./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl --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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:23:10,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:23:10,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:23:10,237 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:23:10,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:23:10,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:23:10,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:23:10,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:23:10,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:23:10,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:23:10,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:23:10,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:23:10,290 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:23:10,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:23:10,292 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:23:10,292 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:23:10,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:23:10,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:23:10,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:23:10,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:23:10,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:23:10,295 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:23:10,296 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:23:10,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:23:10,296 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:23:10,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:23:10,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:23:10,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:23:10,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:10,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:23:10,301 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:23:10,301 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:23:10,301 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:23:10,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:23:10,302 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:23:10,302 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:23:10,302 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:23:10,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:23:10,302 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:23:10,303 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_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2023-11-12 02:23:10,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:23:10,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:23:10,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:23:10,629 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:23:10,630 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:23:10,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/systemc/pipeline.cil-1.c [2023-11-12 02:23:13,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:23:14,008 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:23:14,010 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/sv-benchmarks/c/systemc/pipeline.cil-1.c [2023-11-12 02:23:14,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/data/b8e218dc6/e15961875eb94f04b7842e1662c53d63/FLAG024303e0e [2023-11-12 02:23:14,046 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/data/b8e218dc6/e15961875eb94f04b7842e1662c53d63 [2023-11-12 02:23:14,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:23:14,056 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:23:14,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:14,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:23:14,067 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:23:14,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb799b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14, skipping insertion in model container [2023-11-12 02:23:14,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,136 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:23:14,286 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_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2023-11-12 02:23:14,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:14,418 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:23:14,431 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_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2023-11-12 02:23:14,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:14,496 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:23:14,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14 WrapperNode [2023-11-12 02:23:14,497 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:14,498 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:14,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:23:14,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:23:14,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,521 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,566 INFO L138 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 426 [2023-11-12 02:23:14,566 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:14,567 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:23:14,567 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:23:14,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:23:14,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,581 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,581 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,612 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,615 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:23:14,627 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:23:14,627 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:23:14,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:23:14,628 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (1/1) ... [2023-11-12 02:23:14,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:14,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:14,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:23:14,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:23:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:23:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:23:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-11-12 02:23:14,721 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-11-12 02:23:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:23:14,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:23:14,867 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:23:14,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:23:15,516 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:23:15,526 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:23:15,526 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:23:15,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:15 BoogieIcfgContainer [2023-11-12 02:23:15,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:23:15,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:23:15,532 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:23:15,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:23:15,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:23:14" (1/3) ... [2023-11-12 02:23:15,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74532dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:15, skipping insertion in model container [2023-11-12 02:23:15,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:14" (2/3) ... [2023-11-12 02:23:15,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74532dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:15, skipping insertion in model container [2023-11-12 02:23:15,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:15" (3/3) ... [2023-11-12 02:23:15,539 INFO L112 eAbstractionObserver]: Analyzing ICFG pipeline.cil-1.c [2023-11-12 02:23:15,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:23:15,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:23:15,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:23:15,647 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;@693984b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:23:15,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:23:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 02:23:15,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:15,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:15,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:15,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash -827879702, now seen corresponding path program 1 times [2023-11-12 02:23:15,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:15,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386877100] [2023-11-12 02:23:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:16,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:16,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-12 02:23:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-12 02:23:16,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:16,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386877100] [2023-11-12 02:23:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386877100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:16,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:16,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:23:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120990056] [2023-11-12 02:23:16,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:16,749 INFO L87 Difference]: Start difference. First operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:18,039 INFO L93 Difference]: Finished difference Result 498 states and 888 transitions. [2023-11-12 02:23:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:23:18,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2023-11-12 02:23:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:18,059 INFO L225 Difference]: With dead ends: 498 [2023-11-12 02:23:18,059 INFO L226 Difference]: Without dead ends: 344 [2023-11-12 02:23:18,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:18,071 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 335 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:18,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 531 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:23:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-12 02:23:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 152. [2023-11-12 02:23:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.7551020408163265) internal successors, (258), 148 states have internal predecessors, (258), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 264 transitions. [2023-11-12 02:23:18,156 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 264 transitions. Word has length 94 [2023-11-12 02:23:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:18,157 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 264 transitions. [2023-11-12 02:23:18,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 264 transitions. [2023-11-12 02:23:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:18,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:18,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:18,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:23:18,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1071269142, now seen corresponding path program 1 times [2023-11-12 02:23:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:18,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454827290] [2023-11-12 02:23:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:18,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:18,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:18,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-12 02:23:18,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:18,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454827290] [2023-11-12 02:23:18,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454827290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:18,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:18,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:23:18,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212651767] [2023-11-12 02:23:18,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:18,725 INFO L87 Difference]: Start difference. First operand 152 states and 264 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:19,826 INFO L93 Difference]: Finished difference Result 553 states and 983 transitions. [2023-11-12 02:23:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:23:19,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:19,832 INFO L225 Difference]: With dead ends: 553 [2023-11-12 02:23:19,832 INFO L226 Difference]: Without dead ends: 404 [2023-11-12 02:23:19,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:23:19,836 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 477 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:19,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 762 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:23:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-12 02:23:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 182. [2023-11-12 02:23:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.7853107344632768) internal successors, (316), 178 states have internal predecessors, (316), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 322 transitions. [2023-11-12 02:23:19,860 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 322 transitions. Word has length 188 [2023-11-12 02:23:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:19,861 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 322 transitions. [2023-11-12 02:23:19,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 322 transitions. [2023-11-12 02:23:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:19,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:19,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:19,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:23:19,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:19,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1036829934, now seen corresponding path program 1 times [2023-11-12 02:23:19,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301232006] [2023-11-12 02:23:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:20,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-12 02:23:20,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:20,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301232006] [2023-11-12 02:23:20,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301232006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:20,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:20,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:23:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595279064] [2023-11-12 02:23:20,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:20,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:20,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:20,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:20,356 INFO L87 Difference]: Start difference. First operand 182 states and 322 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:21,435 INFO L93 Difference]: Finished difference Result 671 states and 1209 transitions. [2023-11-12 02:23:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:23:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:21,442 INFO L225 Difference]: With dead ends: 671 [2023-11-12 02:23:21,442 INFO L226 Difference]: Without dead ends: 492 [2023-11-12 02:23:21,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:23:21,446 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 477 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:21,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 759 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:23:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-11-12 02:23:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 226. [2023-11-12 02:23:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.8099547511312217) internal successors, (400), 222 states have internal predecessors, (400), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 406 transitions. [2023-11-12 02:23:21,468 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 406 transitions. Word has length 188 [2023-11-12 02:23:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:21,469 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 406 transitions. [2023-11-12 02:23:21,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 406 transitions. [2023-11-12 02:23:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:21,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:21,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:21,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:23:21,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:21,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:21,475 INFO L85 PathProgramCache]: Analyzing trace with hash -59773682, now seen corresponding path program 1 times [2023-11-12 02:23:21,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:21,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499432213] [2023-11-12 02:23:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:21,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:21,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:21,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-12 02:23:21,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499432213] [2023-11-12 02:23:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499432213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:21,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:21,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:23:21,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666162053] [2023-11-12 02:23:21,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:21,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:21,922 INFO L87 Difference]: Start difference. First operand 226 states and 406 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:23,285 INFO L93 Difference]: Finished difference Result 1035 states and 1879 transitions. [2023-11-12 02:23:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:23:23,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:23,292 INFO L225 Difference]: With dead ends: 1035 [2023-11-12 02:23:23,292 INFO L226 Difference]: Without dead ends: 812 [2023-11-12 02:23:23,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:23:23,296 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 814 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:23,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 747 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:23:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-11-12 02:23:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 350. [2023-11-12 02:23:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.8318840579710145) internal successors, (632), 346 states have internal predecessors, (632), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 638 transitions. [2023-11-12 02:23:23,329 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 638 transitions. Word has length 188 [2023-11-12 02:23:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:23,330 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 638 transitions. [2023-11-12 02:23:23,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 638 transitions. [2023-11-12 02:23:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:23,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:23,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:23,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:23:23,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:23,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2092644362, now seen corresponding path program 1 times [2023-11-12 02:23:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:23,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910105950] [2023-11-12 02:23:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:23,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:23,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:23,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-12 02:23:23,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:23,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910105950] [2023-11-12 02:23:23,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910105950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:23,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:23,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:23:23,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625182434] [2023-11-12 02:23:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:23,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:23,762 INFO L87 Difference]: Start difference. First operand 350 states and 638 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:25,158 INFO L93 Difference]: Finished difference Result 1267 states and 2337 transitions. [2023-11-12 02:23:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:23:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:25,167 INFO L225 Difference]: With dead ends: 1267 [2023-11-12 02:23:25,167 INFO L226 Difference]: Without dead ends: 920 [2023-11-12 02:23:25,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:23:25,173 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 840 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:25,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 543 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:23:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-11-12 02:23:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 440. [2023-11-12 02:23:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6735632183908047) internal successors, (728), 436 states have internal predecessors, (728), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 734 transitions. [2023-11-12 02:23:25,203 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 734 transitions. Word has length 188 [2023-11-12 02:23:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:25,203 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 734 transitions. [2023-11-12 02:23:25,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 734 transitions. [2023-11-12 02:23:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:25,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:25,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:25,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:23:25,208 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:25,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:25,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1371492218, now seen corresponding path program 1 times [2023-11-12 02:23:25,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:25,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31224140] [2023-11-12 02:23:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:25,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:25,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:23:25,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:25,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31224140] [2023-11-12 02:23:25,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31224140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:25,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998902459] [2023-11-12 02:23:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:25,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:25,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:25,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:23:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:25,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:25,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-12 02:23:25,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:25,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998902459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:25,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:25,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:23:25,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601161643] [2023-11-12 02:23:25,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:25,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:25,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:25,969 INFO L87 Difference]: Start difference. First operand 440 states and 734 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:25,993 INFO L93 Difference]: Finished difference Result 877 states and 1467 transitions. [2023-11-12 02:23:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:25,997 INFO L225 Difference]: With dead ends: 877 [2023-11-12 02:23:25,998 INFO L226 Difference]: Without dead ends: 440 [2023-11-12 02:23:26,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:26,003 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:26,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-12 02:23:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-11-12 02:23:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6689655172413793) internal successors, (726), 436 states have internal predecessors, (726), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 732 transitions. [2023-11-12 02:23:26,024 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 732 transitions. Word has length 188 [2023-11-12 02:23:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:26,024 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 732 transitions. [2023-11-12 02:23:26,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 732 transitions. [2023-11-12 02:23:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:26,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:26,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:26,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:26,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:23:26,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:26,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash 412512002, now seen corresponding path program 1 times [2023-11-12 02:23:26,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:26,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175412013] [2023-11-12 02:23:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:26,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:26,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:23:26,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:26,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175412013] [2023-11-12 02:23:26,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175412013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:26,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639598703] [2023-11-12 02:23:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:26,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:26,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:26,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:26,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:23:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:26,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:26,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-12 02:23:26,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:26,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639598703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:26,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:26,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:23:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332569094] [2023-11-12 02:23:26,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:26,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:26,932 INFO L87 Difference]: Start difference. First operand 440 states and 732 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:26,958 INFO L93 Difference]: Finished difference Result 877 states and 1463 transitions. [2023-11-12 02:23:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:26,962 INFO L225 Difference]: With dead ends: 877 [2023-11-12 02:23:26,962 INFO L226 Difference]: Without dead ends: 440 [2023-11-12 02:23:26,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:26,967 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:26,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 261 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-12 02:23:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-11-12 02:23:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.664367816091954) internal successors, (724), 436 states have internal predecessors, (724), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 730 transitions. [2023-11-12 02:23:26,988 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 730 transitions. Word has length 188 [2023-11-12 02:23:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:26,989 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 730 transitions. [2023-11-12 02:23:26,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 730 transitions. [2023-11-12 02:23:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:26,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:26,993 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:27,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:27,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:23:27,206 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:27,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:27,206 INFO L85 PathProgramCache]: Analyzing trace with hash -117932026, now seen corresponding path program 1 times [2023-11-12 02:23:27,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:27,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043825684] [2023-11-12 02:23:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:27,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:27,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:27,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:23:27,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:27,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043825684] [2023-11-12 02:23:27,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043825684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:27,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310347118] [2023-11-12 02:23:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:27,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:27,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:27,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:27,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:23:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:27,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:27,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-12 02:23:27,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:27,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310347118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:27,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:27,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:23:27,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706554359] [2023-11-12 02:23:27,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:27,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:27,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:27,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:27,866 INFO L87 Difference]: Start difference. First operand 440 states and 730 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:27,891 INFO L93 Difference]: Finished difference Result 877 states and 1459 transitions. [2023-11-12 02:23:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:27,894 INFO L225 Difference]: With dead ends: 877 [2023-11-12 02:23:27,895 INFO L226 Difference]: Without dead ends: 440 [2023-11-12 02:23:27,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:27,899 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:27,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-12 02:23:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-11-12 02:23:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6597701149425288) internal successors, (722), 436 states have internal predecessors, (722), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 728 transitions. [2023-11-12 02:23:27,919 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 728 transitions. Word has length 188 [2023-11-12 02:23:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:27,919 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 728 transitions. [2023-11-12 02:23:27,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 728 transitions. [2023-11-12 02:23:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:27,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:27,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:27,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:28,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:23:28,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:28,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash 618172290, now seen corresponding path program 1 times [2023-11-12 02:23:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:28,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200630971] [2023-11-12 02:23:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:28,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:28,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:23:28,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200630971] [2023-11-12 02:23:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200630971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104657832] [2023-11-12 02:23:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:28,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:28,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:28,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:28,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:23:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:28,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:28,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-12 02:23:28,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:28,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104657832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:28,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:28,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:23:28,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673935086] [2023-11-12 02:23:28,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:28,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:28,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:28,772 INFO L87 Difference]: Start difference. First operand 440 states and 728 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:28,798 INFO L93 Difference]: Finished difference Result 877 states and 1455 transitions. [2023-11-12 02:23:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:28,803 INFO L225 Difference]: With dead ends: 877 [2023-11-12 02:23:28,803 INFO L226 Difference]: Without dead ends: 440 [2023-11-12 02:23:28,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:28,809 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:28,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-12 02:23:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-11-12 02:23:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6551724137931034) internal successors, (720), 436 states have internal predecessors, (720), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:23:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 726 transitions. [2023-11-12 02:23:28,831 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 726 transitions. Word has length 188 [2023-11-12 02:23:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:28,832 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 726 transitions. [2023-11-12 02:23:28,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 726 transitions. [2023-11-12 02:23:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:28,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:28,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:28,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:29,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:29,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1962569606, now seen corresponding path program 1 times [2023-11-12 02:23:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:29,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641375799] [2023-11-12 02:23:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:29,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:29,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:23:29,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:29,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641375799] [2023-11-12 02:23:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641375799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:29,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25839005] [2023-11-12 02:23:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:29,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:29,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:23:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:29,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:29,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 02:23:29,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:29,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25839005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:29,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-12 02:23:29,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731185221] [2023-11-12 02:23:29,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:29,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:29,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:29,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:29,761 INFO L87 Difference]: Start difference. First operand 440 states and 726 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:29,827 INFO L93 Difference]: Finished difference Result 1314 states and 2180 transitions. [2023-11-12 02:23:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:29,837 INFO L225 Difference]: With dead ends: 1314 [2023-11-12 02:23:29,838 INFO L226 Difference]: Without dead ends: 877 [2023-11-12 02:23:29,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:29,844 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 226 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:29,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2023-11-12 02:23:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 875. [2023-11-12 02:23:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 867 states have (on average 1.6262975778546713) internal successors, (1410), 868 states have internal predecessors, (1410), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-12 02:23:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1425 transitions. [2023-11-12 02:23:29,896 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1425 transitions. Word has length 188 [2023-11-12 02:23:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:29,896 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1425 transitions. [2023-11-12 02:23:29,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1425 transitions. [2023-11-12 02:23:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:29,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:29,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:29,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:30,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:30,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash -235127422, now seen corresponding path program 1 times [2023-11-12 02:23:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:30,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947068096] [2023-11-12 02:23:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:30,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:30,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 02:23:30,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:30,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947068096] [2023-11-12 02:23:30,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947068096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:30,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496120198] [2023-11-12 02:23:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:30,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:30,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:30,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:23:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:30,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:30,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:23:30,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496120198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:30,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:30,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-12 02:23:30,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443252622] [2023-11-12 02:23:30,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:30,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:30,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:30,763 INFO L87 Difference]: Start difference. First operand 875 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:30,853 INFO L93 Difference]: Finished difference Result 2401 states and 3973 transitions. [2023-11-12 02:23:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:30,868 INFO L225 Difference]: With dead ends: 2401 [2023-11-12 02:23:30,868 INFO L226 Difference]: Without dead ends: 1529 [2023-11-12 02:23:30,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:30,882 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:30,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 506 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2023-11-12 02:23:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2023-11-12 02:23:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1513 states have (on average 1.6252478519497686) internal successors, (2459), 1514 states have internal predecessors, (2459), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (36), 8 states have call predecessors, (36), 9 states have call successors, (36) [2023-11-12 02:23:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2504 transitions. [2023-11-12 02:23:30,953 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2504 transitions. Word has length 188 [2023-11-12 02:23:30,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:30,953 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 2504 transitions. [2023-11-12 02:23:30,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2504 transitions. [2023-11-12 02:23:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:30,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:30,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:30,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:31,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:31,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:31,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -415896190, now seen corresponding path program 1 times [2023-11-12 02:23:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177259590] [2023-11-12 02:23:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:31,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 02:23:31,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177259590] [2023-11-12 02:23:31,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177259590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202256073] [2023-11-12 02:23:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:31,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:31,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:31,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:31,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:23:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:31,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:31,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 02:23:31,836 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:31,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202256073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:31,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:31,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-12 02:23:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402680721] [2023-11-12 02:23:31,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:31,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:31,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:31,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:31,838 INFO L87 Difference]: Start difference. First operand 1527 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:31,980 INFO L93 Difference]: Finished difference Result 4575 states and 7634 transitions. [2023-11-12 02:23:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:32,018 INFO L225 Difference]: With dead ends: 4575 [2023-11-12 02:23:32,018 INFO L226 Difference]: Without dead ends: 3051 [2023-11-12 02:23:32,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:32,060 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 226 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:32,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2023-11-12 02:23:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3049. [2023-11-12 02:23:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 3023 states have (on average 1.6040357260999007) internal successors, (4849), 3024 states have internal predecessors, (4849), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (136), 16 states have call predecessors, (136), 17 states have call successors, (136) [2023-11-12 02:23:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 5002 transitions. [2023-11-12 02:23:32,233 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 5002 transitions. Word has length 188 [2023-11-12 02:23:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:32,233 INFO L495 AbstractCegarLoop]: Abstraction has 3049 states and 5002 transitions. [2023-11-12 02:23:32,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 5002 transitions. [2023-11-12 02:23:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:32,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:32,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:32,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:32,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:32,485 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:32,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:32,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1945748094, now seen corresponding path program 1 times [2023-11-12 02:23:32,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:32,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537153085] [2023-11-12 02:23:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:32,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:32,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 02:23:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537153085] [2023-11-12 02:23:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537153085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528246381] [2023-11-12 02:23:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:32,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:32,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:32,902 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:32,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:23:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:33,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:33,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:23:33,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:33,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528246381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:33,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:33,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:23:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270597313] [2023-11-12 02:23:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:33,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:33,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:33,197 INFO L87 Difference]: Start difference. First operand 3049 states and 5002 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:33,528 INFO L93 Difference]: Finished difference Result 9141 states and 15512 transitions. [2023-11-12 02:23:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:33,638 INFO L225 Difference]: With dead ends: 9141 [2023-11-12 02:23:33,638 INFO L226 Difference]: Without dead ends: 6095 [2023-11-12 02:23:33,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:23:33,699 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 211 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:33,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2023-11-12 02:23:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6093. [2023-11-12 02:23:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6093 states, 6043 states have (on average 1.582492139665729) internal successors, (9563), 6044 states have internal predecessors, (9563), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (528), 32 states have call predecessors, (528), 33 states have call successors, (528) [2023-11-12 02:23:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6093 states to 6093 states and 10124 transitions. [2023-11-12 02:23:34,198 INFO L78 Accepts]: Start accepts. Automaton has 6093 states and 10124 transitions. Word has length 188 [2023-11-12 02:23:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:34,199 INFO L495 AbstractCegarLoop]: Abstraction has 6093 states and 10124 transitions. [2023-11-12 02:23:34,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6093 states and 10124 transitions. [2023-11-12 02:23:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:34,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:34,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:34,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:34,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:23:34,503 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:34,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash 307905662, now seen corresponding path program 1 times [2023-11-12 02:23:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:34,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436818623] [2023-11-12 02:23:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:34,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:34,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 02:23:34,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436818623] [2023-11-12 02:23:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436818623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091002047] [2023-11-12 02:23:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:34,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:34,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:34,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:34,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:23:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:35,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:35,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:23:35,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:35,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091002047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:35,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:35,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-12 02:23:35,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546152375] [2023-11-12 02:23:35,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:35,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:35,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:35,188 INFO L87 Difference]: Start difference. First operand 6093 states and 10124 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:36,064 INFO L93 Difference]: Finished difference Result 18273 states and 32414 transitions. [2023-11-12 02:23:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:36,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:36,289 INFO L225 Difference]: With dead ends: 18273 [2023-11-12 02:23:36,289 INFO L226 Difference]: Without dead ends: 12183 [2023-11-12 02:23:36,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:36,513 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 226 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:36,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2023-11-12 02:23:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 12181. [2023-11-12 02:23:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12083 states have (on average 1.560787883803691) internal successors, (18859), 12084 states have internal predecessors, (18859), 65 states have call successors, (65), 32 states have call predecessors, (65), 32 states have return successors, (2080), 64 states have call predecessors, (2080), 65 states have call successors, (2080) [2023-11-12 02:23:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 21004 transitions. [2023-11-12 02:23:37,854 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 21004 transitions. Word has length 188 [2023-11-12 02:23:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:37,855 INFO L495 AbstractCegarLoop]: Abstraction has 12181 states and 21004 transitions. [2023-11-12 02:23:37,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 21004 transitions. [2023-11-12 02:23:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:38,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:38,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:38,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:38,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:38,774 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:38,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -342727814, now seen corresponding path program 1 times [2023-11-12 02:23:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:38,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885384797] [2023-11-12 02:23:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:39,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-12 02:23:39,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:39,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885384797] [2023-11-12 02:23:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885384797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:39,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116099829] [2023-11-12 02:23:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:39,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:39,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:39,287 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:39,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:23:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:39,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:39,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 02:23:39,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116099829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:39,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:39,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-12 02:23:39,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970672350] [2023-11-12 02:23:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:39,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:39,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:39,538 INFO L87 Difference]: Start difference. First operand 12181 states and 21004 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:42,178 INFO L93 Difference]: Finished difference Result 36537 states and 71198 transitions. [2023-11-12 02:23:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:42,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2023-11-12 02:23:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:43,092 INFO L225 Difference]: With dead ends: 36537 [2023-11-12 02:23:43,093 INFO L226 Difference]: Without dead ends: 24359 [2023-11-12 02:23:43,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:43,716 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 225 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:43,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24359 states. [2023-11-12 02:23:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24359 to 24357. [2023-11-12 02:23:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24357 states, 24163 states have (on average 1.5390059181393039) internal successors, (37187), 24164 states have internal predecessors, (37187), 129 states have call successors, (129), 64 states have call predecessors, (129), 64 states have return successors, (8256), 128 states have call predecessors, (8256), 129 states have call successors, (8256) [2023-11-12 02:23:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24357 states to 24357 states and 45572 transitions. [2023-11-12 02:23:46,537 INFO L78 Accepts]: Start accepts. Automaton has 24357 states and 45572 transitions. Word has length 188 [2023-11-12 02:23:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:46,538 INFO L495 AbstractCegarLoop]: Abstraction has 24357 states and 45572 transitions. [2023-11-12 02:23:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:23:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 24357 states and 45572 transitions. [2023-11-12 02:23:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:23:48,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:48,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:48,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:48,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:23:48,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:48,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:48,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1629754234, now seen corresponding path program 1 times [2023-11-12 02:23:48,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:48,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852898015] [2023-11-12 02:23:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:48,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:48,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:23:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:48,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-12 02:23:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 02:23:48,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:48,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852898015] [2023-11-12 02:23:48,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852898015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:48,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693485947] [2023-11-12 02:23:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:48,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:48,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:48,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ec2dda5-e413-4e3c-8f0d-a2c470a62b80/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:23:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:48,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:48,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 02:23:49,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:49,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693485947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:49,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:49,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-12 02:23:49,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928990313] [2023-11-12 02:23:49,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:49,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:49,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:49,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:49,035 INFO L87 Difference]: Start difference. First operand 24357 states and 45572 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)