./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnifrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnifrev.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:57,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:57,445 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:57,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:57,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:57,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:57,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:57,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:57,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:57,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:57,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:57,508 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:57,508 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:57,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:57,511 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:57,511 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:57,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:57,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:57,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:57,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:57,513 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:57,514 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:57,514 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:57,515 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:57,515 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:57,516 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:57,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:57,517 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:57,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:57,518 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:57,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:57,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:57,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:57,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:57,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:57,521 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:57,521 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:57,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:57,522 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:57,522 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_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed [2023-11-19 07:50:57,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:57,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:57,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:57,883 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:57,883 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:57,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-tiling/rewnifrev.c [2023-11-19 07:51:01,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:51:01,379 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:51:01,380 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/sv-benchmarks/c/array-tiling/rewnifrev.c [2023-11-19 07:51:01,387 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/data/67e924a8b/f440d77a2c5c497cb1688cef07d56609/FLAG4a677c786 [2023-11-19 07:51:01,407 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/data/67e924a8b/f440d77a2c5c497cb1688cef07d56609 [2023-11-19 07:51:01,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:51:01,412 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:51:01,414 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:51:01,414 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:51:01,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:51:01,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e4af56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01, skipping insertion in model container [2023-11-19 07:51:01,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,441 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:51:01,638 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_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/sv-benchmarks/c/array-tiling/rewnifrev.c[400,413] [2023-11-19 07:51:01,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:51:01,679 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:51:01,697 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_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/sv-benchmarks/c/array-tiling/rewnifrev.c[400,413] [2023-11-19 07:51:01,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:51:01,740 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:51:01,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01 WrapperNode [2023-11-19 07:51:01,741 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:51:01,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:51:01,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:51:01,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:51:01,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,791 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-11-19 07:51:01,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:51:01,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:51:01,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:51:01,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:51:01,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,840 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:51:01,856 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:51:01,857 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:51:01,857 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:51:01,858 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:51:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:01,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:51:01,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:51:01,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:51:01,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:51:01,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:51:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:51:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:51:01,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:51:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:51:02,031 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:51:02,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:51:02,197 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:51:02,210 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:51:02,210 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:51:02,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:02 BoogieIcfgContainer [2023-11-19 07:51:02,216 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:51:02,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:51:02,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:51:02,226 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:51:02,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:51:01" (1/3) ... [2023-11-19 07:51:02,228 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df7d636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:02, skipping insertion in model container [2023-11-19 07:51:02,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01" (2/3) ... [2023-11-19 07:51:02,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df7d636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:02, skipping insertion in model container [2023-11-19 07:51:02,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:02" (3/3) ... [2023-11-19 07:51:02,231 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2023-11-19 07:51:02,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:51:02,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:51:02,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:51:02,350 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59ecd0bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:51:02,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:51:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:51:02,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:02,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:02,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:02,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2023-11-19 07:51:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306046334] [2023-11-19 07:51:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306046334] [2023-11-19 07:51:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306046334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:02,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:02,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:51:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244631617] [2023-11-19 07:51:02,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:02,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:51:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:51:02,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:51:02,758 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:02,781 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2023-11-19 07:51:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:51:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2023-11-19 07:51:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:02,794 INFO L225 Difference]: With dead ends: 31 [2023-11-19 07:51:02,795 INFO L226 Difference]: Without dead ends: 14 [2023-11-19 07:51:02,799 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 [2023-11-19 07:51:02,829 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2023-11-19 07:51:02,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:51:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-19 07:51:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-19 07:51:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-19 07:51:02,875 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-11-19 07:51:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:02,877 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-19 07:51:02,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-19 07:51:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:51:02,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:02,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:02,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:51:02,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:02,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:02,883 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2023-11-19 07:51:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:02,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275897814] [2023-11-19 07:51:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:03,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:03,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275897814] [2023-11-19 07:51:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275897814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:03,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:03,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:51:03,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775214131] [2023-11-19 07:51:03,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:03,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:03,039 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:03,079 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2023-11-19 07:51:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-11-19 07:51:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:03,081 INFO L225 Difference]: With dead ends: 29 [2023-11-19 07:51:03,081 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 07:51:03,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:03,084 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:03,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:51:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 07:51:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-11-19 07:51:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-19 07:51:03,090 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2023-11-19 07:51:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:03,091 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-19 07:51:03,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-19 07:51:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:51:03,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:03,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:51:03,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:03,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2023-11-19 07:51:03,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:03,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386326088] [2023-11-19 07:51:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:03,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:03,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386326088] [2023-11-19 07:51:03,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386326088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:03,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:03,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:51:03,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700252641] [2023-11-19 07:51:03,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:03,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:51:03,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:51:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:51:03,232 INFO L87 Difference]: Start difference. First operand 16 states and 18 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) [2023-11-19 07:51:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:03,290 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-11-19 07:51:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:51:03,291 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 [2023-11-19 07:51:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:03,292 INFO L225 Difference]: With dead ends: 32 [2023-11-19 07:51:03,293 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 07:51:03,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:51:03,295 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:03,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:51:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 07:51:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-11-19 07:51:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-19 07:51:03,313 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2023-11-19 07:51:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:03,315 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-19 07:51:03,315 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) [2023-11-19 07:51:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-19 07:51:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 07:51:03,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:03,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:03,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:51:03,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:03,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2023-11-19 07:51:03,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:03,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590099642] [2023-11-19 07:51:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:03,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:51:03,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590099642] [2023-11-19 07:51:03,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590099642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:03,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:03,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:51:03,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797264209] [2023-11-19 07:51:03,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:03,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:51:03,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:51:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:51:03,979 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:04,121 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-19 07:51:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:51:04,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 16 [2023-11-19 07:51:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:04,123 INFO L225 Difference]: With dead ends: 27 [2023-11-19 07:51:04,123 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 07:51:04,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:51:04,126 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:04,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:51:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 07:51:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-11-19 07:51:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-19 07:51:04,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2023-11-19 07:51:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:04,140 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-19 07:51:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-19 07:51:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 07:51:04,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:04,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:51:04,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:04,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2023-11-19 07:51:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:04,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104749650] [2023-11-19 07:51:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:04,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:04,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104749650] [2023-11-19 07:51:04,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104749650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:04,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903922297] [2023-11-19 07:51:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:04,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:04,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:04,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:04,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:51:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:04,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:51:04,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:05,066 INFO L378 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 23 treesize of output 1 [2023-11-19 07:51:05,207 INFO L378 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 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-19 07:51:05,302 INFO L378 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 19 treesize of output 7 [2023-11-19 07:51:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:05,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:05,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903922297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:05,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:05,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2023-11-19 07:51:05,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724790564] [2023-11-19 07:51:05,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:05,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:51:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:51:05,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:51:05,572 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:06,094 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-11-19 07:51:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:51:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 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 20 [2023-11-19 07:51:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:06,096 INFO L225 Difference]: With dead ends: 33 [2023-11-19 07:51:06,096 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 07:51:06,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:51:06,098 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:06,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 42 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:51:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 07:51:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-11-19 07:51:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-11-19 07:51:06,107 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2023-11-19 07:51:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:06,107 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-11-19 07:51:06,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-11-19 07:51:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:51:06,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:06,109 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:06,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:51:06,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:06,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:06,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2023-11-19 07:51:06,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:06,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804498297] [2023-11-19 07:51:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:06,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:06,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:06,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804498297] [2023-11-19 07:51:06,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804498297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682985360] [2023-11-19 07:51:06,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:51:06,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:06,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:06,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:06,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:51:06,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:51:06,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:06,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:51:06,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:06,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682985360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:06,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2023-11-19 07:51:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69723455] [2023-11-19 07:51:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:51:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:51:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:51:06,769 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:06,894 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-11-19 07:51:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:51:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-19 07:51:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:06,895 INFO L225 Difference]: With dead ends: 56 [2023-11-19 07:51:06,895 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 07:51:06,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:51:06,897 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:06,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:51:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 07:51:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-19 07:51:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2023-11-19 07:51:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-11-19 07:51:06,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2023-11-19 07:51:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:06,908 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-11-19 07:51:06,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-11-19 07:51:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:51:06,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:06,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:06,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:07,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:51:07,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:07,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2023-11-19 07:51:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:07,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239020150] [2023-11-19 07:51:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:07,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:07,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239020150] [2023-11-19 07:51:07,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239020150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604834019] [2023-11-19 07:51:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:51:07,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:07,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:07,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:51:08,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:51:08,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:08,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:51:08,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:08,081 INFO L378 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 19 treesize of output 1 [2023-11-19 07:51:08,153 INFO L378 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 31 treesize of output 30 [2023-11-19 07:51:08,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:08,223 INFO L378 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 1 case distinctions, treesize of input 46 treesize of output 33 [2023-11-19 07:51:08,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:08,404 INFO L378 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-19 07:51:08,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:51:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:08,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:09,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604834019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:09,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:09,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 32 [2023-11-19 07:51:09,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223241526] [2023-11-19 07:51:09,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:09,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 07:51:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 07:51:09,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2023-11-19 07:51:09,079 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:10,626 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2023-11-19 07:51:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:51:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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 28 [2023-11-19 07:51:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:10,628 INFO L225 Difference]: With dead ends: 67 [2023-11-19 07:51:10,628 INFO L226 Difference]: Without dead ends: 48 [2023-11-19 07:51:10,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=917, Invalid=3243, Unknown=0, NotChecked=0, Total=4160 [2023-11-19 07:51:10,632 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:10,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 77 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:51:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-19 07:51:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2023-11-19 07:51:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 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) [2023-11-19 07:51:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-19 07:51:10,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2023-11-19 07:51:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:10,644 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-19 07:51:10,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-19 07:51:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 07:51:10,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:10,646 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:10,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:10,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:51:10,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:10,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 4 times [2023-11-19 07:51:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:10,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516947955] [2023-11-19 07:51:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:10,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:11,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516947955] [2023-11-19 07:51:11,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516947955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039309975] [2023-11-19 07:51:11,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:51:11,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:11,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:11,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:51:11,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:51:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:11,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:51:11,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:11,861 INFO L378 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 23 treesize of output 1 [2023-11-19 07:51:11,898 INFO L378 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 0 case distinctions, treesize of input 33 treesize of output 32 [2023-11-19 07:51:11,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:11,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 52 treesize of output 35 [2023-11-19 07:51:11,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:11,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:12,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:12,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:12,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:12,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 34 treesize of output 18 [2023-11-19 07:51:12,412 INFO L378 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 19 treesize of output 7 [2023-11-19 07:51:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:12,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039309975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:12,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 38 [2023-11-19 07:51:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870683967] [2023-11-19 07:51:12,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-19 07:51:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-19 07:51:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:51:12,864 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:14,479 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2023-11-19 07:51:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-19 07:51:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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 36 [2023-11-19 07:51:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:14,481 INFO L225 Difference]: With dead ends: 76 [2023-11-19 07:51:14,481 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 07:51:14,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=833, Invalid=3589, Unknown=0, NotChecked=0, Total=4422 [2023-11-19 07:51:14,484 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:14,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 95 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:51:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 07:51:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2023-11-19 07:51:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-19 07:51:14,502 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2023-11-19 07:51:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:14,503 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-19 07:51:14,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-19 07:51:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 07:51:14,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:14,505 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:14,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:14,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:14,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 5 times [2023-11-19 07:51:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167294264] [2023-11-19 07:51:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:14,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167294264] [2023-11-19 07:51:14,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167294264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411771258] [2023-11-19 07:51:14,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:51:14,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:14,889 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:14,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:51:15,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-19 07:51:15,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:15,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:51:15,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:15,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:15,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411771258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:15,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:15,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 18 [2023-11-19 07:51:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676337724] [2023-11-19 07:51:15,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:15,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:51:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:51:15,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:51:15,355 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:15,533 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2023-11-19 07:51:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:51:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 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 40 [2023-11-19 07:51:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:15,535 INFO L225 Difference]: With dead ends: 91 [2023-11-19 07:51:15,535 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:51:15,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:51:15,536 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:15,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:51:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:51:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-19 07:51:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-11-19 07:51:15,558 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2023-11-19 07:51:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:15,558 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-11-19 07:51:15,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-11-19 07:51:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 07:51:15,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:15,564 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:15,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:51:15,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:15,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:15,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:15,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 6 times [2023-11-19 07:51:15,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715222731] [2023-11-19 07:51:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:15,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:16,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715222731] [2023-11-19 07:51:16,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715222731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143825768] [2023-11-19 07:51:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:51:16,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:16,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:16,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:51:17,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-19 07:51:17,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:17,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-19 07:51:17,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:17,064 INFO L378 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 19 treesize of output 1 [2023-11-19 07:51:17,134 INFO L378 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 0 case distinctions, treesize of input 31 treesize of output 30 [2023-11-19 07:51:17,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:17,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 33 [2023-11-19 07:51:17,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:17,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-19 07:51:17,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:17,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 38 [2023-11-19 07:51:17,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:17,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-19 07:51:17,511 INFO L378 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 38 [2023-11-19 07:51:17,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:17,763 INFO L378 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2023-11-19 07:51:18,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:18,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-11-19 07:51:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:18,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:18,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143825768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:18,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:18,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 17] total 41 [2023-11-19 07:51:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420124089] [2023-11-19 07:51:18,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:18,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-19 07:51:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:18,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-19 07:51:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 07:51:18,824 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:20,409 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-11-19 07:51:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:51:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 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 44 [2023-11-19 07:51:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:20,410 INFO L225 Difference]: With dead ends: 64 [2023-11-19 07:51:20,411 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 07:51:20,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=907, Invalid=4063, Unknown=0, NotChecked=0, Total=4970 [2023-11-19 07:51:20,414 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:20,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 115 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:51:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 07:51:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2023-11-19 07:51:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-11-19 07:51:20,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2023-11-19 07:51:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:20,425 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-11-19 07:51:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-11-19 07:51:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 07:51:20,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:20,426 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:20,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:20,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:20,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:20,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 7 times [2023-11-19 07:51:20,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:20,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382789699] [2023-11-19 07:51:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:20,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:20,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382789699] [2023-11-19 07:51:20,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382789699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:20,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890662541] [2023-11-19 07:51:20,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:51:20,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:20,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:20,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:20,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:51:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:20,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:51:20,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:21,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890662541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:21,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:21,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 21 [2023-11-19 07:51:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306466681] [2023-11-19 07:51:21,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:21,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:51:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:51:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:51:21,357 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:21,518 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2023-11-19 07:51:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:51:21,519 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 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 48 [2023-11-19 07:51:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:21,521 INFO L225 Difference]: With dead ends: 92 [2023-11-19 07:51:21,521 INFO L226 Difference]: Without dead ends: 55 [2023-11-19 07:51:21,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:51:21,523 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:21,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:51:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-19 07:51:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-11-19 07:51:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-11-19 07:51:21,538 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2023-11-19 07:51:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:21,538 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-11-19 07:51:21,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-11-19 07:51:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 07:51:21,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:21,540 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:21,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:21,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:21,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:21,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:21,754 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 8 times [2023-11-19 07:51:21,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:21,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397162223] [2023-11-19 07:51:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:23,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:23,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397162223] [2023-11-19 07:51:23,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397162223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:23,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971002845] [2023-11-19 07:51:23,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:51:23,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:23,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:23,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:23,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:51:23,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:51:23,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:23,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-19 07:51:23,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:23,189 INFO L378 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 23 treesize of output 1 [2023-11-19 07:51:23,231 INFO L378 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 0 case distinctions, treesize of input 33 treesize of output 32 [2023-11-19 07:51:23,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 52 treesize of output 35 [2023-11-19 07:51:23,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:23,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:23,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:23,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:23,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:23,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:23,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:23,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 34 treesize of output 18 [2023-11-19 07:51:24,203 INFO L378 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 19 treesize of output 7 [2023-11-19 07:51:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:24,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971002845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:25,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 18] total 54 [2023-11-19 07:51:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096556930] [2023-11-19 07:51:25,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:25,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-19 07:51:25,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-19 07:51:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2529, Unknown=0, NotChecked=0, Total=2862 [2023-11-19 07:51:25,040 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 54 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:27,179 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2023-11-19 07:51:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:51:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 54 states have internal predecessors, (144), 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 52 [2023-11-19 07:51:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:27,182 INFO L225 Difference]: With dead ends: 75 [2023-11-19 07:51:27,183 INFO L226 Difference]: Without dead ends: 73 [2023-11-19 07:51:27,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1325, Invalid=6865, Unknown=0, NotChecked=0, Total=8190 [2023-11-19 07:51:27,187 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 202 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:27,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 223 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:51:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-19 07:51:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2023-11-19 07:51:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-11-19 07:51:27,198 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2023-11-19 07:51:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:27,198 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-11-19 07:51:27,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 54 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-11-19 07:51:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 07:51:27,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:27,200 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:27,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 07:51:27,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:51:27,421 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:27,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 9 times [2023-11-19 07:51:27,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:27,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594979535] [2023-11-19 07:51:27,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:27,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:27,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594979535] [2023-11-19 07:51:27,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594979535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:27,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749999290] [2023-11-19 07:51:27,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:51:27,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:27,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:27,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:27,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:51:27,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-19 07:51:27,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:27,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:51:27,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:28,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 88 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:28,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749999290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:28,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:28,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 24 [2023-11-19 07:51:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812693654] [2023-11-19 07:51:28,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:51:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:51:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:51:28,293 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:28,475 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2023-11-19 07:51:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:51:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 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 [2023-11-19 07:51:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:28,477 INFO L225 Difference]: With dead ends: 104 [2023-11-19 07:51:28,477 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:51:28,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:51:28,479 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:28,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 78 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:51:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:51:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-11-19 07:51:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2023-11-19 07:51:28,495 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2023-11-19 07:51:28,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:28,496 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2023-11-19 07:51:28,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2023-11-19 07:51:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 07:51:28,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:28,498 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:28,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:28,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:51:28,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:28,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 10 times [2023-11-19 07:51:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566923520] [2023-11-19 07:51:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:30,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:30,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566923520] [2023-11-19 07:51:30,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566923520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:30,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009331709] [2023-11-19 07:51:30,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:51:30,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:30,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:30,114 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:30,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:51:30,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:51:30,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:30,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-19 07:51:30,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:30,242 INFO L378 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 23 treesize of output 1 [2023-11-19 07:51:30,260 INFO L378 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 0 case distinctions, treesize of input 33 treesize of output 32 [2023-11-19 07:51:30,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 52 treesize of output 35 [2023-11-19 07:51:30,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:30,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:30,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:30,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:30,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:30,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:30,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 48 [2023-11-19 07:51:30,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 40 [2023-11-19 07:51:30,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:30,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 34 treesize of output 18 [2023-11-19 07:51:31,283 INFO L378 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 19 treesize of output 7 [2023-11-19 07:51:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:31,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 36 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:31,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009331709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:31,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:31,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 20] total 46 [2023-11-19 07:51:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476000943] [2023-11-19 07:51:31,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-19 07:51:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-19 07:51:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2023-11-19 07:51:31,856 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 46 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) [2023-11-19 07:51:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:33,886 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2023-11-19 07:51:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-19 07:51:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 46 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 60 [2023-11-19 07:51:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:33,887 INFO L225 Difference]: With dead ends: 80 [2023-11-19 07:51:33,887 INFO L226 Difference]: Without dead ends: 78 [2023-11-19 07:51:33,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1021, Invalid=5621, Unknown=0, NotChecked=0, Total=6642 [2023-11-19 07:51:33,891 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:33,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 297 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:51:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-19 07:51:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2023-11-19 07:51:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 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) [2023-11-19 07:51:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-11-19 07:51:33,904 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2023-11-19 07:51:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:33,905 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-11-19 07:51:33,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 46 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) [2023-11-19 07:51:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-11-19 07:51:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 07:51:33,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:33,906 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:33,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:34,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:51:34,118 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:34,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 11 times [2023-11-19 07:51:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:34,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985780778] [2023-11-19 07:51:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:34,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985780778] [2023-11-19 07:51:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985780778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836412539] [2023-11-19 07:51:34,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:51:34,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:34,400 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:34,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:51:34,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-19 07:51:34,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:34,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:51:34,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:34,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836412539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:35,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:35,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 27 [2023-11-19 07:51:35,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633844486] [2023-11-19 07:51:35,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:35,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 07:51:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:35,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:51:35,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:51:35,114 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:35,334 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2023-11-19 07:51:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:51:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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 [2023-11-19 07:51:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:35,336 INFO L225 Difference]: With dead ends: 116 [2023-11-19 07:51:35,336 INFO L226 Difference]: Without dead ends: 71 [2023-11-19 07:51:35,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:51:35,337 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:35,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 112 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:51:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-19 07:51:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-11-19 07:51:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2023-11-19 07:51:35,351 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2023-11-19 07:51:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:35,352 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2023-11-19 07:51:35,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2023-11-19 07:51:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 07:51:35,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:35,353 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:35,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:35,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:51:35,554 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:35,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 12 times [2023-11-19 07:51:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:35,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468331006] [2023-11-19 07:51:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 32 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:37,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468331006] [2023-11-19 07:51:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468331006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504302221] [2023-11-19 07:51:37,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:51:37,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:37,534 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:37,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:51:37,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-19 07:51:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:37,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-19 07:51:37,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:37,985 INFO L378 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 19 treesize of output 1 [2023-11-19 07:51:38,002 INFO L378 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 0 case distinctions, treesize of input 31 treesize of output 30 [2023-11-19 07:51:38,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 46 treesize of output 33 [2023-11-19 07:51:38,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-19 07:51:38,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 38 [2023-11-19 07:51:38,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-19 07:51:38,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 38 [2023-11-19 07:51:38,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-19 07:51:38,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 38 [2023-11-19 07:51:38,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-19 07:51:38,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 38 [2023-11-19 07:51:38,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-19 07:51:38,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:38,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 38 [2023-11-19 07:51:38,946 INFO L378 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-19 07:51:39,661 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:39,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-11-19 07:51:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:39,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 42 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:40,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504302221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:40,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:40,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 35, 23] total 69 [2023-11-19 07:51:40,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654000399] [2023-11-19 07:51:40,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:40,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-19 07:51:40,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:40,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-19 07:51:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=4095, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 07:51:40,627 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 69 states, 69 states have (on average 2.7681159420289854) internal successors, (191), 69 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:43,372 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2023-11-19 07:51:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-19 07:51:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.7681159420289854) internal successors, (191), 69 states have internal predecessors, (191), 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 68 [2023-11-19 07:51:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:43,374 INFO L225 Difference]: With dead ends: 88 [2023-11-19 07:51:43,375 INFO L226 Difference]: Without dead ends: 86 [2023-11-19 07:51:43,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1863, Invalid=9909, Unknown=0, NotChecked=0, Total=11772 [2023-11-19 07:51:43,379 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:43,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 313 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:51:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-19 07:51:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2023-11-19 07:51:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2023-11-19 07:51:43,392 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2023-11-19 07:51:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:43,393 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2023-11-19 07:51:43,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.7681159420289854) internal successors, (191), 69 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2023-11-19 07:51:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 07:51:43,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:43,394 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:43,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:43,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:51:43,595 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:43,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 13 times [2023-11-19 07:51:43,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:43,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024303382] [2023-11-19 07:51:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:43,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:43,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024303382] [2023-11-19 07:51:43,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024303382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:43,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869255758] [2023-11-19 07:51:43,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:51:43,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:43,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:43,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:51:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:44,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:51:44,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:44,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 150 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:44,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869255758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:44,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:44,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 30 [2023-11-19 07:51:44,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514701876] [2023-11-19 07:51:44,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:44,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:51:44,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:44,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:51:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=524, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:51:44,682 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:44,889 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2023-11-19 07:51:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:51:44,889 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 72 [2023-11-19 07:51:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:44,890 INFO L225 Difference]: With dead ends: 128 [2023-11-19 07:51:44,890 INFO L226 Difference]: Without dead ends: 79 [2023-11-19 07:51:44,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 125 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=368, Invalid=562, Unknown=0, NotChecked=0, Total=930 [2023-11-19 07:51:44,891 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:44,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 90 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:51:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-19 07:51:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-19 07:51:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2023-11-19 07:51:44,914 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 72 [2023-11-19 07:51:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:44,914 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2023-11-19 07:51:44,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2023-11-19 07:51:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 07:51:44,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:44,915 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:44,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:45,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:51:45,121 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:45,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 14 times [2023-11-19 07:51:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:45,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044417157] [2023-11-19 07:51:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:45,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:46,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044417157] [2023-11-19 07:51:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044417157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646405352] [2023-11-19 07:51:46,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:51:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:46,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:46,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81dd9c12-04da-4c0f-b2c7-b8ae74feb915/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:51:47,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:51:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:47,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-19 07:51:47,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:47,077 INFO L378 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 23 treesize of output 1 [2023-11-19 07:51:47,096 INFO L378 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 0 case distinctions, treesize of input 33 treesize of output 32