./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/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_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:02:27,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:02:27,509 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:02:27,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:02:27,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:02:27,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:02:27,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:02:27,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:02:27,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:02:27,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:02:27,548 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:02:27,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:02:27,549 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:02:27,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:02:27,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:02:27,552 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:02:27,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:02:27,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:02:27,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:02:27,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:02:27,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:02:27,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:02:27,556 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:02:27,557 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:02:27,558 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:02:27,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:02:27,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:02:27,560 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:02:27,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:27,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:02:27,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:02:27,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:02:27,563 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:02:27,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:02:27,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:02:27,564 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:02:27,565 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:02:27,565 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:02:27,566 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:02:27,566 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_159f5fb1-ca84-4afd-8fc2-373a755bdd94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c [2023-11-19 08:02:27,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:02:27,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:02:27,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:02:27,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:02:27,970 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:02:27,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2023-11-19 08:02:31,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:02:31,623 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:02:31,624 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2023-11-19 08:02:31,632 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/data/554433a91/a16e9d5783014e88b58a7fe2eddc586d/FLAG860e31fdc [2023-11-19 08:02:31,651 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/data/554433a91/a16e9d5783014e88b58a7fe2eddc586d [2023-11-19 08:02:31,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:02:31,656 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:02:31,658 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:31,658 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:02:31,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:02:31,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:31" (1/1) ... [2023-11-19 08:02:31,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612c10be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:31, skipping insertion in model container [2023-11-19 08:02:31,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:31" (1/1) ... [2023-11-19 08:02:31,692 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:02:31,956 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_159f5fb1-ca84-4afd-8fc2-373a755bdd94/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2023-11-19 08:02:31,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:31,986 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:02:32,001 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_159f5fb1-ca84-4afd-8fc2-373a755bdd94/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2023-11-19 08:02:32,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:32,024 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:02:32,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32 WrapperNode [2023-11-19 08:02:32,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:32,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:32,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:02:32,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:02:32,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,071 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-19 08:02:32,072 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:32,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:02:32,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:02:32,073 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:02:32,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,086 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,086 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:02:32,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:02:32,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:02:32,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:02:32,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:32,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:32,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:02:32,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:02:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:02:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:02:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:02:32,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:02:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 08:02:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 08:02:32,272 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:02:32,274 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:02:32,450 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:02:32,459 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:02:32,459 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:02:32,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:32 BoogieIcfgContainer [2023-11-19 08:02:32,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:02:32,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:02:32,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:02:32,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:02:32,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:31" (1/3) ... [2023-11-19 08:02:32,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6f1991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:32, skipping insertion in model container [2023-11-19 08:02:32,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32" (2/3) ... [2023-11-19 08:02:32,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6f1991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:32, skipping insertion in model container [2023-11-19 08:02:32,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:32" (3/3) ... [2023-11-19 08:02:32,476 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.c [2023-11-19 08:02:32,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:02:32,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:02:32,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:32,564 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;@1b1eae7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:32,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:02:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 08:02:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 08:02:32,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:32,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:32,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:32,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2023-11-19 08:02:32,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:32,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509761551] [2023-11-19 08:02:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:32,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:32,780 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 08:02:32,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509761551] [2023-11-19 08:02:32,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509761551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:32,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:32,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004989002] [2023-11-19 08:02:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:32,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:02:32,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:02:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:32,828 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:32,856 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2023-11-19 08:02:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:02:32,859 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 08:02:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:32,868 INFO L225 Difference]: With dead ends: 49 [2023-11-19 08:02:32,868 INFO L226 Difference]: Without dead ends: 22 [2023-11-19 08:02:32,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:32,877 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:32,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-19 08:02:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-19 08:02:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 08:02:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-11-19 08:02:32,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2023-11-19 08:02:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:32,927 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-11-19 08:02:32,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-11-19 08:02:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 08:02:32,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:32,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:32,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:02:32,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:32,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2023-11-19 08:02:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:32,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680179651] [2023-11-19 08:02:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:32,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:33,104 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 08:02:33,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680179651] [2023-11-19 08:02:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680179651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:33,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:33,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:02:33,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849732589] [2023-11-19 08:02:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:33,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:33,110 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:33,199 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-19 08:02:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:33,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 08:02:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:33,202 INFO L225 Difference]: With dead ends: 35 [2023-11-19 08:02:33,202 INFO L226 Difference]: Without dead ends: 33 [2023-11-19 08:02:33,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:02:33,205 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:33,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-19 08:02:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-11-19 08:02:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 08:02:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-19 08:02:33,220 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-11-19 08:02:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:33,220 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-19 08:02:33,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-19 08:02:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 08:02:33,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:33,222 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:33,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:02:33,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:33,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2023-11-19 08:02:33,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:33,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544161201] [2023-11-19 08:02:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:33,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-19 08:02:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:33,369 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 08:02:33,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:33,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544161201] [2023-11-19 08:02:33,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544161201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:33,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:33,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:02:33,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304450870] [2023-11-19 08:02:33,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:33,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:33,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:33,375 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:02:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:33,442 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-11-19 08:02:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-19 08:02:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:33,445 INFO L225 Difference]: With dead ends: 39 [2023-11-19 08:02:33,445 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 08:02:33,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:02:33,448 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:33,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 85 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 08:02:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-11-19 08:02:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 08:02:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-19 08:02:33,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-11-19 08:02:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:33,472 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-19 08:02:33,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:02:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-19 08:02:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 08:02:33,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:33,474 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:33,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:02:33,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:33,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:33,475 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2023-11-19 08:02:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340593912] [2023-11-19 08:02:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:33,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:33,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:33,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479842997] [2023-11-19 08:02:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:33,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:33,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:02:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:33,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:02:33,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:02:33,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:33,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340593912] [2023-11-19 08:02:33,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479842997] [2023-11-19 08:02:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479842997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:33,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:33,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:02:33,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083861499] [2023-11-19 08:02:33,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:33,832 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:02:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:33,911 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-11-19 08:02:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:02:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-19 08:02:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:33,913 INFO L225 Difference]: With dead ends: 58 [2023-11-19 08:02:33,913 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 08:02:33,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:02:33,916 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:33,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 88 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 08:02:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-19 08:02:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 08:02:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-11-19 08:02:33,931 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2023-11-19 08:02:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:33,931 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-11-19 08:02:33,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:02:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-11-19 08:02:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 08:02:33,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:33,934 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:33,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:34,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:34,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:34,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:34,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2023-11-19 08:02:34,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:34,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571342406] [2023-11-19 08:02:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:34,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:34,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362255826] [2023-11-19 08:02:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:34,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:34,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:34,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:34,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:02:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:34,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:02:34,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:02:34,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:02:34,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571342406] [2023-11-19 08:02:34,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362255826] [2023-11-19 08:02:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362255826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:34,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:34,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-19 08:02:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346469931] [2023-11-19 08:02:34,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:34,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:02:34,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:34,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:02:34,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:02:34,621 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 08:02:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:34,722 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2023-11-19 08:02:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:02:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-11-19 08:02:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:34,724 INFO L225 Difference]: With dead ends: 57 [2023-11-19 08:02:34,724 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 08:02:34,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:02:34,726 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:34,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 75 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 08:02:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-11-19 08:02:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 08:02:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-11-19 08:02:34,738 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2023-11-19 08:02:34,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:34,738 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-11-19 08:02:34,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 08:02:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-11-19 08:02:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 08:02:34,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:34,740 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:34,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:34,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2023-11-19 08:02:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:34,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070741789] [2023-11-19 08:02:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:34,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:34,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:34,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928742949] [2023-11-19 08:02:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:34,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:34,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:34,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:35,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:02:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:35,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:02:35,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 08:02:35,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-19 08:02:35,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070741789] [2023-11-19 08:02:35,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928742949] [2023-11-19 08:02:35,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928742949] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:35,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:02:35,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 08:02:35,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210694653] [2023-11-19 08:02:35,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:35,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:35,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:35,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:35,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:02:35,259 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 08:02:36,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:02:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:36,895 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2023-11-19 08:02:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:02:36,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-11-19 08:02:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:36,899 INFO L225 Difference]: With dead ends: 61 [2023-11-19 08:02:36,901 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 08:02:36,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:02:36,903 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:36,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 08:02:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 08:02:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-11-19 08:02:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-19 08:02:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-11-19 08:02:36,935 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2023-11-19 08:02:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:36,935 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-11-19 08:02:36,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 08:02:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-11-19 08:02:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 08:02:36,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:36,941 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:36,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:37,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:37,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:37,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:37,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2023-11-19 08:02:37,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:37,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276040890] [2023-11-19 08:02:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:37,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:37,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:37,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510614133] [2023-11-19 08:02:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:37,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:37,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:37,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:37,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:02:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:37,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 08:02:37,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 08:02:37,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 08:02:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:39,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276040890] [2023-11-19 08:02:39,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:39,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510614133] [2023-11-19 08:02:39,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510614133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:39,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:39,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-19 08:02:39,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835502892] [2023-11-19 08:02:39,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:39,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:02:39,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:02:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:02:39,231 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 08:02:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:40,472 INFO L93 Difference]: Finished difference Result 136 states and 184 transitions. [2023-11-19 08:02:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:02:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 56 [2023-11-19 08:02:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:40,475 INFO L225 Difference]: With dead ends: 136 [2023-11-19 08:02:40,475 INFO L226 Difference]: Without dead ends: 107 [2023-11-19 08:02:40,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:02:40,477 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:40,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 199 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:02:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-19 08:02:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2023-11-19 08:02:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 67 states have internal predecessors, (75), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 08:02:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2023-11-19 08:02:40,549 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 56 [2023-11-19 08:02:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:40,550 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2023-11-19 08:02:40,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 08:02:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2023-11-19 08:02:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 08:02:40,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:40,558 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:40,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 08:02:40,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:40,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:40,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:40,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2023-11-19 08:02:40,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:40,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863354538] [2023-11-19 08:02:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:40,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:40,794 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:40,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505802194] [2023-11-19 08:02:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:40,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:40,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:40,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:40,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:02:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:40,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 08:02:40,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-19 08:02:41,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-19 08:02:42,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:42,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863354538] [2023-11-19 08:02:42,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:42,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505802194] [2023-11-19 08:02:42,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505802194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:42,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:42,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-11-19 08:02:42,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134961939] [2023-11-19 08:02:42,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:42,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:02:42,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:42,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:02:42,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:02:42,122 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2023-11-19 08:02:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:42,912 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2023-11-19 08:02:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:02:42,913 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) Word has length 67 [2023-11-19 08:02:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:42,914 INFO L225 Difference]: With dead ends: 158 [2023-11-19 08:02:42,914 INFO L226 Difference]: Without dead ends: 126 [2023-11-19 08:02:42,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:02:42,916 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:42,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:02:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-19 08:02:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2023-11-19 08:02:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 66 states have internal predecessors, (72), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 08:02:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2023-11-19 08:02:42,966 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 67 [2023-11-19 08:02:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:42,966 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2023-11-19 08:02:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2023-11-19 08:02:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2023-11-19 08:02:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 08:02:42,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:42,968 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:42,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:43,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:43,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1728532070, now seen corresponding path program 1 times [2023-11-19 08:02:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:43,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267567582] [2023-11-19 08:02:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:43,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:43,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:43,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540006411] [2023-11-19 08:02:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:43,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:43,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:02:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:43,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 08:02:43,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-19 08:02:43,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-19 08:02:44,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:44,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267567582] [2023-11-19 08:02:44,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:44,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540006411] [2023-11-19 08:02:44,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540006411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:44,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:44,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-19 08:02:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262688328] [2023-11-19 08:02:44,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:44,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:02:44,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:02:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:02:44,033 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-19 08:02:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:44,279 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2023-11-19 08:02:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:02:44,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 72 [2023-11-19 08:02:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:44,285 INFO L225 Difference]: With dead ends: 120 [2023-11-19 08:02:44,286 INFO L226 Difference]: Without dead ends: 93 [2023-11-19 08:02:44,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:02:44,291 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:44,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 152 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-19 08:02:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-19 08:02:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 08:02:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2023-11-19 08:02:44,348 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 72 [2023-11-19 08:02:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:44,348 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2023-11-19 08:02:44,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-19 08:02:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2023-11-19 08:02:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 08:02:44,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:44,351 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:44,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:44,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:44,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:44,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:44,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times [2023-11-19 08:02:44,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:44,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547471169] [2023-11-19 08:02:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:44,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:44,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:44,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379858162] [2023-11-19 08:02:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:44,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:44,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:44,586 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:44,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:02:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:44,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:02:44,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-19 08:02:44,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547471169] [2023-11-19 08:02:44,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379858162] [2023-11-19 08:02:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379858162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:44,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:44,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:02:44,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53998591] [2023-11-19 08:02:44,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:44,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:02:44,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:02:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:02:44,832 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-19 08:02:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:44,967 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2023-11-19 08:02:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2023-11-19 08:02:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:44,969 INFO L225 Difference]: With dead ends: 125 [2023-11-19 08:02:44,969 INFO L226 Difference]: Without dead ends: 88 [2023-11-19 08:02:44,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:02:44,970 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:44,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-19 08:02:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2023-11-19 08:02:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-19 08:02:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-11-19 08:02:45,008 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 86 [2023-11-19 08:02:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:45,008 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-11-19 08:02:45,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-19 08:02:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-11-19 08:02:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 08:02:45,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:45,010 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:45,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:45,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:02:45,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:45,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2023-11-19 08:02:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:45,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382981067] [2023-11-19 08:02:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:45,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:45,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361096659] [2023-11-19 08:02:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:45,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:45,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:45,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159f5fb1-ca84-4afd-8fc2-373a755bdd94/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:02:45,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:45,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:45,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-19 08:02:45,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-19 08:02:45,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-19 08:03:09,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:09,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382981067] [2023-11-19 08:03:09,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:09,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361096659] [2023-11-19 08:03:09,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361096659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:09,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:03:09,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2023-11-19 08:03:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050262230] [2023-11-19 08:03:09,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:03:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:03:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:03:09,244 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-19 08:03:24,138 WARN L293 SmtUtils]: Spent 14.52s on a formula simplification. DAG size of input: 171 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-19 08:03:27,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []