,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196217111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603968261] [2023-11-06 22:02:16,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:02:16,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:16,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:16,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:02:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:16,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 22:02:16,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:16,517 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:02:16,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:02:16,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:02:16,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:16,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:16,642 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 22:02:16,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-06 22:02:16,668 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 22:02:16,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-06 22:02:16,707 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-06 22:02:16,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-06 22:02:16,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:16,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:16,845 INFO L322 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-06 22:02:16,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 67 [2023-11-06 22:02:16,892 INFO L322 Elim1Store]: treesize reduction 84, result has 37.8 percent of original size [2023-11-06 22:02:16,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 65 [2023-11-06 22:02:16,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-11-06 22:02:17,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:17,149 INFO L322 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2023-11-06 22:02:17,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 193 treesize of output 159 [2023-11-06 22:02:17,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-06 22:02:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:17,184 INFO L322 Elim1Store]: treesize reduction 49, result has 9.3 percent of original size [2023-11-06 22:02:17,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 197 [2023-11-06 22:02:17,218 INFO L322 Elim1Store]: treesize reduction 12, result has 82.6 percent of original size [2023-11-06 22:02:17,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 69 [2023-11-06 22:02:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:19,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:19,220 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:19,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 133 [2023-11-06 22:02:19,227 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:19,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 112 [2023-11-06 22:02:19,561 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:19,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 219 [2023-11-06 22:02:19,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:19,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 198 [2023-11-06 22:02:19,710 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_55 (Array Int Int)) (v_arrayElimArr_54 (Array Int Int)) (v_prenex_11 Int) (v_prenex_13 (Array Int Int)) (v_prenex_12 (Array Int Int))) (let ((.cse5 (select v_prenex_12 0)) (.cse4 (select v_prenex_13 0))) (or (= (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| .cse4 v_arrayElimArr_55) v_prenex_11 v_prenex_12)) (.cse1 (store (store |c_#memory_$Pointer$.base| .cse4 v_arrayElimArr_54) v_prenex_11 v_prenex_13))) (let ((.cse2 (select (select .cse1 .cse4) .cse5)) (.cse3 (select (select .cse0 .cse4) .cse5))) (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (select (select .cse0 .cse2) .cse3)))) 0) (not (= (select v_arrayElimArr_54 .cse5) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_55 .cse5))) (not (= (select |c_#valid| .cse4) 0)) (not (= (select (store |c_#valid| .cse4 1) v_prenex_11) 0))))) (forall ((v_arrayElimArr_55 (Array Int Int)) (v_arrayElimArr_54 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_56| Int) (v_arrayElimArr_53 (Array Int Int)) (v_arrayElimArr_52 (Array Int Int))) (let ((.cse6 (select v_arrayElimArr_53 0)) (.cse11 (select v_arrayElimArr_52 0))) (or (not (= (select v_arrayElimArr_55 .cse6) |c_ULTIMATE.start_main_~l~0#1.offset|)) (= (let ((.cse10 (store (store |c_#memory_$Pointer$.offset| .cse11 v_arrayElimArr_55) |v_ULTIMATE.start_main_~l~0#1.base_56| v_arrayElimArr_53)) (.cse7 (store (store |c_#memory_$Pointer$.base| .cse11 v_arrayElimArr_54) |v_ULTIMATE.start_main_~l~0#1.base_56| v_arrayElimArr_52))) (let ((.cse8 (select (select .cse7 .cse11) .cse6)) (.cse9 (select (select .cse10 .cse11) .cse6))) (select (select .cse7 (select (select .cse7 .cse8) .cse9)) (select (select .cse10 .cse8) .cse9)))) 0) (not (= (select (store |c_#valid| .cse11 1) |v_ULTIMATE.start_main_~l~0#1.base_56|) 0)) (not (= (select v_arrayElimArr_54 .cse6) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select |c_#valid| .cse11) 0)))))) is different from false [2023-11-06 22:02:19,907 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:19,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 361 [2023-11-06 22:02:19,918 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:19,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 354 treesize of output 340 [2023-11-06 22:02:20,139 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_57 (Array Int Int)) (v_arrayElimArr_56 (Array Int Int)) (v_prenex_11 Int) (v_prenex_13 (Array Int Int)) (v_prenex_12 (Array Int Int)) (v_prenex_16 (Array Int Int)) (v_prenex_15 (Array Int Int))) (let ((.cse6 (select v_prenex_12 0))) (let ((.cse7 (select v_prenex_16 .cse6))) (let ((.cse0 (store |c_#valid| .cse7 1)) (.cse1 (select v_prenex_13 0)) (.cse8 (select v_prenex_15 .cse6))) (or (not (= (select (store .cse0 .cse1 1) v_prenex_11) 0)) (= (let ((.cse2 (store (store (store |c_#memory_$Pointer$.offset| .cse7 v_arrayElimArr_57) .cse1 v_prenex_15) v_prenex_11 v_prenex_12)) (.cse3 (store (store (store |c_#memory_$Pointer$.base| .cse7 v_arrayElimArr_56) .cse1 v_prenex_16) v_prenex_11 v_prenex_13))) (let ((.cse4 (select (select .cse3 .cse1) .cse6)) (.cse5 (select (select .cse2 .cse1) .cse6))) (select (select .cse2 (select (select .cse3 .cse4) .cse5)) (select (select .cse2 .cse4) .cse5)))) 0) (not (= (select .cse0 .cse1) 0)) (not (= |c_ULTIMATE.start_main_~l~0#1.offset| (select v_arrayElimArr_57 .cse8))) (not (= (select |c_#valid| .cse7) 0)) (not (= (select v_arrayElimArr_56 .cse8) |c_ULTIMATE.start_main_~l~0#1.base|))))))) (forall ((v_arrayElimArr_55 (Array Int Int)) (v_arrayElimArr_54 (Array Int Int)) (v_arrayElimArr_57 (Array Int Int)) (v_arrayElimArr_56 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_56| Int) (v_arrayElimArr_53 (Array Int Int)) (v_arrayElimArr_52 (Array Int Int))) (let ((.cse14 (select v_arrayElimArr_53 0))) (let ((.cse15 (select v_arrayElimArr_54 .cse14))) (let ((.cse16 (store |c_#valid| .cse15 1)) (.cse13 (select v_arrayElimArr_52 0)) (.cse17 (select v_arrayElimArr_55 .cse14))) (or (= (let ((.cse12 (store (store (store |c_#memory_$Pointer$.offset| .cse15 v_arrayElimArr_57) .cse13 v_arrayElimArr_55) |v_ULTIMATE.start_main_~l~0#1.base_56| v_arrayElimArr_53)) (.cse9 (store (store (store |c_#memory_$Pointer$.base| .cse15 v_arrayElimArr_56) .cse13 v_arrayElimArr_54) |v_ULTIMATE.start_main_~l~0#1.base_56| v_arrayElimArr_52))) (let ((.cse10 (select (select .cse9 .cse13) .cse14)) (.cse11 (select (select .cse12 .cse13) .cse14))) (select (select .cse9 (select (select .cse9 .cse10) .cse11)) (select (select .cse12 .cse10) .cse11)))) 0) (not (= (select .cse16 .cse13) 0)) (not (= (select v_arrayElimArr_56 .cse17) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select (store .cse16 .cse13 1) |v_ULTIMATE.start_main_~l~0#1.base_56|) 0)) (not (= (select v_arrayElimArr_57 .cse17) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= 0 (select |c_#valid| .cse15))))))))) is different from false [2023-11-06 22:02:20,471 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:20,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 247 [2023-11-06 22:02:20,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:20,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 167 [2023-11-06 22:02:20,488 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:20,488 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:20,491 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:20,493 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 89 treesize of output 79 [2023-11-06 22:02:20,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 137 [2023-11-06 22:02:20,509 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:20,509 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:20,549 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:20,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111662 treesize of output 109654 [2023-11-06 22:02:21,751 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:21,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 9500 treesize of output 7370 [2023-11-06 22:02:21,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7386 treesize of output 6754 [2023-11-06 22:02:22,005 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:22,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6722 treesize of output 6500 [2023-11-06 22:02:22,143 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:22,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6485 treesize of output 5133 [2023-11-06 22:02:22,294 INFO L322 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-06 22:02:22,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-11-06 22:02:22,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-11-06 22:02:22,421 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:22,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 227 [2023-11-06 22:02:22,431 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:22,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 167 [2023-11-06 22:02:22,436 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:22,436 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:22,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:22,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:22,442 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:02:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:22,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 8 [2023-11-06 22:02:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 31 not checked. [2023-11-06 22:02:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603968261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:22,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 26 [2023-11-06 22:02:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79167051] [2023-11-06 22:02:22,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:22,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:02:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:02:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=492, Unknown=2, NotChecked=90, Total=650 [2023-11-06 22:02:22,468 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:24,299 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2023-11-06 22:02:24,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:02:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-06 22:02:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:24,301 INFO L225 Difference]: With dead ends: 164 [2023-11-06 22:02:24,301 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 22:02:24,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=122, Invalid=876, Unknown=2, NotChecked=122, Total=1122 [2023-11-06 22:02:24,303 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 127 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:24,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 762 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 419 Invalid, 0 Unknown, 198 Unchecked, 0.7s Time] [2023-11-06 22:02:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 22:02:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2023-11-06 22:02:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 87 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2023-11-06 22:02:24,324 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 64 [2023-11-06 22:02:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:24,324 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2023-11-06 22:02:24,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2023-11-06 22:02:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 22:02:24,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:24,326 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:24,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:24,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:02:24,526 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:24,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash -377962859, now seen corresponding path program 8 times [2023-11-06 22:02:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388353614] [2023-11-06 22:02:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:24,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:27,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:27,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388353614] [2023-11-06 22:02:27,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388353614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:27,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466986651] [2023-11-06 22:02:27,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:02:27,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:27,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:27,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500b58ff-0d9e-4d73-9339-8721a7b9d930/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:02:27,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:02:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:27,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-06 22:02:27,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:27,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-11-06 22:02:27,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:02:27,817 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 22:02:27,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:02:27,843 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-06 22:02:27,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-06 22:02:27,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:02:27,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:02:27,995 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 48 [2023-11-06 22:02:28,023 INFO L322 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2023-11-06 22:02:28,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-11-06 22:02:28,066 INFO L322 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2023-11-06 22:02:28,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2023-11-06 22:02:28,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:28,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:02:28,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,344 INFO L322 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-06 22:02:28,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 92 [2023-11-06 22:02:28,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,400 INFO L322 Elim1Store]: treesize reduction 96, result has 38.1 percent of original size [2023-11-06 22:02:28,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 93 [2023-11-06 22:02:28,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-11-06 22:02:28,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 35 [2023-11-06 22:02:28,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-06 22:02:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,824 INFO L322 Elim1Store]: treesize reduction 64, result has 14.7 percent of original size [2023-11-06 22:02:28,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 182 [2023-11-06 22:02:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,848 INFO L322 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2023-11-06 22:02:28,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 278 [2023-11-06 22:02:28,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:02:28,885 INFO L322 Elim1Store]: treesize reduction 61, result has 48.3 percent of original size [2023-11-06 22:02:28,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 71 [2023-11-06 22:02:28,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:28,932 INFO L322 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-11-06 22:02:28,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 56 [2023-11-06 22:02:32,914 INFO L322 Elim1Store]: treesize reduction 64, result has 81.7 percent of original size [2023-11-06 22:02:32,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 649 treesize of output 457 [2023-11-06 22:02:33,333 INFO L322 Elim1Store]: treesize reduction 88, result has 74.8 percent of original size [2023-11-06 22:02:33,334 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 357 treesize of output 531