./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-20.i --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_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/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_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/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_00d13381-584d-42f3-bc3a-104b6786bc90/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 7baede3f4b218899c5fa728f3d2f15c45a27c02194fa196820f87130200e77ba --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:08,451 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:08,515 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:44:08,521 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:08,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:08,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:08,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:08,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:08,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:08,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:08,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:08,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:08,556 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:08,559 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:08,560 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:08,560 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:08,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:08,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:08,566 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:08,566 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:08,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:08,567 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:08,567 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:08,568 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:08,568 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:08,569 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:08,570 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:08,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:08,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:08,571 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:08,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:08,572 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:08,573 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:08,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:08,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:08,573 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:08,573 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:08,574 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:08,574 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:08,574 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_00d13381-584d-42f3-bc3a-104b6786bc90/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7baede3f4b218899c5fa728f3d2f15c45a27c02194fa196820f87130200e77ba [2023-11-19 07:44:08,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:08,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:08,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:08,865 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:08,865 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:08,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-20.i [2023-11-19 07:44:11,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:12,280 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:12,281 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-20.i [2023-11-19 07:44:12,294 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/data/42685972e/5c9dbd272dbb4f86ad73b3622293aafd/FLAGc3b3934fb [2023-11-19 07:44:12,308 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/data/42685972e/5c9dbd272dbb4f86ad73b3622293aafd [2023-11-19 07:44:12,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:12,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:12,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:12,315 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:12,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:12,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:12" (1/1) ... [2023-11-19 07:44:12,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3b5b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:12, skipping insertion in model container [2023-11-19 07:44:12,323 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:12" (1/1) ... [2023-11-19 07:44:12,404 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:12,636 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_00d13381-584d-42f3-bc3a-104b6786bc90/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-20.i[916,929] [2023-11-19 07:44:12,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:12,861 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:12,881 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_00d13381-584d-42f3-bc3a-104b6786bc90/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-20.i[916,929] [2023-11-19 07:44:13,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:13,086 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:13,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13 WrapperNode [2023-11-19 07:44:13,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:13,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:13,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:13,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:13,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,134 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,249 INFO L138 Inliner]: procedures = 26, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 434 [2023-11-19 07:44:13,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:13,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:13,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:13,252 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:13,263 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,319 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,328 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:13,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:13,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:13,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:13,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:13,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:13,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:13,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:44:13,523 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:44:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:13,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:13,663 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:13,667 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:14,875 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:14,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:14,891 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:44:14,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:14 BoogieIcfgContainer [2023-11-19 07:44:14,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:14,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:14,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:14,911 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:14,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:12" (1/3) ... [2023-11-19 07:44:14,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c61f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:14, skipping insertion in model container [2023-11-19 07:44:14,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13" (2/3) ... [2023-11-19 07:44:14,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c61f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:14, skipping insertion in model container [2023-11-19 07:44:14,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:14" (3/3) ... [2023-11-19 07:44:14,916 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-20.i [2023-11-19 07:44:14,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:14,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:44:15,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:15,031 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;@2d20a4af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:15,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:44:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 133 states have internal predecessors, (200), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-19 07:44:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-19 07:44:15,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:15,070 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:15,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:15,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1889104999, now seen corresponding path program 1 times [2023-11-19 07:44:15,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:15,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024357654] [2023-11-19 07:44:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:15,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024357654] [2023-11-19 07:44:15,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:44:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021363638] [2023-11-19 07:44:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:15,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:15,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:15,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:15,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:44:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:15,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:44:15,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2023-11-19 07:44:16,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:16,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021363638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:16,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:16,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852253689] [2023-11-19 07:44:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:16,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:44:16,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:44:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:44:16,122 INFO L87 Difference]: Start difference. First operand has 184 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 133 states have internal predecessors, (200), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) [2023-11-19 07:44:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:16,172 INFO L93 Difference]: Finished difference Result 360 states and 637 transitions. [2023-11-19 07:44:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:44:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) Word has length 329 [2023-11-19 07:44:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:16,185 INFO L225 Difference]: With dead ends: 360 [2023-11-19 07:44:16,186 INFO L226 Difference]: Without dead ends: 179 [2023-11-19 07:44:16,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:44:16,195 INFO L413 NwaCegarLoop]: 288 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, 288 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:16,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-19 07:44:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-19 07:44:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 128 states have (on average 1.484375) internal successors, (190), 128 states have internal predecessors, (190), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-19 07:44:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 288 transitions. [2023-11-19 07:44:16,267 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 288 transitions. Word has length 329 [2023-11-19 07:44:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:16,268 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 288 transitions. [2023-11-19 07:44:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) [2023-11-19 07:44:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 288 transitions. [2023-11-19 07:44:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-19 07:44:16,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:16,278 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:16,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:16,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:44:16,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:16,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1396570137, now seen corresponding path program 1 times [2023-11-19 07:44:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:16,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420355425] [2023-11-19 07:44:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:16,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:16,628 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:16,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475259463] [2023-11-19 07:44:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:16,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:16,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:16,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:44:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:16,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:16,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-19 07:44:17,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:17,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:17,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420355425] [2023-11-19 07:44:17,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475259463] [2023-11-19 07:44:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475259463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:17,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989502629] [2023-11-19 07:44:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:17,019 INFO L87 Difference]: Start difference. First operand 179 states and 288 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:17,065 INFO L93 Difference]: Finished difference Result 356 states and 575 transitions. [2023-11-19 07:44:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:17,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 329 [2023-11-19 07:44:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:17,071 INFO L225 Difference]: With dead ends: 356 [2023-11-19 07:44:17,071 INFO L226 Difference]: Without dead ends: 180 [2023-11-19 07:44:17,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:17,074 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 0 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:17,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 567 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-19 07:44:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-19 07:44:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 129 states have (on average 1.4806201550387597) internal successors, (191), 129 states have internal predecessors, (191), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-19 07:44:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 289 transitions. [2023-11-19 07:44:17,098 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 289 transitions. Word has length 329 [2023-11-19 07:44:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:17,101 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 289 transitions. [2023-11-19 07:44:17,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 289 transitions. [2023-11-19 07:44:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-19 07:44:17,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:17,109 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:17,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:17,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:17,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:17,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash -455590601, now seen corresponding path program 1 times [2023-11-19 07:44:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180914043] [2023-11-19 07:44:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:17,446 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:17,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214347216] [2023-11-19 07:44:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:17,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:17,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:17,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:44:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:17,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:17,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-19 07:44:17,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:17,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180914043] [2023-11-19 07:44:17,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:17,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214347216] [2023-11-19 07:44:17,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214347216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:17,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:17,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735532896] [2023-11-19 07:44:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:17,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:17,919 INFO L87 Difference]: Start difference. First operand 180 states and 289 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:18,057 INFO L93 Difference]: Finished difference Result 454 states and 730 transitions. [2023-11-19 07:44:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 331 [2023-11-19 07:44:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:18,063 INFO L225 Difference]: With dead ends: 454 [2023-11-19 07:44:18,063 INFO L226 Difference]: Without dead ends: 277 [2023-11-19 07:44:18,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:18,066 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 153 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:18,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 681 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-19 07:44:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2023-11-19 07:44:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 220 states have (on average 1.5318181818181817) internal successors, (337), 221 states have internal predecessors, (337), 51 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 07:44:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 439 transitions. [2023-11-19 07:44:18,100 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 439 transitions. Word has length 331 [2023-11-19 07:44:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:18,102 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 439 transitions. [2023-11-19 07:44:18,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 439 transitions. [2023-11-19 07:44:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-19 07:44:18,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:18,106 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:18,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:18,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:18,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:18,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1810790585, now seen corresponding path program 1 times [2023-11-19 07:44:18,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:18,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201299876] [2023-11-19 07:44:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:18,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:18,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:18,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473066758] [2023-11-19 07:44:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:18,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:18,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:18,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:18,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:44:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:18,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:18,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-19 07:44:20,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:20,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201299876] [2023-11-19 07:44:20,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473066758] [2023-11-19 07:44:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473066758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:20,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:20,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713010906] [2023-11-19 07:44:20,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:20,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:20,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:20,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:20,139 INFO L87 Difference]: Start difference. First operand 274 states and 439 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:20,492 INFO L93 Difference]: Finished difference Result 814 states and 1309 transitions. [2023-11-19 07:44:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 331 [2023-11-19 07:44:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:20,500 INFO L225 Difference]: With dead ends: 814 [2023-11-19 07:44:20,500 INFO L226 Difference]: Without dead ends: 543 [2023-11-19 07:44:20,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:20,503 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 208 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:20,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 862 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:44:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-11-19 07:44:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2023-11-19 07:44:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 434 states have (on average 1.5253456221198156) internal successors, (662), 436 states have internal predecessors, (662), 102 states have call successors, (102), 4 states have call predecessors, (102), 4 states have return successors, (102), 100 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:44:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 866 transitions. [2023-11-19 07:44:20,571 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 866 transitions. Word has length 331 [2023-11-19 07:44:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:20,572 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 866 transitions. [2023-11-19 07:44:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 866 transitions. [2023-11-19 07:44:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-19 07:44:20,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:20,578 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:20,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:20,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:20,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:20,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash -300019335, now seen corresponding path program 1 times [2023-11-19 07:44:20,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:20,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212730826] [2023-11-19 07:44:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:20,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:20,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:20,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523525044] [2023-11-19 07:44:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:20,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:20,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:20,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:20,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:44:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:21,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:21,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-19 07:44:21,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212730826] [2023-11-19 07:44:21,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523525044] [2023-11-19 07:44:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523525044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:21,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:21,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111979660] [2023-11-19 07:44:21,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:21,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:21,296 INFO L87 Difference]: Start difference. First operand 541 states and 866 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:21,395 INFO L93 Difference]: Finished difference Result 1361 states and 2184 transitions. [2023-11-19 07:44:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 332 [2023-11-19 07:44:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:21,402 INFO L225 Difference]: With dead ends: 1361 [2023-11-19 07:44:21,402 INFO L226 Difference]: Without dead ends: 823 [2023-11-19 07:44:21,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:21,405 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 95 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:21,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 557 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2023-11-19 07:44:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 793. [2023-11-19 07:44:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 686 states have (on average 1.5451895043731778) internal successors, (1060), 688 states have internal predecessors, (1060), 102 states have call successors, (102), 4 states have call predecessors, (102), 4 states have return successors, (102), 100 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:44:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1264 transitions. [2023-11-19 07:44:21,484 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1264 transitions. Word has length 332 [2023-11-19 07:44:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:21,488 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1264 transitions. [2023-11-19 07:44:21,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1264 transitions. [2023-11-19 07:44:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-19 07:44:21,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:21,496 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:21,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:21,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:21,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:21,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1998184159, now seen corresponding path program 1 times [2023-11-19 07:44:21,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:21,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491562843] [2023-11-19 07:44:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:21,794 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:21,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020334143] [2023-11-19 07:44:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:21,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:21,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:21,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:44:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:22,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:44:22,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-19 07:44:22,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:22,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:22,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491562843] [2023-11-19 07:44:22,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:22,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020334143] [2023-11-19 07:44:22,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020334143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:22,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:22,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:44:22,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999006254] [2023-11-19 07:44:22,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:22,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:22,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:22,204 INFO L87 Difference]: Start difference. First operand 793 states and 1264 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:22,347 INFO L93 Difference]: Finished difference Result 1609 states and 2554 transitions. [2023-11-19 07:44:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:44:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 332 [2023-11-19 07:44:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:22,357 INFO L225 Difference]: With dead ends: 1609 [2023-11-19 07:44:22,357 INFO L226 Difference]: Without dead ends: 819 [2023-11-19 07:44:22,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:22,361 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 113 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:22,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 860 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2023-11-19 07:44:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 789. [2023-11-19 07:44:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 682 states have (on average 1.5425219941348973) internal successors, (1052), 684 states have internal predecessors, (1052), 102 states have call successors, (102), 4 states have call predecessors, (102), 4 states have return successors, (102), 100 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:44:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1256 transitions. [2023-11-19 07:44:22,452 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1256 transitions. Word has length 332 [2023-11-19 07:44:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:22,453 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1256 transitions. [2023-11-19 07:44:22,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1256 transitions. [2023-11-19 07:44:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-19 07:44:22,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:22,457 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:22,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:22,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:44:22,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:22,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash -118559113, now seen corresponding path program 1 times [2023-11-19 07:44:22,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:22,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882695116] [2023-11-19 07:44:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:22,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:22,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:22,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034249966] [2023-11-19 07:44:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:22,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:22,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:22,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:22,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:44:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:23,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:23,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-19 07:44:23,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:23,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882695116] [2023-11-19 07:44:23,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:23,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034249966] [2023-11-19 07:44:23,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034249966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:23,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63764154] [2023-11-19 07:44:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:23,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:23,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:23,516 INFO L87 Difference]: Start difference. First operand 789 states and 1256 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:23,587 INFO L93 Difference]: Finished difference Result 1577 states and 2522 transitions. [2023-11-19 07:44:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 332 [2023-11-19 07:44:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:23,598 INFO L225 Difference]: With dead ends: 1577 [2023-11-19 07:44:23,598 INFO L226 Difference]: Without dead ends: 1182 [2023-11-19 07:44:23,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:23,601 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 121 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:23,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 556 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2023-11-19 07:44:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1180. [2023-11-19 07:44:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1020 states have (on average 1.5421568627450981) internal successors, (1573), 1023 states have internal predecessors, (1573), 153 states have call successors, (153), 6 states have call predecessors, (153), 6 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-19 07:44:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1879 transitions. [2023-11-19 07:44:23,699 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1879 transitions. Word has length 332 [2023-11-19 07:44:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:23,701 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1879 transitions. [2023-11-19 07:44:23,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1879 transitions. [2023-11-19 07:44:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-19 07:44:23,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:23,706 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:23,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:23,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:44:23,921 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:23,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -252572619, now seen corresponding path program 1 times [2023-11-19 07:44:23,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:23,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948710395] [2023-11-19 07:44:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:23,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:23,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564439413] [2023-11-19 07:44:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:23,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:24,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:24,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:44:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:24,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:44:24,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2341 proven. 177 refuted. 0 times theorem prover too weak. 2186 trivial. 0 not checked. [2023-11-19 07:44:25,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 105 proven. 180 refuted. 0 times theorem prover too weak. 4419 trivial. 0 not checked. [2023-11-19 07:44:26,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:26,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948710395] [2023-11-19 07:44:26,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:26,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564439413] [2023-11-19 07:44:26,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564439413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:26,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:26,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 07:44:26,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765768053] [2023-11-19 07:44:26,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:26,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:44:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:44:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:44:26,170 INFO L87 Difference]: Start difference. First operand 1180 states and 1879 transitions. Second operand has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 5 states have call successors, (80), 3 states have call predecessors, (80), 7 states have return successors, (81), 5 states have call predecessors, (81), 5 states have call successors, (81) [2023-11-19 07:44:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:26,854 INFO L93 Difference]: Finished difference Result 2393 states and 3785 transitions. [2023-11-19 07:44:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:44:26,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 5 states have call successors, (80), 3 states have call predecessors, (80), 7 states have return successors, (81), 5 states have call predecessors, (81), 5 states have call successors, (81) Word has length 332 [2023-11-19 07:44:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:26,863 INFO L225 Difference]: With dead ends: 2393 [2023-11-19 07:44:26,864 INFO L226 Difference]: Without dead ends: 1216 [2023-11-19 07:44:26,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:44:26,868 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 275 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:26,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 885 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:44:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2023-11-19 07:44:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1204. [2023-11-19 07:44:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1038 states have (on average 1.5154142581888246) internal successors, (1573), 1041 states have internal predecessors, (1573), 153 states have call successors, (153), 12 states have call predecessors, (153), 12 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-19 07:44:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1879 transitions. [2023-11-19 07:44:27,025 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1879 transitions. Word has length 332 [2023-11-19 07:44:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:27,026 INFO L495 AbstractCegarLoop]: Abstraction has 1204 states and 1879 transitions. [2023-11-19 07:44:27,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 5 states have call successors, (80), 3 states have call predecessors, (80), 7 states have return successors, (81), 5 states have call predecessors, (81), 5 states have call successors, (81) [2023-11-19 07:44:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1879 transitions. [2023-11-19 07:44:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-11-19 07:44:27,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:27,034 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:27,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:27,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:27,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:27,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:27,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2088342065, now seen corresponding path program 1 times [2023-11-19 07:44:27,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:27,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078423330] [2023-11-19 07:44:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:27,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:27,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:27,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540011621] [2023-11-19 07:44:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:27,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:27,351 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:27,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:44:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:27,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2394 proven. 75 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2023-11-19 07:44:28,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 69 proven. 75 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2023-11-19 07:44:28,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:28,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078423330] [2023-11-19 07:44:28,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:28,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540011621] [2023-11-19 07:44:28,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540011621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:28,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:28,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:44:28,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787749608] [2023-11-19 07:44:28,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:44:28,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:44:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:28,311 INFO L87 Difference]: Start difference. First operand 1204 states and 1879 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (74), 2 states have call predecessors, (74), 4 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2023-11-19 07:44:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:28,733 INFO L93 Difference]: Finished difference Result 2429 states and 3776 transitions. [2023-11-19 07:44:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:44:28,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (74), 2 states have call predecessors, (74), 4 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) Word has length 333 [2023-11-19 07:44:28,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:28,743 INFO L225 Difference]: With dead ends: 2429 [2023-11-19 07:44:28,744 INFO L226 Difference]: Without dead ends: 1228 [2023-11-19 07:44:28,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:44:28,750 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 497 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:28,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 587 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:44:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2023-11-19 07:44:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1216. [2023-11-19 07:44:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1047 states have (on average 1.5052531041069723) internal successors, (1576), 1050 states have internal predecessors, (1576), 153 states have call successors, (153), 15 states have call predecessors, (153), 15 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-19 07:44:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1882 transitions. [2023-11-19 07:44:28,892 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1882 transitions. Word has length 333 [2023-11-19 07:44:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:28,893 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 1882 transitions. [2023-11-19 07:44:28,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (74), 2 states have call predecessors, (74), 4 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2023-11-19 07:44:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1882 transitions. [2023-11-19 07:44:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2023-11-19 07:44:28,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:28,898 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:28,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:29,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:29,113 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:29,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2001197295, now seen corresponding path program 1 times [2023-11-19 07:44:29,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:29,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688184848] [2023-11-19 07:44:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:29,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:29,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:29,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549176596] [2023-11-19 07:44:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:29,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:29,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:29,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:44:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:29,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:44:29,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2451 proven. 174 refuted. 0 times theorem prover too weak. 2079 trivial. 0 not checked. [2023-11-19 07:44:30,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 108 proven. 177 refuted. 0 times theorem prover too weak. 4419 trivial. 0 not checked. [2023-11-19 07:44:30,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:30,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688184848] [2023-11-19 07:44:30,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:30,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549176596] [2023-11-19 07:44:30,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549176596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:30,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:30,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 07:44:30,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103570246] [2023-11-19 07:44:30,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:30,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:44:30,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:44:30,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:44:30,901 INFO L87 Difference]: Start difference. First operand 1216 states and 1882 transitions. Second operand has 14 states, 14 states have (on average 12.214285714285714) internal successors, (171), 14 states have internal predecessors, (171), 5 states have call successors, (80), 3 states have call predecessors, (80), 7 states have return successors, (81), 5 states have call predecessors, (81), 5 states have call successors, (81) [2023-11-19 07:44:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:31,736 INFO L93 Difference]: Finished difference Result 2459 states and 3788 transitions. [2023-11-19 07:44:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:44:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.214285714285714) internal successors, (171), 14 states have internal predecessors, (171), 5 states have call successors, (80), 3 states have call predecessors, (80), 7 states have return successors, (81), 5 states have call predecessors, (81), 5 states have call successors, (81) Word has length 334 [2023-11-19 07:44:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:31,746 INFO L225 Difference]: With dead ends: 2459 [2023-11-19 07:44:31,747 INFO L226 Difference]: Without dead ends: 1246 [2023-11-19 07:44:31,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:44:31,751 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 626 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:31,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 881 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:44:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-11-19 07:44:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1228. [2023-11-19 07:44:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1056 states have (on average 1.4839015151515151) internal successors, (1567), 1059 states have internal predecessors, (1567), 153 states have call successors, (153), 18 states have call predecessors, (153), 18 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-19 07:44:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1873 transitions. [2023-11-19 07:44:31,864 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1873 transitions. Word has length 334 [2023-11-19 07:44:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:31,865 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1873 transitions. [2023-11-19 07:44:31,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.214285714285714) internal successors, (171), 14 states have internal predecessors, (171), 5 states have call successors, (80), 3 states have call predecessors, (80), 7 states have return successors, (81), 5 states have call predecessors, (81), 5 states have call successors, (81) [2023-11-19 07:44:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1873 transitions. [2023-11-19 07:44:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2023-11-19 07:44:31,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:31,870 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:31,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:32,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:44:32,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:32,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:32,094 INFO L85 PathProgramCache]: Analyzing trace with hash 990080045, now seen corresponding path program 1 times [2023-11-19 07:44:32,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:32,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561709007] [2023-11-19 07:44:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:32,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:32,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:32,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779254474] [2023-11-19 07:44:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:32,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:32,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:32,167 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:32,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:44:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:32,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:44:32,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2706 proven. 198 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2023-11-19 07:44:34,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2023-11-19 07:44:34,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561709007] [2023-11-19 07:44:34,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779254474] [2023-11-19 07:44:34,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779254474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:34,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:34,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 16 [2023-11-19 07:44:34,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23914224] [2023-11-19 07:44:34,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:44:34,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:44:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:44:34,961 INFO L87 Difference]: Start difference. First operand 1228 states and 1873 transitions. Second operand has 16 states, 16 states have (on average 10.5) internal successors, (168), 16 states have internal predecessors, (168), 5 states have call successors, (98), 4 states have call predecessors, (98), 7 states have return successors, (98), 5 states have call predecessors, (98), 5 states have call successors, (98) [2023-11-19 07:44:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:37,149 INFO L93 Difference]: Finished difference Result 3449 states and 5210 transitions. [2023-11-19 07:44:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:44:37,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.5) internal successors, (168), 16 states have internal predecessors, (168), 5 states have call successors, (98), 4 states have call predecessors, (98), 7 states have return successors, (98), 5 states have call predecessors, (98), 5 states have call successors, (98) Word has length 334 [2023-11-19 07:44:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:37,164 INFO L225 Difference]: With dead ends: 3449 [2023-11-19 07:44:37,164 INFO L226 Difference]: Without dead ends: 2224 [2023-11-19 07:44:37,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2023-11-19 07:44:37,168 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 871 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:37,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 1815 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 07:44:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2023-11-19 07:44:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2161. [2023-11-19 07:44:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 1867 states have (on average 1.4643813604713445) internal successors, (2734), 1875 states have internal predecessors, (2734), 257 states have call successors, (257), 36 states have call predecessors, (257), 36 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2023-11-19 07:44:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 3248 transitions. [2023-11-19 07:44:37,354 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 3248 transitions. Word has length 334 [2023-11-19 07:44:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:37,355 INFO L495 AbstractCegarLoop]: Abstraction has 2161 states and 3248 transitions. [2023-11-19 07:44:37,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.5) internal successors, (168), 16 states have internal predecessors, (168), 5 states have call successors, (98), 4 states have call predecessors, (98), 7 states have return successors, (98), 5 states have call predecessors, (98), 5 states have call successors, (98) [2023-11-19 07:44:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 3248 transitions. [2023-11-19 07:44:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-11-19 07:44:37,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:37,360 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:37,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:37,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:37,577 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:37,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1735405521, now seen corresponding path program 1 times [2023-11-19 07:44:37,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:37,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983657180] [2023-11-19 07:44:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:37,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953400671] [2023-11-19 07:44:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:37,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:37,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:37,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:37,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:44:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:38,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:44:38,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 1020 proven. 375 refuted. 0 times theorem prover too weak. 3309 trivial. 0 not checked. [2023-11-19 07:44:41,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-19 07:44:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983657180] [2023-11-19 07:44:41,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953400671] [2023-11-19 07:44:41,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953400671] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:41,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:41,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 20 [2023-11-19 07:44:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087292237] [2023-11-19 07:44:41,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:41,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:44:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:41,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:44:41,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:44:41,495 INFO L87 Difference]: Start difference. First operand 2161 states and 3248 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:42,823 INFO L93 Difference]: Finished difference Result 7024 states and 10479 transitions. [2023-11-19 07:44:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:44:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 335 [2023-11-19 07:44:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:42,857 INFO L225 Difference]: With dead ends: 7024 [2023-11-19 07:44:42,857 INFO L226 Difference]: Without dead ends: 5453 [2023-11-19 07:44:42,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:44:42,864 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 842 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:42,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1196 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:44:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2023-11-19 07:44:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 3349. [2023-11-19 07:44:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3031 states have (on average 1.46519300560871) internal successors, (4441), 3044 states have internal predecessors, (4441), 273 states have call successors, (273), 44 states have call predecessors, (273), 44 states have return successors, (273), 260 states have call predecessors, (273), 273 states have call successors, (273) [2023-11-19 07:44:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 4987 transitions. [2023-11-19 07:44:43,218 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 4987 transitions. Word has length 335 [2023-11-19 07:44:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:43,219 INFO L495 AbstractCegarLoop]: Abstraction has 3349 states and 4987 transitions. [2023-11-19 07:44:43,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-19 07:44:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 4987 transitions. [2023-11-19 07:44:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-11-19 07:44:43,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:43,225 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:43,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:43,435 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:43,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -19919773, now seen corresponding path program 1 times [2023-11-19 07:44:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:43,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054570060] [2023-11-19 07:44:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:43,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:43,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505328257] [2023-11-19 07:44:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:43,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:43,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:43,492 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:43,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00d13381-584d-42f3-bc3a-104b6786bc90/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:44:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:43,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:44:43,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 1020 proven. 375 refuted. 0 times theorem prover too weak. 3309 trivial. 0 not checked. [2023-11-19 07:44:46,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 24 proven. 261 refuted. 0 times theorem prover too weak. 4419 trivial. 0 not checked. [2023-11-19 07:44:48,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:48,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054570060] [2023-11-19 07:44:48,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:48,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505328257] [2023-11-19 07:44:48,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505328257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:48,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:48,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2023-11-19 07:44:48,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926828381] [2023-11-19 07:44:48,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:48,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:44:48,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:44:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:44:48,320 INFO L87 Difference]: Start difference. First operand 3349 states and 4987 transitions. Second operand has 21 states, 20 states have (on average 9.5) internal successors, (190), 19 states have internal predecessors, (190), 7 states have call successors, (98), 5 states have call predecessors, (98), 9 states have return successors, (98), 7 states have call predecessors, (98), 7 states have call successors, (98) [2023-11-19 07:44:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:54,426 INFO L93 Difference]: Finished difference Result 10525 states and 15463 transitions. [2023-11-19 07:44:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-19 07:44:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 9.5) internal successors, (190), 19 states have internal predecessors, (190), 7 states have call successors, (98), 5 states have call predecessors, (98), 9 states have return successors, (98), 7 states have call predecessors, (98), 7 states have call successors, (98) Word has length 335 [2023-11-19 07:44:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:54,472 INFO L225 Difference]: With dead ends: 10525 [2023-11-19 07:44:54,472 INFO L226 Difference]: Without dead ends: 7370 [2023-11-19 07:44:54,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 658 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1638, Invalid=3332, Unknown=0, NotChecked=0, Total=4970 [2023-11-19 07:44:54,482 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 2165 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:54,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2170 Valid, 2061 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-19 07:44:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states.