./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg60-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg60-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 536af0e32effc3a2288f843fefca54fb0104ab1d17ed14d79ddc92c629dbee95 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:11:20,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:11:20,316 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:11:20,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:11:20,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:11:20,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:11:20,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:11:20,365 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:11:20,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:11:20,371 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:11:20,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:11:20,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:11:20,374 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:11:20,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:11:20,377 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:11:20,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:11:20,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:11:20,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:11:20,378 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:11:20,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:11:20,379 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:11:20,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:11:20,380 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:11:20,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:11:20,381 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:11:20,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:11:20,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:11:20,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:11:20,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:20,384 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:11:20,385 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:11:20,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:11:20,386 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:11:20,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:11:20,386 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:11:20,387 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:11:20,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:11:20,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:11:20,387 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:11:20,388 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_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 536af0e32effc3a2288f843fefca54fb0104ab1d17ed14d79ddc92c629dbee95 [2023-11-06 23:11:20,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:11:20,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:11:20,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:11:20,726 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:11:20,727 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:11:20,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-11-06 23:11:23,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:11:23,992 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:11:23,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-11-06 23:11:24,000 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/data/1aa2d1255/9ea1e66ed50c4e0bb5e72f4a684e11c4/FLAGd274f713d [2023-11-06 23:11:24,022 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/data/1aa2d1255/9ea1e66ed50c4e0bb5e72f4a684e11c4 [2023-11-06 23:11:24,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:11:24,027 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:11:24,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:24,030 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:11:24,036 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:11:24,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547c7188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24, skipping insertion in model container [2023-11-06 23:11:24,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,061 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:11:24,265 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_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/sv-benchmarks/c/reducercommutativity/avg60-1.i[1282,1295] [2023-11-06 23:11:24,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:24,280 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:11:24,302 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_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/sv-benchmarks/c/reducercommutativity/avg60-1.i[1282,1295] [2023-11-06 23:11:24,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:24,319 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:11:24,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24 WrapperNode [2023-11-06 23:11:24,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:24,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:24,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:11:24,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:11:24,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,357 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-06 23:11:24,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:24,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:11:24,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:11:24,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:11:24,368 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,381 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,386 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:11:24,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:11:24,387 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:11:24,387 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:11:24,388 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (1/1) ... [2023-11-06 23:11:24,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:24,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:11:24,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:11:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:11:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:11:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:11:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:11:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-11-06 23:11:24,488 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-11-06 23:11:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:11:24,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:11:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:11:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:11:24,582 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:11:24,584 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:11:24,817 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:11:24,824 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:11:24,824 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:11:24,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:24 BoogieIcfgContainer [2023-11-06 23:11:24,826 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:11:24,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:11:24,830 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:11:24,834 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:11:24,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:11:24" (1/3) ... [2023-11-06 23:11:24,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64565bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:24, skipping insertion in model container [2023-11-06 23:11:24,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:24" (2/3) ... [2023-11-06 23:11:24,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64565bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:24, skipping insertion in model container [2023-11-06 23:11:24,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:24" (3/3) ... [2023-11-06 23:11:24,837 INFO L112 eAbstractionObserver]: Analyzing ICFG avg60-1.i [2023-11-06 23:11:24,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:11:24,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:11:24,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:11:24,925 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6fb5494b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:11:24,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:11:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:11:24,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:24,944 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:24,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:24,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash -864475220, now seen corresponding path program 1 times [2023-11-06 23:11:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:24,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051052183] [2023-11-06 23:11:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:24,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:25,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-06 23:11:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:25,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 23:11:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:25,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 23:11:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:11:25,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051052183] [2023-11-06 23:11:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051052183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283985888] [2023-11-06 23:11:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:25,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:25,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:11:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:25,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:11:25,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:11:25,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283985888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:25,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:25,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-11-06 23:11:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252532043] [2023-11-06 23:11:25,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:25,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:11:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:11:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:11:25,505 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:11:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:25,535 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-11-06 23:11:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:11:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-06 23:11:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:25,581 INFO L225 Difference]: With dead ends: 50 [2023-11-06 23:11:25,595 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 23:11:25,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:11:25,603 INFO L413 NwaCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:25,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 23:11:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 23:11:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-06 23:11:25,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2023-11-06 23:11:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:25,656 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-06 23:11:25,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:11:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-06 23:11:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:11:25,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:25,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:25,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:25,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:11:25,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:25,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1327298342, now seen corresponding path program 1 times [2023-11-06 23:11:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:25,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426344465] [2023-11-06 23:11:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-06 23:11:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 23:11:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 23:11:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:11:26,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:26,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426344465] [2023-11-06 23:11:26,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426344465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:26,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256512141] [2023-11-06 23:11:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:26,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:26,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:26,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:11:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:26,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:11:26,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:26,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256512141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:26,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:26,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 23:11:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29804048] [2023-11-06 23:11:26,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:26,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:26,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:26,290 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:11:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:26,314 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-11-06 23:11:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:26,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-06 23:11:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:26,316 INFO L225 Difference]: With dead ends: 44 [2023-11-06 23:11:26,317 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 23:11:26,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:26,320 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:26,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 23:11:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-06 23:11:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-06 23:11:26,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2023-11-06 23:11:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:26,339 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-06 23:11:26,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:11:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-06 23:11:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 23:11:26,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:26,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:26,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:26,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:26,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:26,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:26,552 INFO L85 PathProgramCache]: Analyzing trace with hash 916084580, now seen corresponding path program 1 times [2023-11-06 23:11:26,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:26,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300971808] [2023-11-06 23:11:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 23:11:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:11:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 23:11:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:11:26,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300971808] [2023-11-06 23:11:26,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300971808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903690030] [2023-11-06 23:11:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:26,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:26,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:26,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:11:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:26,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:11:26,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:26,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903690030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:26,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:26,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 23:11:26,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644584232] [2023-11-06 23:11:26,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:26,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:26,864 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:11:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:26,883 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-11-06 23:11:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:26,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-06 23:11:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:26,885 INFO L225 Difference]: With dead ends: 43 [2023-11-06 23:11:26,886 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 23:11:26,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:26,891 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:26,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 23:11:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-06 23:11:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-06 23:11:26,904 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 31 [2023-11-06 23:11:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:26,904 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-06 23:11:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:11:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-06 23:11:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 23:11:26,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:26,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:26,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:27,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 23:11:27,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:27,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash -456025118, now seen corresponding path program 1 times [2023-11-06 23:11:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332220921] [2023-11-06 23:11:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:27,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 23:11:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-06 23:11:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:11:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332220921] [2023-11-06 23:11:27,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332220921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508907554] [2023-11-06 23:11:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:27,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:27,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:27,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:11:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:27,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 23:11:27,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:27,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508907554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:27,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:27,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-06 23:11:27,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320511495] [2023-11-06 23:11:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:11:27,382 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:11:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:27,397 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-11-06 23:11:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-11-06 23:11:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:27,399 INFO L225 Difference]: With dead ends: 40 [2023-11-06 23:11:27,399 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 23:11:27,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:11:27,401 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:27,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 23:11:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-06 23:11:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-06 23:11:27,407 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 37 [2023-11-06 23:11:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:27,408 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-06 23:11:27,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:11:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-06 23:11:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 23:11:27,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:27,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:27,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:27,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:27,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:27,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1225475744, now seen corresponding path program 1 times [2023-11-06 23:11:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:27,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891513904] [2023-11-06 23:11:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 23:11:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 23:11:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-06 23:11:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 23:11:27,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:27,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891513904] [2023-11-06 23:11:27,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891513904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:27,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025775846] [2023-11-06 23:11:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:27,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:27,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:11:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:27,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:11:27,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:11:27,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:11:28,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025775846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:28,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:28,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-06 23:11:28,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573000728] [2023-11-06 23:11:28,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:28,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:11:28,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:11:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:11:28,010 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:28,067 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-11-06 23:11:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:11:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-11-06 23:11:28,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:28,069 INFO L225 Difference]: With dead ends: 56 [2023-11-06 23:11:28,069 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 23:11:28,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:11:28,071 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:28,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 23:11:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-11-06 23:11:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-11-06 23:11:28,077 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 39 [2023-11-06 23:11:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:28,077 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-11-06 23:11:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-11-06 23:11:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 23:11:28,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:28,080 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:28,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:28,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:28,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:28,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1635191272, now seen corresponding path program 2 times [2023-11-06 23:11:28,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:28,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104629187] [2023-11-06 23:11:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 23:11:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 23:11:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-06 23:11:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-06 23:11:28,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104629187] [2023-11-06 23:11:28,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104629187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401879129] [2023-11-06 23:11:28,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:11:28,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:28,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:28,398 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:28,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:11:28,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:11:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:28,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:11:28,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:11:28,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:11:28,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401879129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:28,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:28,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-06 23:11:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718581971] [2023-11-06 23:11:28,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:11:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:11:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:11:28,658 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 23:11:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:28,745 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-11-06 23:11:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:11:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-11-06 23:11:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:28,748 INFO L225 Difference]: With dead ends: 72 [2023-11-06 23:11:28,748 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 23:11:28,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:11:28,750 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:28,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 161 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:11:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 23:11:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-06 23:11:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-11-06 23:11:28,766 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 51 [2023-11-06 23:11:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:28,766 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-11-06 23:11:28,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 23:11:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-11-06 23:11:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 23:11:28,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:28,768 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:28,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:28,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:11:28,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:28,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1202441462, now seen corresponding path program 3 times [2023-11-06 23:11:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:28,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398500450] [2023-11-06 23:11:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 23:11:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:29,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-06 23:11:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:29,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-06 23:11:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-06 23:11:29,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:29,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398500450] [2023-11-06 23:11:29,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398500450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:29,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302423500] [2023-11-06 23:11:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:11:29,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:29,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:29,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:29,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:11:29,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:11:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:29,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:11:29,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-06 23:11:29,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-06 23:11:29,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302423500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:29,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:29,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-06 23:11:29,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711372820] [2023-11-06 23:11:29,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:29,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:11:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:11:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:11:29,553 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:29,629 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2023-11-06 23:11:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:11:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2023-11-06 23:11:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:29,630 INFO L225 Difference]: With dead ends: 84 [2023-11-06 23:11:29,631 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 23:11:29,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:11:29,632 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:29,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 166 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:11:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 23:11:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-11-06 23:11:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-11-06 23:11:29,640 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 65 [2023-11-06 23:11:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:29,640 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-11-06 23:11:29,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-11-06 23:11:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-06 23:11:29,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:29,642 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:29,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:29,849 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:29,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 830300992, now seen corresponding path program 4 times [2023-11-06 23:11:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:29,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372257246] [2023-11-06 23:11:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:30,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-06 23:11:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:30,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-06 23:11:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-06 23:11:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-06 23:11:30,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:30,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372257246] [2023-11-06 23:11:30,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372257246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:30,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106834958] [2023-11-06 23:11:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:11:30,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:30,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:30,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:11:30,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:11:30,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:30,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:11:30,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-06 23:11:30,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-06 23:11:30,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106834958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:30,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:30,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-06 23:11:30,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966446379] [2023-11-06 23:11:30,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:30,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:11:30,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:30,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:11:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:11:30,860 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:30,954 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2023-11-06 23:11:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:11:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 91 [2023-11-06 23:11:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:30,956 INFO L225 Difference]: With dead ends: 117 [2023-11-06 23:11:30,956 INFO L226 Difference]: Without dead ends: 84 [2023-11-06 23:11:30,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:11:30,958 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:30,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:11:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-06 23:11:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-06 23:11:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2023-11-06 23:11:30,967 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 91 [2023-11-06 23:11:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:30,968 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2023-11-06 23:11:30,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2023-11-06 23:11:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-06 23:11:30,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:30,970 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:30,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:31,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:31,177 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:31,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -693469466, now seen corresponding path program 5 times [2023-11-06 23:11:31,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:31,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826026096] [2023-11-06 23:11:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:31,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-06 23:11:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:32,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:11:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-11-06 23:11:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-06 23:11:32,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:32,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826026096] [2023-11-06 23:11:32,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826026096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:32,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151274918] [2023-11-06 23:11:32,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:11:32,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:32,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:32,277 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:32,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:11:36,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-06 23:11:36,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:36,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:11:36,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2023-11-06 23:11:36,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-06 23:11:36,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151274918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:36,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:36,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2023-11-06 23:11:36,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020979935] [2023-11-06 23:11:36,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:36,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 23:11:36,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 23:11:36,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 23:11:36,521 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 41 states have internal predecessors, (106), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:36,716 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2023-11-06 23:11:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 23:11:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 41 states have internal predecessors, (106), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 117 [2023-11-06 23:11:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:36,718 INFO L225 Difference]: With dead ends: 136 [2023-11-06 23:11:36,718 INFO L226 Difference]: Without dead ends: 103 [2023-11-06 23:11:36,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 23:11:36,720 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:36,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:11:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-06 23:11:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2023-11-06 23:11:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2023-11-06 23:11:36,731 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 117 [2023-11-06 23:11:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:36,732 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2023-11-06 23:11:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 41 states have internal predecessors, (106), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:36,733 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2023-11-06 23:11:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 23:11:36,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:36,735 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:36,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:36,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:36,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:36,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1763462380, now seen corresponding path program 6 times [2023-11-06 23:11:36,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:36,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550522233] [2023-11-06 23:11:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:36,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:38,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-06 23:11:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:38,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-06 23:11:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:38,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-06 23:11:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2023-11-06 23:11:38,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550522233] [2023-11-06 23:11:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550522233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:38,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305288806] [2023-11-06 23:11:38,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:11:38,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:38,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:38,262 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:38,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:11:38,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 23:11:38,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:38,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:11:38,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 850 proven. 4 refuted. 0 times theorem prover too weak. 1638 trivial. 0 not checked. [2023-11-06 23:11:38,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2488 trivial. 0 not checked. [2023-11-06 23:11:38,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305288806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:38,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:38,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2023-11-06 23:11:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872215580] [2023-11-06 23:11:38,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 23:11:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 23:11:38,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 23:11:38,835 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:38,983 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2023-11-06 23:11:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:11:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 167 [2023-11-06 23:11:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:38,985 INFO L225 Difference]: With dead ends: 162 [2023-11-06 23:11:38,985 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 23:11:38,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 23:11:38,987 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:38,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:11:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 23:11:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-11-06 23:11:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2023-11-06 23:11:39,007 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 167 [2023-11-06 23:11:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:39,007 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2023-11-06 23:11:39,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2023-11-06 23:11:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-06 23:11:39,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:39,010 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:39,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:39,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:11:39,216 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:39,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1466673462, now seen corresponding path program 7 times [2023-11-06 23:11:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:39,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970459175] [2023-11-06 23:11:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-06 23:11:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:40,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-06 23:11:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:40,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-06 23:11:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2575 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-11-06 23:11:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:40,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970459175] [2023-11-06 23:11:40,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970459175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:40,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955081092] [2023-11-06 23:11:40,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:11:40,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:40,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:40,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:11:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:40,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 23:11:40,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2575 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-11-06 23:11:40,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2575 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-11-06 23:11:42,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955081092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:42,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:42,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-11-06 23:11:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535673153] [2023-11-06 23:11:42,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:42,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-06 23:11:42,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:42,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-06 23:11:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 23:11:42,111 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:42,322 INFO L93 Difference]: Finished difference Result 225 states and 260 transitions. [2023-11-06 23:11:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 23:11:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 177 [2023-11-06 23:11:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:42,325 INFO L225 Difference]: With dead ends: 225 [2023-11-06 23:11:42,326 INFO L226 Difference]: Without dead ends: 168 [2023-11-06 23:11:42,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 23:11:42,329 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:42,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:11:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-06 23:11:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-06 23:11:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2023-11-06 23:11:42,359 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 177 [2023-11-06 23:11:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:42,361 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2023-11-06 23:11:42,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2023-11-06 23:11:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-11-06 23:11:42,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:42,367 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:42,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:42,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:11:42,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:42,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:42,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1583057262, now seen corresponding path program 8 times [2023-11-06 23:11:42,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:42,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956703812] [2023-11-06 23:11:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:42,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-06 23:11:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:46,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-06 23:11:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:46,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2023-11-06 23:11:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4815 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-11-06 23:11:46,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956703812] [2023-11-06 23:11:46,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956703812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598720979] [2023-11-06 23:11:46,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:11:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:46,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:46,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:46,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:11:46,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:11:46,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:46,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 23:11:46,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4815 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-11-06 23:11:46,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4815 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-11-06 23:11:48,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598720979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:48,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:48,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2023-11-06 23:11:48,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963058921] [2023-11-06 23:11:48,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:48,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-06 23:11:48,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-06 23:11:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 23:11:48,721 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 63 states, 63 states have (on average 2.3492063492063493) internal successors, (148), 63 states have internal predecessors, (148), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:48,938 INFO L93 Difference]: Finished difference Result 237 states and 250 transitions. [2023-11-06 23:11:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-06 23:11:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3492063492063493) internal successors, (148), 63 states have internal predecessors, (148), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 233 [2023-11-06 23:11:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:48,941 INFO L225 Difference]: With dead ends: 237 [2023-11-06 23:11:48,941 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 23:11:48,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 416 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 23:11:48,945 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:48,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 135 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:11:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 23:11:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-06 23:11:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0171428571428571) internal successors, (178), 175 states have internal predecessors, (178), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2023-11-06 23:11:48,956 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 233 [2023-11-06 23:11:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:48,959 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2023-11-06 23:11:48,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3492063492063493) internal successors, (148), 63 states have internal predecessors, (148), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:11:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2023-11-06 23:11:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 23:11:48,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:48,963 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:48,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:49,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:11:49,177 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:49,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:49,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1387080070, now seen corresponding path program 9 times [2023-11-06 23:11:49,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:49,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122390116] [2023-11-06 23:11:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:49,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:49,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-06 23:11:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:50,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2023-11-06 23:11:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:50,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-11-06 23:11:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 4455 trivial. 0 not checked. [2023-11-06 23:11:50,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:50,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122390116] [2023-11-06 23:11:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122390116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493815578] [2023-11-06 23:11:50,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:11:50,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:50,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:50,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:50,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:11:50,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-06 23:11:50,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:50,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:11:50,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 4613 trivial. 0 not checked. [2023-11-06 23:11:50,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2023-11-06 23:11:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493815578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:50,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:50,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-11-06 23:11:50,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856049587] [2023-11-06 23:11:50,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:50,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:11:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:11:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:11:50,915 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:51,023 INFO L93 Difference]: Finished difference Result 254 states and 272 transitions. [2023-11-06 23:11:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:11:51,023 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 245 [2023-11-06 23:11:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:51,025 INFO L225 Difference]: With dead ends: 254 [2023-11-06 23:11:51,026 INFO L226 Difference]: Without dead ends: 199 [2023-11-06 23:11:51,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:11:51,027 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:51,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 168 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:11:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-06 23:11:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2023-11-06 23:11:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 193 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2023-11-06 23:11:51,039 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 245 [2023-11-06 23:11:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:51,040 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2023-11-06 23:11:51,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2023-11-06 23:11:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-06 23:11:51,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:51,045 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:51,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:51,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:11:51,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:51,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1212505204, now seen corresponding path program 10 times [2023-11-06 23:11:51,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:51,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664896258] [2023-11-06 23:11:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:51,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:51,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-06 23:11:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-06 23:11:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:52,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2023-11-06 23:11:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5926 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 4733 trivial. 0 not checked. [2023-11-06 23:11:52,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664896258] [2023-11-06 23:11:52,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664896258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120404295] [2023-11-06 23:11:52,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:11:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:52,243 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:11:52,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:11:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:52,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:11:52,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5926 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 4733 trivial. 0 not checked. [2023-11-06 23:11:52,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5926 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 4733 trivial. 0 not checked. [2023-11-06 23:11:53,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120404295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:53,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:53,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-06 23:11:53,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883086748] [2023-11-06 23:11:53,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 23:11:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 23:11:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 23:11:53,212 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:53,331 INFO L93 Difference]: Finished difference Result 305 states and 331 transitions. [2023-11-06 23:11:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:11:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 267 [2023-11-06 23:11:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:53,333 INFO L225 Difference]: With dead ends: 305 [2023-11-06 23:11:53,334 INFO L226 Difference]: Without dead ends: 232 [2023-11-06 23:11:53,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 23:11:53,335 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:53,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 163 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:11:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-06 23:11:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2023-11-06 23:11:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:11:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2023-11-06 23:11:53,348 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 267 [2023-11-06 23:11:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:53,349 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2023-11-06 23:11:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2023-11-06 23:11:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-06 23:11:53,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:53,356 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:53,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:53,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:11:53,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:53,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -457180462, now seen corresponding path program 11 times [2023-11-06 23:11:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:53,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32173445] [2023-11-06 23:11:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:53,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:55,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-06 23:11:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:55,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-11-06 23:11:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:55,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2023-11-06 23:11:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13219 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 7963 trivial. 0 not checked. [2023-11-06 23:11:55,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32173445] [2023-11-06 23:11:55,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32173445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209593898] [2023-11-06 23:11:55,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:11:55,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:55,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6d35f2-3a9d-4206-b220-f488eb5bd6f1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process