./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7520cfa04676a157cc3b0d71c42a9ed73acdf0d120a939e33f1a3e61a093ef11 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:30,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:30,653 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-19 07:35:30,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:30,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:30,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:30,708 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:30,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:30,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:30,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:30,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:30,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:30,720 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:30,722 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:30,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:30,723 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:30,724 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:30,724 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:30,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:30,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:30,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:30,727 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:30,728 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:30,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:30,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:30,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:30,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:30,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:30,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:30,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:30,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:30,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:30,734 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:30,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:30,735 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:30,735 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:30,736 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_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7520cfa04676a157cc3b0d71c42a9ed73acdf0d120a939e33f1a3e61a093ef11 [2023-11-19 07:35:31,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:31,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:31,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:31,109 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:31,110 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:31,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c [2023-11-19 07:35:34,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:34,548 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:34,549 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c [2023-11-19 07:35:34,558 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/data/e5599f807/88f8e4813949402cbd54562cbe35db1d/FLAGf5ab29cc3 [2023-11-19 07:35:34,578 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/data/e5599f807/88f8e4813949402cbd54562cbe35db1d [2023-11-19 07:35:34,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:34,583 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:34,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:34,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:34,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:34,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40418478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34, skipping insertion in model container [2023-11-19 07:35:34,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:34,767 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_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c[1256,1269] [2023-11-19 07:35:34,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:34,805 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:34,819 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_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c[1256,1269] [2023-11-19 07:35:34,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:34,847 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:34,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34 WrapperNode [2023-11-19 07:35:34,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:34,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:34,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:34,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:34,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,895 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-19 07:35:34,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:34,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:34,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:34,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:34,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,932 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,937 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:34,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:34,944 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:34,944 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:34,945 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (1/1) ... [2023-11-19 07:35:34,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:34,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:34,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:35,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:35,129 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:35,132 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:35,376 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:35,383 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:35,384 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:35:35,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:35 BoogieIcfgContainer [2023-11-19 07:35:35,388 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:35,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:35,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:35,395 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:35,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:34" (1/3) ... [2023-11-19 07:35:35,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783e3b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:35, skipping insertion in model container [2023-11-19 07:35:35,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:34" (2/3) ... [2023-11-19 07:35:35,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783e3b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:35, skipping insertion in model container [2023-11-19 07:35:35,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:35" (3/3) ... [2023-11-19 07:35:35,399 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.count4.c [2023-11-19 07:35:35,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:35,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:35,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:35,490 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;@4335feb8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:35,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:35:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 07:35:35,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:35,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:35,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1805125260, now seen corresponding path program 1 times [2023-11-19 07:35:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746949070] [2023-11-19 07:35:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:35,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:36,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:36,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746949070] [2023-11-19 07:35:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746949070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:36,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:36,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:35:36,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408656141] [2023-11-19 07:35:36,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:36,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:35:36,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:35:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:35:36,323 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:36,493 INFO L93 Difference]: Finished difference Result 31 states and 47 transitions. [2023-11-19 07:35:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 [2023-11-19 07:35:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:36,510 INFO L225 Difference]: With dead ends: 31 [2023-11-19 07:35:36,511 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 07:35:36,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:35:36,522 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:36,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 15 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 07:35:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2023-11-19 07:35:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-19 07:35:36,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2023-11-19 07:35:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:36,572 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-19 07:35:36,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-19 07:35:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:35:36,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:36,576 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:36,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:35:36,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:36,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1382752515, now seen corresponding path program 1 times [2023-11-19 07:35:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:36,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930311676] [2023-11-19 07:35:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:37,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:37,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930311676] [2023-11-19 07:35:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930311676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066308592] [2023-11-19 07:35:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:37,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:37,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:37,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:35:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:37,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:35:37,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:37,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:37,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066308592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:37,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:37,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 14 [2023-11-19 07:35:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503860183] [2023-11-19 07:35:37,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:35:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:37,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:35:37,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:35:37,753 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:37,979 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-11-19 07:35:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:35:37,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 07:35:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:37,982 INFO L225 Difference]: With dead ends: 25 [2023-11-19 07:35:37,982 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 07:35:37,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:35:37,985 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:37,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 17 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 07:35:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2023-11-19 07:35:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-19 07:35:37,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 12 [2023-11-19 07:35:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:37,998 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-19 07:35:37,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-19 07:35:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 07:35:38,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:38,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:38,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:38,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:38,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:38,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash -30128293, now seen corresponding path program 1 times [2023-11-19 07:35:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:38,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829019689] [2023-11-19 07:35:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:38,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:38,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829019689] [2023-11-19 07:35:38,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829019689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:38,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:38,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:35:38,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383937482] [2023-11-19 07:35:38,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:38,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:38,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:38,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:35:38,485 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:38,591 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-11-19 07:35:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2023-11-19 07:35:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:38,598 INFO L225 Difference]: With dead ends: 34 [2023-11-19 07:35:38,598 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 07:35:38,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:38,603 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:38,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 07:35:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-11-19 07:35:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-19 07:35:38,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2023-11-19 07:35:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:38,622 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-19 07:35:38,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-19 07:35:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 07:35:38,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:38,624 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:38,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:35:38,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:38,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash -28281251, now seen corresponding path program 1 times [2023-11-19 07:35:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:38,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955872367] [2023-11-19 07:35:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:38,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955872367] [2023-11-19 07:35:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955872367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:39,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125713499] [2023-11-19 07:35:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:39,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:39,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:39,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:35:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:39,272 WARN L260 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-19 07:35:39,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:39,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:40,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125713499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:40,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:40,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2023-11-19 07:35:40,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004035666] [2023-11-19 07:35:40,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:40,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:35:40,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:35:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:35:40,114 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:41,011 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-11-19 07:35:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:35:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 07:35:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:41,014 INFO L225 Difference]: With dead ends: 50 [2023-11-19 07:35:41,014 INFO L226 Difference]: Without dead ends: 39 [2023-11-19 07:35:41,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:35:41,017 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 87 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:41,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 32 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:35:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-19 07:35:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2023-11-19 07:35:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-19 07:35:41,027 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2023-11-19 07:35:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:41,028 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-19 07:35:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-19 07:35:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:35:41,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:41,030 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:41,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:41,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:41,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:41,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1433151892, now seen corresponding path program 1 times [2023-11-19 07:35:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:41,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040227187] [2023-11-19 07:35:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:41,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040227187] [2023-11-19 07:35:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040227187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536486156] [2023-11-19 07:35:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:41,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:41,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:35:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:41,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-19 07:35:41,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:42,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:42,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536486156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:42,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:42,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2023-11-19 07:35:42,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950315225] [2023-11-19 07:35:42,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:42,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:35:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:35:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:35:42,552 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:43,137 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-11-19 07:35:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:35:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 07:35:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:43,139 INFO L225 Difference]: With dead ends: 55 [2023-11-19 07:35:43,139 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 07:35:43,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:35:43,142 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:43,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 51 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:35:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 07:35:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-11-19 07:35:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-11-19 07:35:43,151 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2023-11-19 07:35:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:43,151 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-11-19 07:35:43,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-11-19 07:35:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:35:43,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:43,153 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:43,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:43,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:43,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:43,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1915896767, now seen corresponding path program 2 times [2023-11-19 07:35:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:43,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642446469] [2023-11-19 07:35:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:43,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:44,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642446469] [2023-11-19 07:35:44,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642446469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738310378] [2023-11-19 07:35:44,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:44,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:44,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:44,555 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:44,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:35:44,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:44,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:44,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-19 07:35:44,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:35:45,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:35:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738310378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:48,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:48,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 35 [2023-11-19 07:35:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031053714] [2023-11-19 07:35:48,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:48,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-19 07:35:48,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-19 07:35:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:35:48,504 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:50,575 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2023-11-19 07:35:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:35:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-19 07:35:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:50,577 INFO L225 Difference]: With dead ends: 67 [2023-11-19 07:35:50,577 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 07:35:50,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=770, Invalid=2652, Unknown=0, NotChecked=0, Total=3422 [2023-11-19 07:35:50,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 141 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:50,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 33 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:35:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 07:35:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2023-11-19 07:35:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-11-19 07:35:50,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2023-11-19 07:35:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:50,587 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-11-19 07:35:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-11-19 07:35:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 07:35:50,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:50,589 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:50,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:50,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:35:50,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:50,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1890938290, now seen corresponding path program 2 times [2023-11-19 07:35:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:50,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305254526] [2023-11-19 07:35:50,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305254526] [2023-11-19 07:35:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305254526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34089684] [2023-11-19 07:35:51,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:51,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:51,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:51,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:35:52,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:52,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:52,165 WARN L260 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-19 07:35:52,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:53,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34089684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:00,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:00,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 17] total 42 [2023-11-19 07:36:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086024771] [2023-11-19 07:36:00,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:00,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-19 07:36:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-19 07:36:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2023-11-19 07:36:00,631 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:02,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:36:04,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:36:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:06,497 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2023-11-19 07:36:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:36:06,500 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-19 07:36:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:06,501 INFO L225 Difference]: With dead ends: 75 [2023-11-19 07:36:06,501 INFO L226 Difference]: Without dead ends: 61 [2023-11-19 07:36:06,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1020, Invalid=3950, Unknown=0, NotChecked=0, Total=4970 [2023-11-19 07:36:06,506 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 244 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:06,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 40 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-19 07:36:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-19 07:36:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-11-19 07:36:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 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) [2023-11-19 07:36:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-11-19 07:36:06,529 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 31 [2023-11-19 07:36:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:06,529 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-11-19 07:36:06,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-11-19 07:36:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 07:36:06,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:06,535 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:06,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:36:06,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:06,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:06,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:06,743 INFO L85 PathProgramCache]: Analyzing trace with hash -167362286, now seen corresponding path program 3 times [2023-11-19 07:36:06,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:06,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137990637] [2023-11-19 07:36:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:06,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 23 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:10,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137990637] [2023-11-19 07:36:10,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137990637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68292464] [2023-11-19 07:36:10,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:36:10,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:10,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:10,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:10,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b94dcb-9eb6-4f0e-97fb-c9be3ba9e46a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:36:10,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-19 07:36:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:10,719 WARN L260 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 188 conjunts are in the unsatisfiable core [2023-11-19 07:36:10,725 INFO L285 TraceCheckSpWp]: Computing forward predicates...