./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/loopv3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/loopv3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dde080b2b1290163775d8fea1546e1b21e5d1f7776ff175b316d8ca2be5d0863 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:10:56,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:10:56,337 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:10:56,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:10:56,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:10:56,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:10:56,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:10:56,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:10:56,374 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:10:56,374 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:10:56,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:10:56,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:10:56,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:10:56,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:10:56,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:10:56,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:10:56,378 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:10:56,379 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:10:56,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:10:56,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:10:56,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:10:56,381 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:10:56,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:10:56,382 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:10:56,382 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:10:56,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:10:56,397 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:10:56,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:10:56,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:10:56,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:10:56,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:10:56,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:10:56,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:10:56,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:10:56,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:10:56,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:10:56,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:10:56,401 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:10:56,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:10:56,402 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:10:56,402 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:10:56,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:10:56,403 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_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dde080b2b1290163775d8fea1546e1b21e5d1f7776ff175b316d8ca2be5d0863 [2023-11-29 04:10:56,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:10:56,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:10:56,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:10:56,678 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:10:56,679 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:10:56,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops-crafted-1/loopv3.c [2023-11-29 04:10:59,451 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:10:59,655 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:10:59,655 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/sv-benchmarks/c/loops-crafted-1/loopv3.c [2023-11-29 04:10:59,662 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/data/3209806e9/07a7826e1ee4457ab221cad633232167/FLAG34703c4e2 [2023-11-29 04:10:59,677 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/data/3209806e9/07a7826e1ee4457ab221cad633232167 [2023-11-29 04:10:59,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:10:59,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:10:59,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:10:59,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:10:59,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:10:59,689 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,690 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ca74f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59, skipping insertion in model container [2023-11-29 04:10:59,690 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,711 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:10:59,863 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_518e48cf-6f11-464f-a6da-bb964618cb3a/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] [2023-11-29 04:10:59,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:10:59,884 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:10:59,896 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_518e48cf-6f11-464f-a6da-bb964618cb3a/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] [2023-11-29 04:10:59,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:10:59,914 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:10:59,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59 WrapperNode [2023-11-29 04:10:59,914 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:10:59,915 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:10:59,916 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:10:59,916 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:10:59,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,947 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2023-11-29 04:10:59,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:10:59,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:10:59,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:10:59,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:10:59,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,961 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,972 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 04:10:59,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:10:59,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:10:59,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:10:59,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:10:59,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (1/1) ... [2023-11-29 04:10:59,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:11:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:00,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:11:00,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:11:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:11:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:11:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:11:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:11:00,106 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:11:00,108 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:11:00,235 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:11:00,257 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:11:00,258 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 04:11:00,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:11:00 BoogieIcfgContainer [2023-11-29 04:11:00,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:11:00,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:11:00,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:11:00,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:11:00,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:10:59" (1/3) ... [2023-11-29 04:11:00,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c66fa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:11:00, skipping insertion in model container [2023-11-29 04:11:00,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:10:59" (2/3) ... [2023-11-29 04:11:00,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c66fa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:11:00, skipping insertion in model container [2023-11-29 04:11:00,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:11:00" (3/3) ... [2023-11-29 04:11:00,266 INFO L112 eAbstractionObserver]: Analyzing ICFG loopv3.c [2023-11-29 04:11:00,281 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:11:00,281 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:11:00,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:11:00,326 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1dc6b4d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:11:00,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:11:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 04:11:00,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:00,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 04:11:00,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:00,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash 63386408, now seen corresponding path program 1 times [2023-11-29 04:11:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:00,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959422663] [2023-11-29 04:11:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:00,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:00,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:00,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959422663] [2023-11-29 04:11:00,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959422663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:00,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:00,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:11:00,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046547748] [2023-11-29 04:11:00,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:00,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:11:00,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:00,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:11:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:11:00,493 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:00,509 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2023-11-29 04:11:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:11:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 04:11:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:00,518 INFO L225 Difference]: With dead ends: 15 [2023-11-29 04:11:00,518 INFO L226 Difference]: Without dead ends: 7 [2023-11-29 04:11:00,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:11:00,523 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:00,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:11:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-29 04:11:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-29 04:11:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2023-11-29 04:11:00,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2023-11-29 04:11:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:00,546 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2023-11-29 04:11:00,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2023-11-29 04:11:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 04:11:00,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:00,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 04:11:00,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:11:00,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:00,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash 63088498, now seen corresponding path program 1 times [2023-11-29 04:11:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:00,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727141281] [2023-11-29 04:11:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727141281] [2023-11-29 04:11:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727141281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:00,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:00,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:11:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627241499] [2023-11-29 04:11:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:00,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:11:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:11:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:11:00,655 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:00,674 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2023-11-29 04:11:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:11:00,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 04:11:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:00,678 INFO L225 Difference]: With dead ends: 13 [2023-11-29 04:11:00,678 INFO L226 Difference]: Without dead ends: 9 [2023-11-29 04:11:00,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:11:00,680 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:00,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:11:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-29 04:11:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-29 04:11:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-11-29 04:11:00,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-11-29 04:11:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:00,686 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-11-29 04:11:00,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-11-29 04:11:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 04:11:00,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:00,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:00,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:11:00,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:00,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash 550694231, now seen corresponding path program 1 times [2023-11-29 04:11:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:00,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976034559] [2023-11-29 04:11:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:00,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:00,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:00,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976034559] [2023-11-29 04:11:00,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976034559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:00,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916434496] [2023-11-29 04:11:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:00,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:00,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:00,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:11:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:00,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:11:00,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:00,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:00,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916434496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:00,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:00,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-29 04:11:00,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482945369] [2023-11-29 04:11:00,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:11:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:00,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:11:00,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:11:00,956 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:00,996 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-11-29 04:11:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:11:00,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 04:11:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:00,997 INFO L225 Difference]: With dead ends: 18 [2023-11-29 04:11:00,997 INFO L226 Difference]: Without dead ends: 14 [2023-11-29 04:11:00,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:11:00,999 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:01,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:11:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-29 04:11:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-29 04:11:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2023-11-29 04:11:01,005 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 7 [2023-11-29 04:11:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:01,005 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2023-11-29 04:11:01,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2023-11-29 04:11:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 04:11:01,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:01,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-29 04:11:01,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:11:01,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:01,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:01,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash -788486024, now seen corresponding path program 1 times [2023-11-29 04:11:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:01,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852935679] [2023-11-29 04:11:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852935679] [2023-11-29 04:11:01,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852935679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:01,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430805181] [2023-11-29 04:11:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:01,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:01,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:01,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:01,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:11:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:01,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:11:01,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:01,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:01,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430805181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:01,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:01,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 04:11:01,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332926011] [2023-11-29 04:11:01,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:01,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:11:01,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:11:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:11:01,461 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:01,514 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2023-11-29 04:11:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:11:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 04:11:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:01,516 INFO L225 Difference]: With dead ends: 28 [2023-11-29 04:11:01,516 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 04:11:01,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:11:01,517 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:01,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:11:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 04:11:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-11-29 04:11:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-29 04:11:01,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2023-11-29 04:11:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:01,524 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-29 04:11:01,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-29 04:11:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 04:11:01,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:01,526 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2023-11-29 04:11:01,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 04:11:01,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:01,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:01,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1746265072, now seen corresponding path program 2 times [2023-11-29 04:11:01,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354383024] [2023-11-29 04:11:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:01,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354383024] [2023-11-29 04:11:01,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354383024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461221530] [2023-11-29 04:11:01,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:11:01,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:01,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:01,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:01,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:11:02,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:11:02,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:02,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:11:02,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:02,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:02,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461221530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:02,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:02,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-29 04:11:02,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363463652] [2023-11-29 04:11:02,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:02,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:11:02,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:11:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=268, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:11:02,275 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:02,390 INFO L93 Difference]: Finished difference Result 60 states and 90 transitions. [2023-11-29 04:11:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:11:02,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 04:11:02,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:02,393 INFO L225 Difference]: With dead ends: 60 [2023-11-29 04:11:02,393 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 04:11:02,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=268, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:11:02,394 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:02,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:11:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 04:11:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2023-11-29 04:11:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2023-11-29 04:11:02,405 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 17 [2023-11-29 04:11:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:02,405 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2023-11-29 04:11:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2023-11-29 04:11:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 04:11:02,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:02,407 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1] [2023-11-29 04:11:02,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:11:02,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:02,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:02,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash 174531214, now seen corresponding path program 1 times [2023-11-29 04:11:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:02,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913619945] [2023-11-29 04:11:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:02,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:02,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913619945] [2023-11-29 04:11:02,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913619945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751522703] [2023-11-29 04:11:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:02,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:02,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:02,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:11:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:02,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:11:02,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:03,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:03,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751522703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:03,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:03,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-29 04:11:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556357899] [2023-11-29 04:11:03,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:03,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:11:03,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:11:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=434, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:11:03,213 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:03,344 INFO L93 Difference]: Finished difference Result 118 states and 178 transitions. [2023-11-29 04:11:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:11:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 04:11:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:03,347 INFO L225 Difference]: With dead ends: 118 [2023-11-29 04:11:03,347 INFO L226 Difference]: Without dead ends: 114 [2023-11-29 04:11:03,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=434, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:11:03,348 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:03,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:11:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-29 04:11:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 42. [2023-11-29 04:11:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2023-11-29 04:11:03,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 21 [2023-11-29 04:11:03,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:03,364 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2023-11-29 04:11:03,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:03,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2023-11-29 04:11:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 04:11:03,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:03,365 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 4, 1, 1, 1, 1, 1] [2023-11-29 04:11:03,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:11:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:11:03,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:03,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash -114266064, now seen corresponding path program 2 times [2023-11-29 04:11:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046020868] [2023-11-29 04:11:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:03,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:03,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046020868] [2023-11-29 04:11:03,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046020868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469275480] [2023-11-29 04:11:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:11:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:03,849 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:03,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:11:03,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:11:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:03,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:11:03,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:04,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:04,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469275480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:04,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:04,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-11-29 04:11:04,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747256195] [2023-11-29 04:11:04,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:04,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 04:11:04,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 04:11:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:11:04,678 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:04,889 INFO L93 Difference]: Finished difference Result 264 states and 400 transitions. [2023-11-29 04:11:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:11:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 04:11:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:04,892 INFO L225 Difference]: With dead ends: 264 [2023-11-29 04:11:04,892 INFO L226 Difference]: Without dead ends: 260 [2023-11-29 04:11:04,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:11:04,895 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:04,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:11:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-29 04:11:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 66. [2023-11-29 04:11:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.476923076923077) internal successors, (96), 65 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2023-11-29 04:11:04,922 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 33 [2023-11-29 04:11:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:04,923 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2023-11-29 04:11:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2023-11-29 04:11:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 04:11:04,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:04,925 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 6, 1, 1, 1, 1, 1] [2023-11-29 04:11:04,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:11:05,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:11:05,129 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:05,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:05,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1105070284, now seen corresponding path program 3 times [2023-11-29 04:11:05,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:05,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276848274] [2023-11-29 04:11:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:05,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:05,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:05,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276848274] [2023-11-29 04:11:05,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276848274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:05,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463081910] [2023-11-29 04:11:05,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:11:05,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:05,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:05,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:11:05,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-29 04:11:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:05,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 04:11:05,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:05,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:06,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463081910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:06,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:06,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-11-29 04:11:06,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86292839] [2023-11-29 04:11:06,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:06,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 04:11:06,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:06,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 04:11:06,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1558, Invalid=1864, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 04:11:06,504 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:06,808 INFO L93 Difference]: Finished difference Result 508 states and 768 transitions. [2023-11-29 04:11:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 04:11:06,808 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-29 04:11:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:06,812 INFO L225 Difference]: With dead ends: 508 [2023-11-29 04:11:06,812 INFO L226 Difference]: Without dead ends: 504 [2023-11-29 04:11:06,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1558, Invalid=1864, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 04:11:06,815 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:06,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:11:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-11-29 04:11:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 82. [2023-11-29 04:11:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 81 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 120 transitions. [2023-11-29 04:11:06,854 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 120 transitions. Word has length 41 [2023-11-29 04:11:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:06,854 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 120 transitions. [2023-11-29 04:11:06,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 120 transitions. [2023-11-29 04:11:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 04:11:06,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:06,857 INFO L195 NwaCegarLoop]: trace histogram [30, 22, 8, 1, 1, 1, 1, 1] [2023-11-29 04:11:06,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:11:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:07,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:07,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -787271048, now seen corresponding path program 4 times [2023-11-29 04:11:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:07,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452211086] [2023-11-29 04:11:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:07,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:07,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452211086] [2023-11-29 04:11:07,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452211086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140473379] [2023-11-29 04:11:07,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:11:07,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:07,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:07,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:11:07,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:11:07,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:07,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 04:11:07,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:08,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:09,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140473379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:09,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:09,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2023-11-29 04:11:09,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860385113] [2023-11-29 04:11:09,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:09,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-29 04:11:09,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-29 04:11:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4030, Invalid=4900, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 04:11:09,799 INFO L87 Difference]: Start difference. First operand 82 states and 120 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:10,329 INFO L93 Difference]: Finished difference Result 1052 states and 1590 transitions. [2023-11-29 04:11:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 04:11:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 04:11:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:10,334 INFO L225 Difference]: With dead ends: 1052 [2023-11-29 04:11:10,334 INFO L226 Difference]: Without dead ends: 1048 [2023-11-29 04:11:10,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4030, Invalid=4900, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 04:11:10,338 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:10,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:11:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2023-11-29 04:11:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 130. [2023-11-29 04:11:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.4883720930232558) internal successors, (192), 129 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 192 transitions. [2023-11-29 04:11:10,406 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 192 transitions. Word has length 65 [2023-11-29 04:11:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:10,407 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 192 transitions. [2023-11-29 04:11:10,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 192 transitions. [2023-11-29 04:11:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 04:11:10,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:10,409 INFO L195 NwaCegarLoop]: trace histogram [36, 26, 10, 1, 1, 1, 1, 1] [2023-11-29 04:11:10,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:11:10,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:10,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:10,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:10,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1006131214, now seen corresponding path program 5 times [2023-11-29 04:11:10,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:10,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256086910] [2023-11-29 04:11:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:10,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:11,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:11,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256086910] [2023-11-29 04:11:11,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256086910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:11,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296170606] [2023-11-29 04:11:11,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:11:11,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:11,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:11,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:11,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:11:11,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-11-29 04:11:11,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:11,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 04:11:11,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:12,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:14,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296170606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:14,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:14,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2023-11-29 04:11:14,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389506235] [2023-11-29 04:11:14,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:14,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-29 04:11:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:14,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-29 04:11:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5698, Invalid=6958, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 04:11:14,302 INFO L87 Difference]: Start difference. First operand 130 states and 192 transitions. Second operand has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:15,655 INFO L93 Difference]: Finished difference Result 2557 states and 3848 transitions. [2023-11-29 04:11:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 04:11:15,655 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-11-29 04:11:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:15,670 INFO L225 Difference]: With dead ends: 2557 [2023-11-29 04:11:15,670 INFO L226 Difference]: Without dead ends: 2553 [2023-11-29 04:11:15,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5363 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5698, Invalid=6958, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 04:11:15,677 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:15,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:11:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2023-11-29 04:11:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 306. [2023-11-29 04:11:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.4950819672131148) internal successors, (456), 305 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 456 transitions. [2023-11-29 04:11:15,912 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 456 transitions. Word has length 77 [2023-11-29 04:11:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:15,912 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 456 transitions. [2023-11-29 04:11:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 456 transitions. [2023-11-29 04:11:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 04:11:15,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:15,915 INFO L195 NwaCegarLoop]: trace histogram [54, 33, 21, 1, 1, 1, 1, 1] [2023-11-29 04:11:15,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:11:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:11:16,116 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:16,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash -355170858, now seen corresponding path program 6 times [2023-11-29 04:11:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732332183] [2023-11-29 04:11:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:18,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:18,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732332183] [2023-11-29 04:11:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732332183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:18,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790047233] [2023-11-29 04:11:18,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:11:18,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:18,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:18,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:18,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:11:18,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2023-11-29 04:11:18,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:18,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 04:11:18,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:19,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:23,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790047233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:23,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2023-11-29 04:11:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391562119] [2023-11-29 04:11:23,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:23,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2023-11-29 04:11:23,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2023-11-29 04:11:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12430, Invalid=15292, Unknown=0, NotChecked=0, Total=27722 [2023-11-29 04:11:23,155 INFO L87 Difference]: Start difference. First operand 306 states and 456 transitions. Second operand has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:27,705 INFO L93 Difference]: Finished difference Result 5260 states and 7912 transitions. [2023-11-29 04:11:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 04:11:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-11-29 04:11:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:27,731 INFO L225 Difference]: With dead ends: 5260 [2023-11-29 04:11:27,731 INFO L226 Difference]: Without dead ends: 5256 [2023-11-29 04:11:27,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11933 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=12430, Invalid=15292, Unknown=0, NotChecked=0, Total=27722 [2023-11-29 04:11:27,738 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:27,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:11:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2023-11-29 04:11:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 226. [2023-11-29 04:11:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4933333333333334) internal successors, (336), 225 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 336 transitions. [2023-11-29 04:11:28,241 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 336 transitions. Word has length 113 [2023-11-29 04:11:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:28,242 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 336 transitions. [2023-11-29 04:11:28,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 336 transitions. [2023-11-29 04:11:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-29 04:11:28,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:28,243 INFO L195 NwaCegarLoop]: trace histogram [70, 40, 30, 1, 1, 1, 1, 1] [2023-11-29 04:11:28,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 04:11:28,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:28,444 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:28,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1202445568, now seen corresponding path program 7 times [2023-11-29 04:11:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:28,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305116506] [2023-11-29 04:11:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:31,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:31,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305116506] [2023-11-29 04:11:31,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305116506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:31,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336422811] [2023-11-29 04:11:31,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:11:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:31,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:31,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:11:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:31,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 04:11:31,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:33,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:39,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336422811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:39,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:39,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 214 [2023-11-29 04:11:39,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266897577] [2023-11-29 04:11:39,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:39,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2023-11-29 04:11:39,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2023-11-29 04:11:39,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20590, Invalid=25420, Unknown=0, NotChecked=0, Total=46010 [2023-11-29 04:11:39,427 INFO L87 Difference]: Start difference. First operand 226 states and 336 transitions. Second operand has 215 states, 215 states have (on average 1.9953488372093022) internal successors, (429), 214 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:54,382 INFO L93 Difference]: Finished difference Result 8261 states and 12421 transitions. [2023-11-29 04:11:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-11-29 04:11:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 1.9953488372093022) internal successors, (429), 214 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-29 04:11:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:54,424 INFO L225 Difference]: With dead ends: 8261 [2023-11-29 04:11:54,424 INFO L226 Difference]: Without dead ends: 8257 [2023-11-29 04:11:54,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19949 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=20590, Invalid=25420, Unknown=0, NotChecked=0, Total=46010 [2023-11-29 04:11:54,431 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:54,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:11:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2023-11-29 04:11:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 566. [2023-11-29 04:11:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.497345132743363) internal successors, (846), 565 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 846 transitions. [2023-11-29 04:11:56,469 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 846 transitions. Word has length 145 [2023-11-29 04:11:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:56,470 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 846 transitions. [2023-11-29 04:11:56,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 1.9953488372093022) internal successors, (429), 214 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 846 transitions. [2023-11-29 04:11:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-29 04:11:56,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:56,473 INFO L195 NwaCegarLoop]: trace histogram [82, 61, 21, 1, 1, 1, 1, 1] [2023-11-29 04:11:56,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 04:11:56,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:56,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:56,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:56,674 INFO L85 PathProgramCache]: Analyzing trace with hash -509743726, now seen corresponding path program 8 times [2023-11-29 04:11:56,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:56,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146190675] [2023-11-29 04:11:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:56,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146190675] [2023-11-29 04:12:00,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146190675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:12:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868176242] [2023-11-29 04:12:00,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:12:00,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:00,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:12:00,684 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:12:00,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:12:00,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:12:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:12:00,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-29 04:12:00,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:12:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:03,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:12:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:11,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868176242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:12:11,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:12:11,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 250 [2023-11-29 04:12:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256259263] [2023-11-29 04:12:11,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:12:11,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 251 states [2023-11-29 04:12:11,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2023-11-29 04:12:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28054, Invalid=34696, Unknown=0, NotChecked=0, Total=62750 [2023-11-29 04:12:11,294 INFO L87 Difference]: Start difference. First operand 566 states and 846 transitions. Second operand has 251 states, 251 states have (on average 1.99601593625498) internal successors, (501), 250 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:05,187 INFO L93 Difference]: Finished difference Result 17372 states and 26094 transitions. [2023-11-29 04:13:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2023-11-29 04:13:05,188 INFO L78 Accepts]: Start accepts. Automaton has has 251 states, 251 states have (on average 1.99601593625498) internal successors, (501), 250 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2023-11-29 04:13:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:05,235 INFO L225 Difference]: With dead ends: 17372 [2023-11-29 04:13:05,235 INFO L226 Difference]: Without dead ends: 17368 [2023-11-29 04:13:05,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27305 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=28054, Invalid=34696, Unknown=0, NotChecked=0, Total=62750 [2023-11-29 04:13:05,249 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:05,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:13:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17368 states. [2023-11-29 04:13:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17368 to 338. [2023-11-29 04:13:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.4955489614243322) internal successors, (504), 337 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 504 transitions. [2023-11-29 04:13:08,547 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 504 transitions. Word has length 169 [2023-11-29 04:13:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:08,548 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 504 transitions. [2023-11-29 04:13:08,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 251 states, 251 states have (on average 1.99601593625498) internal successors, (501), 250 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 504 transitions. [2023-11-29 04:13:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-11-29 04:13:08,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:08,552 INFO L195 NwaCegarLoop]: trace histogram [138, 110, 28, 1, 1, 1, 1, 1] [2023-11-29 04:13:08,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:13:08,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:08,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:08,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash 792247404, now seen corresponding path program 9 times [2023-11-29 04:13:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:08,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973580750] [2023-11-29 04:13:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 0 proven. 19044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973580750] [2023-11-29 04:13:18,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973580750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:13:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632110648] [2023-11-29 04:13:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:13:18,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:18,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:18,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:13:19,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 139 check-sat command(s) [2023-11-29 04:13:19,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:13:19,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 141 conjunts are in the unsatisfiable core [2023-11-29 04:13:19,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 0 proven. 19044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:27,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 0 proven. 19044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632110648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:47,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:13:47,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140, 140] total 418 [2023-11-29 04:13:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629852349] [2023-11-29 04:13:47,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:47,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2023-11-29 04:13:47,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2023-11-29 04:13:47,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78118, Invalid=97024, Unknown=0, NotChecked=0, Total=175142 [2023-11-29 04:13:47,294 INFO L87 Difference]: Start difference. First operand 338 states and 504 transitions. Second operand has 419 states, 419 states have (on average 1.9976133651551313) internal successors, (837), 418 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:16:55,921 INFO L93 Difference]: Finished difference Result 23774 states and 35725 transitions. [2023-11-29 04:16:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2023-11-29 04:16:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 419 states, 419 states have (on average 1.9976133651551313) internal successors, (837), 418 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2023-11-29 04:16:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:16:55,954 INFO L225 Difference]: With dead ends: 23774 [2023-11-29 04:16:55,954 INFO L226 Difference]: Without dead ends: 23770 [2023-11-29 04:16:55,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76865 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=78118, Invalid=97024, Unknown=0, NotChecked=0, Total=175142 [2023-11-29 04:16:55,976 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:16:55,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 04:16:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23770 states. [2023-11-29 04:17:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23770 to 562. [2023-11-29 04:17:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 1.4973262032085561) internal successors, (840), 561 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 840 transitions. [2023-11-29 04:17:08,613 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 840 transitions. Word has length 281 [2023-11-29 04:17:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:17:08,613 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 840 transitions. [2023-11-29 04:17:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 419 states, 419 states have (on average 1.9976133651551313) internal successors, (837), 418 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 840 transitions. [2023-11-29 04:17:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-29 04:17:08,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:17:08,618 INFO L195 NwaCegarLoop]: trace histogram [150, 128, 22, 1, 1, 1, 1, 1] [2023-11-29 04:17:08,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:17:08,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:08,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:17:08,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:17:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1496493088, now seen corresponding path program 10 times [2023-11-29 04:17:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:17:08,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043737361] [2023-11-29 04:17:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:17:08,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:17:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:17:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 0 proven. 22500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:17:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043737361] [2023-11-29 04:17:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043737361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:17:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411476923] [2023-11-29 04:17:19,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:17:19,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:19,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:17:19,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:17:19,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518e48cf-6f11-464f-a6da-bb964618cb3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:17:20,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:17:20,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:17:20,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 153 conjunts are in the unsatisfiable core [2023-11-29 04:17:20,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:17:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 0 proven. 22500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:29,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:17:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 0 proven. 22500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411476923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:17:53,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:17:53,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152, 152] total 454 [2023-11-29 04:17:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119643513] [2023-11-29 04:17:53,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:17:53,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 455 states [2023-11-29 04:17:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:17:53,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 455 interpolants. [2023-11-29 04:17:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92110, Invalid=114460, Unknown=0, NotChecked=0, Total=206570 [2023-11-29 04:17:53,106 INFO L87 Difference]: Start difference. First operand 562 states and 840 transitions. Second operand has 455 states, 455 states have (on average 1.9978021978021978) internal successors, (909), 454 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)