./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-53.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-53.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 433e151ff3abdaf4e4718c9ced99d2dc7cf27dfb3e48e73977d43bba901b54fd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:03:46,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:03:46,167 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:03:46,178 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:03:46,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:03:46,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:03:46,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:03:46,226 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:03:46,228 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:03:46,233 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:03:46,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:03:46,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:03:46,235 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:03:46,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:03:46,238 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:03:46,238 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:03:46,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:03:46,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:03:46,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:03:46,240 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:03:46,240 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:03:46,241 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:03:46,241 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:03:46,242 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:03:46,242 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:03:46,243 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:03:46,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:03:46,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:03:46,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:03:46,245 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:03:46,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:03:46,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:03:46,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:03:46,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:03:46,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:03:46,249 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:03:46,249 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:03:46,249 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:03:46,249 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:03:46,250 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_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 433e151ff3abdaf4e4718c9ced99d2dc7cf27dfb3e48e73977d43bba901b54fd [2023-11-06 22:03:46,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:03:46,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:03:46,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:03:46,652 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:03:46,653 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:03:46,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-53.i [2023-11-06 22:03:49,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:03:50,213 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:03:50,214 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-53.i [2023-11-06 22:03:50,252 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/data/ca18b7e11/94df300323394cc8ab56668e5c484dae/FLAGb60fe5f9c [2023-11-06 22:03:50,429 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/data/ca18b7e11/94df300323394cc8ab56668e5c484dae [2023-11-06 22:03:50,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:03:50,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:03:50,441 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:03:50,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:03:50,447 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:03:50,452 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:03:50" (1/1) ... [2023-11-06 22:03:50,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bfcf67d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:50, skipping insertion in model container [2023-11-06 22:03:50,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:03:50" (1/1) ... [2023-11-06 22:03:50,560 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:03:50,796 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_8a6dd821-2be6-4230-b37b-56ed003ef333/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-53.i[916,929] [2023-11-06 22:03:51,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:03:51,165 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:03:51,180 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_8a6dd821-2be6-4230-b37b-56ed003ef333/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-53.i[916,929] [2023-11-06 22:03:51,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:03:51,320 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:03:51,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51 WrapperNode [2023-11-06 22:03:51,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:03:51,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:03:51,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:03:51,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:03:51,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,537 INFO L138 Inliner]: procedures = 26, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 612 [2023-11-06 22:03:51,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:03:51,538 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:03:51,538 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:03:51,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:03:51,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,698 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,733 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:03:51,775 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:03:51,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:03:51,776 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:03:51,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (1/1) ... [2023-11-06 22:03:51,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:03:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:51,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:03:51,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:03:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:03:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:03:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:03:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:03:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:03:51,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:03:52,059 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:03:52,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:03:53,719 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:03:53,728 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:03:53,728 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:03:53,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:03:53 BoogieIcfgContainer [2023-11-06 22:03:53,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:03:53,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:03:53,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:03:53,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:03:53,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:03:50" (1/3) ... [2023-11-06 22:03:53,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5007f716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:03:53, skipping insertion in model container [2023-11-06 22:03:53,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:51" (2/3) ... [2023-11-06 22:03:53,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5007f716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:03:53, skipping insertion in model container [2023-11-06 22:03:53,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:03:53" (3/3) ... [2023-11-06 22:03:53,740 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-53.i [2023-11-06 22:03:53,759 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:03:53,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:03:53,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:03:53,841 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=LoopsAndPotentialCycles, 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;@680c6de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:03:53,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:03:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 174 states have (on average 1.5919540229885059) internal successors, (277), 175 states have internal predecessors, (277), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-06 22:03:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:03:53,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:53,906 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:53,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:53,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2118974903, now seen corresponding path program 1 times [2023-11-06 22:03:53,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:53,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764061535] [2023-11-06 22:03:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:54,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764061535] [2023-11-06 22:03:54,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:03:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275616230] [2023-11-06 22:03:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:54,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:54,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:03:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:54,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:03:54,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2023-11-06 22:03:55,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:55,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275616230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:55,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:55,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135242327] [2023-11-06 22:03:55,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:55,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:03:55,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:03:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:03:55,191 INFO L87 Difference]: Start difference. First operand has 244 states, 174 states have (on average 1.5919540229885059) internal successors, (277), 175 states have internal predecessors, (277), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Second operand has 2 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-06 22:03:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:55,262 INFO L93 Difference]: Finished difference Result 481 states and 883 transitions. [2023-11-06 22:03:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:03:55,274 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) Word has length 456 [2023-11-06 22:03:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:55,287 INFO L225 Difference]: With dead ends: 481 [2023-11-06 22:03:55,287 INFO L226 Difference]: Without dead ends: 240 [2023-11-06 22:03:55,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:03:55,298 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:55,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:03:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-06 22:03:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2023-11-06 22:03:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 171 states have (on average 1.567251461988304) internal successors, (268), 171 states have internal predecessors, (268), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-06 22:03:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 402 transitions. [2023-11-06 22:03:55,384 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 402 transitions. Word has length 456 [2023-11-06 22:03:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:55,385 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 402 transitions. [2023-11-06 22:03:55,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-06 22:03:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 402 transitions. [2023-11-06 22:03:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:03:55,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:55,400 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:55,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:55,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:03:55,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:55,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 297696643, now seen corresponding path program 1 times [2023-11-06 22:03:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63579424] [2023-11-06 22:03:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:55,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:55,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64879047] [2023-11-06 22:03:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:55,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:55,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:55,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:55,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:03:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:56,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:03:56,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:03:56,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:56,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:56,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63579424] [2023-11-06 22:03:56,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:56,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64879047] [2023-11-06 22:03:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64879047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:56,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:56,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:03:56,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597671546] [2023-11-06 22:03:56,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:56,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:56,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:56,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:56,564 INFO L87 Difference]: Start difference. First operand 240 states and 402 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:03:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:56,703 INFO L93 Difference]: Finished difference Result 477 states and 801 transitions. [2023-11-06 22:03:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:03:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:56,713 INFO L225 Difference]: With dead ends: 477 [2023-11-06 22:03:56,714 INFO L226 Difference]: Without dead ends: 240 [2023-11-06 22:03:56,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:56,717 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 18 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:56,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 769 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:03:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-06 22:03:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2023-11-06 22:03:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 171 states have (on average 1.5614035087719298) internal successors, (267), 171 states have internal predecessors, (267), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-06 22:03:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 401 transitions. [2023-11-06 22:03:56,773 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 401 transitions. Word has length 456 [2023-11-06 22:03:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:56,780 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 401 transitions. [2023-11-06 22:03:56,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:03:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 401 transitions. [2023-11-06 22:03:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:03:56,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:56,795 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:56,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:57,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:57,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:57,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash -403367935, now seen corresponding path program 1 times [2023-11-06 22:03:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:57,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145982899] [2023-11-06 22:03:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:57,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:57,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:57,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837389166] [2023-11-06 22:03:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:57,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:57,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:57,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:03:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:57,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:03:57,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:03:57,836 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:57,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145982899] [2023-11-06 22:03:57,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837389166] [2023-11-06 22:03:57,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837389166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:57,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:57,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:03:57,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712975820] [2023-11-06 22:03:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:57,842 INFO L87 Difference]: Start difference. First operand 240 states and 401 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:03:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:58,024 INFO L93 Difference]: Finished difference Result 622 states and 1041 transitions. [2023-11-06 22:03:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:03:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:58,033 INFO L225 Difference]: With dead ends: 622 [2023-11-06 22:03:58,034 INFO L226 Difference]: Without dead ends: 385 [2023-11-06 22:03:58,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:58,039 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 222 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:58,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 778 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:03:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-06 22:03:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 382. [2023-11-06 22:03:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 286 states have (on average 1.583916083916084) internal successors, (453), 287 states have internal predecessors, (453), 93 states have call successors, (93), 2 states have call predecessors, (93), 2 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-06 22:03:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 639 transitions. [2023-11-06 22:03:58,106 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 639 transitions. Word has length 456 [2023-11-06 22:03:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:58,111 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 639 transitions. [2023-11-06 22:03:58,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:03:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 639 transitions. [2023-11-06 22:03:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:03:58,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:58,119 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:58,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:58,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:58,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:58,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1355248763, now seen corresponding path program 1 times [2023-11-06 22:03:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:58,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033741423] [2023-11-06 22:03:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:58,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:58,436 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144492308] [2023-11-06 22:03:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:58,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:58,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:58,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:58,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:03:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:58,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:03:58,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:03:59,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033741423] [2023-11-06 22:03:59,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:59,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144492308] [2023-11-06 22:03:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144492308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:03:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672336290] [2023-11-06 22:03:59,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:59,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:59,082 INFO L87 Difference]: Start difference. First operand 382 states and 639 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:03:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:59,245 INFO L93 Difference]: Finished difference Result 1060 states and 1777 transitions. [2023-11-06 22:03:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:59,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:03:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:59,257 INFO L225 Difference]: With dead ends: 1060 [2023-11-06 22:03:59,258 INFO L226 Difference]: Without dead ends: 681 [2023-11-06 22:03:59,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:59,284 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 244 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:59,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 834 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:03:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-11-06 22:03:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 677. [2023-11-06 22:03:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 531 states have (on average 1.591337099811676) internal successors, (845), 534 states have internal predecessors, (845), 141 states have call successors, (141), 4 states have call predecessors, (141), 4 states have return successors, (141), 138 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-06 22:03:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1127 transitions. [2023-11-06 22:03:59,378 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1127 transitions. Word has length 456 [2023-11-06 22:03:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:59,381 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1127 transitions. [2023-11-06 22:03:59,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:03:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1127 transitions. [2023-11-06 22:03:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:03:59,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:59,390 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:59,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:59,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:59,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1607758329, now seen corresponding path program 1 times [2023-11-06 22:03:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:59,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564220311] [2023-11-06 22:03:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:59,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:59,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091729682] [2023-11-06 22:03:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:59,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:59,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:04:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:00,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:04:00,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:00,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:00,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:00,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564220311] [2023-11-06 22:04:00,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:00,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091729682] [2023-11-06 22:04:00,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091729682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:00,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:00,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266418998] [2023-11-06 22:04:00,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:04:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:00,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:04:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:04:00,312 INFO L87 Difference]: Start difference. First operand 677 states and 1127 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:00,447 INFO L93 Difference]: Finished difference Result 2017 states and 3359 transitions. [2023-11-06 22:04:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:04:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:00,459 INFO L225 Difference]: With dead ends: 2017 [2023-11-06 22:04:00,459 INFO L226 Difference]: Without dead ends: 1343 [2023-11-06 22:04:00,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:04:00,463 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 374 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:00,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1123 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:04:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2023-11-06 22:04:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1341. [2023-11-06 22:04:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1050 states have (on average 1.579047619047619) internal successors, (1658), 1056 states have internal predecessors, (1658), 282 states have call successors, (282), 8 states have call predecessors, (282), 8 states have return successors, (282), 276 states have call predecessors, (282), 282 states have call successors, (282) [2023-11-06 22:04:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2222 transitions. [2023-11-06 22:04:00,613 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2222 transitions. Word has length 456 [2023-11-06 22:04:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:00,616 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 2222 transitions. [2023-11-06 22:04:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2222 transitions. [2023-11-06 22:04:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:04:00,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:00,623 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:00,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:00,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:00,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:00,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash -948226807, now seen corresponding path program 1 times [2023-11-06 22:04:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:00,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231347466] [2023-11-06 22:04:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:00,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:00,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358641269] [2023-11-06 22:04:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:00,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:00,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:00,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:04:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:01,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:04:01,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:01,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:01,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:01,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231347466] [2023-11-06 22:04:01,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:01,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358641269] [2023-11-06 22:04:01,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358641269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:01,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:01,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:01,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659326274] [2023-11-06 22:04:01,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:01,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:04:01,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:01,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:04:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:04:01,611 INFO L87 Difference]: Start difference. First operand 1341 states and 2222 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:01,884 INFO L93 Difference]: Finished difference Result 3717 states and 6140 transitions. [2023-11-06 22:04:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:01,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:04:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:01,908 INFO L225 Difference]: With dead ends: 3717 [2023-11-06 22:04:01,908 INFO L226 Difference]: Without dead ends: 2379 [2023-11-06 22:04:01,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:04:01,914 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 272 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:01,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 779 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:04:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2023-11-06 22:04:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2375. [2023-11-06 22:04:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 1798 states have (on average 1.5472747497219133) internal successors, (2782), 1812 states have internal predecessors, (2782), 560 states have call successors, (560), 16 states have call predecessors, (560), 16 states have return successors, (560), 546 states have call predecessors, (560), 560 states have call successors, (560) [2023-11-06 22:04:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 3902 transitions. [2023-11-06 22:04:02,200 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 3902 transitions. Word has length 456 [2023-11-06 22:04:02,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:02,201 INFO L495 AbstractCegarLoop]: Abstraction has 2375 states and 3902 transitions. [2023-11-06 22:04:02,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 3902 transitions. [2023-11-06 22:04:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:04:02,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:02,209 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:02,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:02,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:04:02,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:02,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash 194775881, now seen corresponding path program 1 times [2023-11-06 22:04:02,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:02,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667027622] [2023-11-06 22:04:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:02,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:02,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736910287] [2023-11-06 22:04:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:02,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:02,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:02,515 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:02,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:04:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:03,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:03,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:05,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:05,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667027622] [2023-11-06 22:04:05,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736910287] [2023-11-06 22:04:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736910287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:05,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892722435] [2023-11-06 22:04:05,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:05,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:05,130 INFO L87 Difference]: Start difference. First operand 2375 states and 3902 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:06,014 INFO L93 Difference]: Finished difference Result 8298 states and 13646 transitions. [2023-11-06 22:04:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:04:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:04:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:06,069 INFO L225 Difference]: With dead ends: 8298 [2023-11-06 22:04:06,069 INFO L226 Difference]: Without dead ends: 5926 [2023-11-06 22:04:06,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:06,081 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 537 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:06,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1078 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:04:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2023-11-06 22:04:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5906. [2023-11-06 22:04:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5906 states, 4465 states have (on average 1.5339305711086226) internal successors, (6849), 4500 states have internal predecessors, (6849), 1400 states have call successors, (1400), 40 states have call predecessors, (1400), 40 states have return successors, (1400), 1365 states have call predecessors, (1400), 1400 states have call successors, (1400) [2023-11-06 22:04:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5906 states to 5906 states and 9649 transitions. [2023-11-06 22:04:06,817 INFO L78 Accepts]: Start accepts. Automaton has 5906 states and 9649 transitions. Word has length 456 [2023-11-06 22:04:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:06,819 INFO L495 AbstractCegarLoop]: Abstraction has 5906 states and 9649 transitions. [2023-11-06 22:04:06,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5906 states and 9649 transitions. [2023-11-06 22:04:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:04:06,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:06,832 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:06,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:07,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:07,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:07,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash -198251129, now seen corresponding path program 1 times [2023-11-06 22:04:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457675929] [2023-11-06 22:04:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:07,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:07,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:07,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227694409] [2023-11-06 22:04:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:07,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:07,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:07,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:07,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:04:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:07,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:04:07,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:09,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:09,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:09,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457675929] [2023-11-06 22:04:09,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227694409] [2023-11-06 22:04:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227694409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:09,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:09,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852276920] [2023-11-06 22:04:09,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:09,220 INFO L87 Difference]: Start difference. First operand 5906 states and 9649 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:09,944 INFO L93 Difference]: Finished difference Result 12941 states and 21149 transitions. [2023-11-06 22:04:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:04:09,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:04:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:09,996 INFO L225 Difference]: With dead ends: 12941 [2023-11-06 22:04:09,996 INFO L226 Difference]: Without dead ends: 7038 [2023-11-06 22:04:10,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:10,017 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 623 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:10,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1151 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:04:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2023-11-06 22:04:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 5906. [2023-11-06 22:04:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5906 states, 4465 states have (on average 1.5334826427771557) internal successors, (6847), 4500 states have internal predecessors, (6847), 1400 states have call successors, (1400), 40 states have call predecessors, (1400), 40 states have return successors, (1400), 1365 states have call predecessors, (1400), 1400 states have call successors, (1400) [2023-11-06 22:04:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5906 states to 5906 states and 9647 transitions. [2023-11-06 22:04:10,854 INFO L78 Accepts]: Start accepts. Automaton has 5906 states and 9647 transitions. Word has length 456 [2023-11-06 22:04:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:10,855 INFO L495 AbstractCegarLoop]: Abstraction has 5906 states and 9647 transitions. [2023-11-06 22:04:10,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5906 states and 9647 transitions. [2023-11-06 22:04:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:04:10,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:10,865 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:10,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:11,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:11,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:11,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1535853321, now seen corresponding path program 1 times [2023-11-06 22:04:11,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:11,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177613576] [2023-11-06 22:04:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:11,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:11,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417225913] [2023-11-06 22:04:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:11,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:11,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:04:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:11,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:04:11,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:11,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:11,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:11,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177613576] [2023-11-06 22:04:11,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:11,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417225913] [2023-11-06 22:04:11,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417225913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:11,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:11,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:04:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162130988] [2023-11-06 22:04:11,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:11,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:11,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:11,809 INFO L87 Difference]: Start difference. First operand 5906 states and 9647 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:13,192 INFO L93 Difference]: Finished difference Result 18771 states and 30612 transitions. [2023-11-06 22:04:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:04:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:04:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:13,289 INFO L225 Difference]: With dead ends: 18771 [2023-11-06 22:04:13,289 INFO L226 Difference]: Without dead ends: 11953 [2023-11-06 22:04:13,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:13,317 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 891 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:13,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 1330 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:04:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11953 states. [2023-11-06 22:04:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11953 to 6433. [2023-11-06 22:04:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6433 states, 5472 states have (on average 1.5745614035087718) internal successors, (8616), 5487 states have internal predecessors, (8616), 920 states have call successors, (920), 40 states have call predecessors, (920), 40 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6433 states to 6433 states and 10456 transitions. [2023-11-06 22:04:14,273 INFO L78 Accepts]: Start accepts. Automaton has 6433 states and 10456 transitions. Word has length 456 [2023-11-06 22:04:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:14,275 INFO L495 AbstractCegarLoop]: Abstraction has 6433 states and 10456 transitions. [2023-11-06 22:04:14,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 6433 states and 10456 transitions. [2023-11-06 22:04:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:04:14,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:14,289 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:14,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:14,500 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:14,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1667247747, now seen corresponding path program 1 times [2023-11-06 22:04:14,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:14,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360644449] [2023-11-06 22:04:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:14,650 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:14,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727698335] [2023-11-06 22:04:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:14,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:14,653 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:14,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:04:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:15,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:04:15,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:15,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:15,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:15,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360644449] [2023-11-06 22:04:15,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:15,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727698335] [2023-11-06 22:04:15,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727698335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:15,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:15,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:04:15,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194129423] [2023-11-06 22:04:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:15,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:15,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:15,280 INFO L87 Difference]: Start difference. First operand 6433 states and 10456 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:16,390 INFO L93 Difference]: Finished difference Result 21543 states and 34780 transitions. [2023-11-06 22:04:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:04:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:04:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:16,453 INFO L225 Difference]: With dead ends: 21543 [2023-11-06 22:04:16,454 INFO L226 Difference]: Without dead ends: 15113 [2023-11-06 22:04:16,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:16,476 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 872 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:16,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1437 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:04:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15113 states. [2023-11-06 22:04:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15113 to 6513. [2023-11-06 22:04:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6513 states, 5552 states have (on average 1.569884726224784) internal successors, (8716), 5567 states have internal predecessors, (8716), 920 states have call successors, (920), 40 states have call predecessors, (920), 40 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6513 states to 6513 states and 10556 transitions. [2023-11-06 22:04:17,783 INFO L78 Accepts]: Start accepts. Automaton has 6513 states and 10556 transitions. Word has length 456 [2023-11-06 22:04:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:17,784 INFO L495 AbstractCegarLoop]: Abstraction has 6513 states and 10556 transitions. [2023-11-06 22:04:17,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6513 states and 10556 transitions. [2023-11-06 22:04:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:04:17,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:17,795 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:17,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 22:04:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:04:18,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:18,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1839673469, now seen corresponding path program 1 times [2023-11-06 22:04:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:18,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810668622] [2023-11-06 22:04:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:18,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:18,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622472806] [2023-11-06 22:04:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:18,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:18,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:04:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:18,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:18,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:18,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:18,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:18,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810668622] [2023-11-06 22:04:18,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622472806] [2023-11-06 22:04:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622472806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:18,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:18,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:04:18,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521232744] [2023-11-06 22:04:18,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:18,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:04:18,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:04:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:18,878 INFO L87 Difference]: Start difference. First operand 6513 states and 10556 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:21,627 INFO L93 Difference]: Finished difference Result 29413 states and 47276 transitions. [2023-11-06 22:04:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:04:21,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 456 [2023-11-06 22:04:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:21,801 INFO L225 Difference]: With dead ends: 29413 [2023-11-06 22:04:21,802 INFO L226 Difference]: Without dead ends: 22903 [2023-11-06 22:04:21,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:04:21,823 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 1862 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:21,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1862 Valid, 2652 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:04:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22903 states. [2023-11-06 22:04:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22903 to 7133. [2023-11-06 22:04:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 6172 states have (on average 1.5738820479585223) internal successors, (9714), 6187 states have internal predecessors, (9714), 920 states have call successors, (920), 40 states have call predecessors, (920), 40 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 11554 transitions. [2023-11-06 22:04:23,166 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 11554 transitions. Word has length 456 [2023-11-06 22:04:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:23,168 INFO L495 AbstractCegarLoop]: Abstraction has 7133 states and 11554 transitions. [2023-11-06 22:04:23,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 11554 transitions. [2023-11-06 22:04:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:04:23,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:23,182 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:23,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:23,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:23,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1594861189, now seen corresponding path program 1 times [2023-11-06 22:04:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726699287] [2023-11-06 22:04:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:23,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:23,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92446597] [2023-11-06 22:04:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:23,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:23,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:23,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:04:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:24,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:24,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 582 proven. 192 refuted. 0 times theorem prover too weak. 8070 trivial. 0 not checked. [2023-11-06 22:04:25,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 6 proven. 192 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:04:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726699287] [2023-11-06 22:04:25,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:25,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92446597] [2023-11-06 22:04:25,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92446597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:25,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:25,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:04:25,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469192105] [2023-11-06 22:04:25,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:25,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:25,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:25,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:04:25,767 INFO L87 Difference]: Start difference. First operand 7133 states and 11554 transitions. Second operand has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) [2023-11-06 22:04:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:26,895 INFO L93 Difference]: Finished difference Result 14403 states and 23225 transitions. [2023-11-06 22:04:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:04:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) Word has length 456 [2023-11-06 22:04:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:26,915 INFO L225 Difference]: With dead ends: 14403 [2023-11-06 22:04:26,915 INFO L226 Difference]: Without dead ends: 7273 [2023-11-06 22:04:26,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:04:26,933 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 625 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:26,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 747 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:04:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2023-11-06 22:04:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 7213. [2023-11-06 22:04:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7213 states, 6232 states have (on average 1.5555198973042361) internal successors, (9694), 6247 states have internal predecessors, (9694), 920 states have call successors, (920), 60 states have call predecessors, (920), 60 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7213 states to 7213 states and 11534 transitions. [2023-11-06 22:04:27,678 INFO L78 Accepts]: Start accepts. Automaton has 7213 states and 11534 transitions. Word has length 456 [2023-11-06 22:04:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:27,679 INFO L495 AbstractCegarLoop]: Abstraction has 7213 states and 11534 transitions. [2023-11-06 22:04:27,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) [2023-11-06 22:04:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7213 states and 11534 transitions. [2023-11-06 22:04:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:04:27,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:27,690 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:27,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:27,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:04:27,905 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:27,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:27,906 INFO L85 PathProgramCache]: Analyzing trace with hash -161067412, now seen corresponding path program 1 times [2023-11-06 22:04:27,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:27,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749900277] [2023-11-06 22:04:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:27,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:27,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:27,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528561551] [2023-11-06 22:04:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:27,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:27,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:27,984 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:28,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:04:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:28,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:28,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 1518 proven. 180 refuted. 0 times theorem prover too weak. 7146 trivial. 0 not checked. [2023-11-06 22:04:29,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 18 proven. 180 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:04:29,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:29,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749900277] [2023-11-06 22:04:29,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528561551] [2023-11-06 22:04:29,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528561551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:29,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:29,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:04:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401256676] [2023-11-06 22:04:29,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:29,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:04:29,595 INFO L87 Difference]: Start difference. First operand 7213 states and 11534 transitions. Second operand has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-11-06 22:04:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:30,371 INFO L93 Difference]: Finished difference Result 14293 states and 22718 transitions. [2023-11-06 22:04:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:04:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) Word has length 458 [2023-11-06 22:04:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:30,394 INFO L225 Difference]: With dead ends: 14293 [2023-11-06 22:04:30,394 INFO L226 Difference]: Without dead ends: 7083 [2023-11-06 22:04:30,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:04:30,406 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 767 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:30,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 806 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:04:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2023-11-06 22:04:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 7023. [2023-11-06 22:04:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7023 states, 6022 states have (on average 1.5313849219528395) internal successors, (9222), 6037 states have internal predecessors, (9222), 920 states have call successors, (920), 80 states have call predecessors, (920), 80 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7023 states to 7023 states and 11062 transitions. [2023-11-06 22:04:31,048 INFO L78 Accepts]: Start accepts. Automaton has 7023 states and 11062 transitions. Word has length 458 [2023-11-06 22:04:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:31,049 INFO L495 AbstractCegarLoop]: Abstraction has 7023 states and 11062 transitions. [2023-11-06 22:04:31,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-11-06 22:04:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7023 states and 11062 transitions. [2023-11-06 22:04:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:04:31,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:31,060 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:31,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:31,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:04:31,270 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:31,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:31,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1377272618, now seen corresponding path program 1 times [2023-11-06 22:04:31,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:31,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786218428] [2023-11-06 22:04:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:31,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:31,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472490667] [2023-11-06 22:04:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:31,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:31,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:31,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:31,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:04:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:31,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:31,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4146 proven. 126 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-06 22:04:32,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 72 proven. 126 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:04:32,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:32,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786218428] [2023-11-06 22:04:32,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:32,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472490667] [2023-11-06 22:04:32,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472490667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:32,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:32,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:04:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055201445] [2023-11-06 22:04:32,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:04:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:04:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:04:32,964 INFO L87 Difference]: Start difference. First operand 7023 states and 11062 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2023-11-06 22:04:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:33,785 INFO L93 Difference]: Finished difference Result 12263 states and 19115 transitions. [2023-11-06 22:04:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:04:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) Word has length 458 [2023-11-06 22:04:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:33,801 INFO L225 Difference]: With dead ends: 12263 [2023-11-06 22:04:33,801 INFO L226 Difference]: Without dead ends: 4878 [2023-11-06 22:04:33,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 908 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:04:33,812 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 397 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:33,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 765 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:04:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4878 states. [2023-11-06 22:04:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4878 to 4238. [2023-11-06 22:04:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 3217 states have (on average 1.4460677649984457) internal successors, (4652), 3232 states have internal predecessors, (4652), 920 states have call successors, (920), 100 states have call predecessors, (920), 100 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 6492 transitions. [2023-11-06 22:04:34,512 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 6492 transitions. Word has length 458 [2023-11-06 22:04:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:34,513 INFO L495 AbstractCegarLoop]: Abstraction has 4238 states and 6492 transitions. [2023-11-06 22:04:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2023-11-06 22:04:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 6492 transitions. [2023-11-06 22:04:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:04:34,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:34,520 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:34,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:34,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:34,729 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:34,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash 479231088, now seen corresponding path program 1 times [2023-11-06 22:04:34,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:34,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002170828] [2023-11-06 22:04:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:34,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:34,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:34,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627904678] [2023-11-06 22:04:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:34,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:34,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:34,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:34,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:04:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:35,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:35,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:04:35,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:35,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:35,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002170828] [2023-11-06 22:04:35,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:35,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627904678] [2023-11-06 22:04:35,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627904678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:35,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:35,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:04:35,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470854351] [2023-11-06 22:04:35,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:35,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:35,506 INFO L87 Difference]: Start difference. First operand 4238 states and 6492 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:36,152 INFO L93 Difference]: Finished difference Result 8453 states and 12941 transitions. [2023-11-06 22:04:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:04:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 458 [2023-11-06 22:04:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:36,162 INFO L225 Difference]: With dead ends: 8453 [2023-11-06 22:04:36,162 INFO L226 Difference]: Without dead ends: 4218 [2023-11-06 22:04:36,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:36,171 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 456 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:36,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 471 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:04:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2023-11-06 22:04:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 4218. [2023-11-06 22:04:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4218 states, 3197 states have (on average 1.4363465749139819) internal successors, (4592), 3212 states have internal predecessors, (4592), 920 states have call successors, (920), 100 states have call predecessors, (920), 100 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4218 states to 4218 states and 6432 transitions. [2023-11-06 22:04:36,944 INFO L78 Accepts]: Start accepts. Automaton has 4218 states and 6432 transitions. Word has length 458 [2023-11-06 22:04:36,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:36,945 INFO L495 AbstractCegarLoop]: Abstraction has 4218 states and 6432 transitions. [2023-11-06 22:04:36,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:04:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4218 states and 6432 transitions. [2023-11-06 22:04:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:04:36,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:36,954 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:36,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:37,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:37,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1267277168, now seen corresponding path program 1 times [2023-11-06 22:04:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:37,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063168983] [2023-11-06 22:04:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:37,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:37,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596388576] [2023-11-06 22:04:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:37,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:37,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:37,257 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:37,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:04:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:37,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:37,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4416 proven. 111 refuted. 0 times theorem prover too weak. 4317 trivial. 0 not checked. [2023-11-06 22:04:38,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 87 proven. 111 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:04:38,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063168983] [2023-11-06 22:04:38,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596388576] [2023-11-06 22:04:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596388576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:38,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:04:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859144763] [2023-11-06 22:04:38,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:38,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:04:38,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:38,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:04:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:04:38,830 INFO L87 Difference]: Start difference. First operand 4218 states and 6432 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-06 22:04:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:39,940 INFO L93 Difference]: Finished difference Result 8543 states and 12961 transitions. [2023-11-06 22:04:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:04:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) Word has length 458 [2023-11-06 22:04:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:39,954 INFO L225 Difference]: With dead ends: 8543 [2023-11-06 22:04:39,954 INFO L226 Difference]: Without dead ends: 4328 [2023-11-06 22:04:39,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 908 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:04:39,964 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 241 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:39,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 760 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:04:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2023-11-06 22:04:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4248. [2023-11-06 22:04:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 3217 states have (on average 1.4211998756605533) internal successors, (4572), 3232 states have internal predecessors, (4572), 920 states have call successors, (920), 110 states have call predecessors, (920), 110 states have return successors, (920), 905 states have call predecessors, (920), 920 states have call successors, (920) [2023-11-06 22:04:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 6412 transitions. [2023-11-06 22:04:40,586 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 6412 transitions. Word has length 458 [2023-11-06 22:04:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:40,587 INFO L495 AbstractCegarLoop]: Abstraction has 4248 states and 6412 transitions. [2023-11-06 22:04:40,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-06 22:04:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 6412 transitions. [2023-11-06 22:04:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:04:40,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:40,594 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:40,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:04:40,803 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:40,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1344177966, now seen corresponding path program 1 times [2023-11-06 22:04:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:40,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212957381] [2023-11-06 22:04:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:40,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:40,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839430531] [2023-11-06 22:04:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:40,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:40,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:40,883 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:40,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:04:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:41,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:04:41,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4482 proven. 102 refuted. 0 times theorem prover too weak. 4260 trivial. 0 not checked. [2023-11-06 22:04:42,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 96 proven. 102 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:04:42,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:42,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212957381] [2023-11-06 22:04:42,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839430531] [2023-11-06 22:04:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839430531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:42,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:42,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:04:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855922522] [2023-11-06 22:04:42,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:42,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:04:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:04:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:04:42,501 INFO L87 Difference]: Start difference. First operand 4248 states and 6412 transitions. Second operand has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 states have internal predecessors, (182), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-06 22:04:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:44,772 INFO L93 Difference]: Finished difference Result 13351 states and 20122 transitions. [2023-11-06 22:04:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:04:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 states have internal predecessors, (182), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 458 [2023-11-06 22:04:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:44,795 INFO L225 Difference]: With dead ends: 13351 [2023-11-06 22:04:44,795 INFO L226 Difference]: Without dead ends: 9106 [2023-11-06 22:04:44,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:04:44,806 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1204 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:44,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 1708 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:04:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9106 states. [2023-11-06 22:04:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9106 to 7476. [2023-11-06 22:04:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7476 states, 5745 states have (on average 1.4207136640557005) internal successors, (8162), 5780 states have internal predecessors, (8162), 1500 states have call successors, (1500), 230 states have call predecessors, (1500), 230 states have return successors, (1500), 1465 states have call predecessors, (1500), 1500 states have call successors, (1500) [2023-11-06 22:04:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7476 states to 7476 states and 11162 transitions. [2023-11-06 22:04:45,773 INFO L78 Accepts]: Start accepts. Automaton has 7476 states and 11162 transitions. Word has length 458 [2023-11-06 22:04:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:45,774 INFO L495 AbstractCegarLoop]: Abstraction has 7476 states and 11162 transitions. [2023-11-06 22:04:45,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 states have internal predecessors, (182), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-06 22:04:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7476 states and 11162 transitions. [2023-11-06 22:04:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:04:45,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:45,784 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:45,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:45,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:04:45,998 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:45,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash 989432401, now seen corresponding path program 1 times [2023-11-06 22:04:45,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:45,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101456518] [2023-11-06 22:04:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:45,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:46,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:46,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912806398] [2023-11-06 22:04:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:46,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:46,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:46,088 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:46,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:04:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:46,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:04:46,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4152 proven. 288 refuted. 0 times theorem prover too weak. 4404 trivial. 0 not checked. [2023-11-06 22:04:48,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 102 proven. 291 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-06 22:04:50,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:50,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101456518] [2023-11-06 22:04:50,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:50,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912806398] [2023-11-06 22:04:50,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912806398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:50,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:50,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 22:04:50,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142244285] [2023-11-06 22:04:50,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:04:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:04:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:04:50,641 INFO L87 Difference]: Start difference. First operand 7476 states and 11162 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 5 states have call successors, (119), 3 states have call predecessors, (119), 7 states have return successors, (120), 5 states have call predecessors, (120), 5 states have call successors, (120) [2023-11-06 22:04:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:52,406 INFO L93 Difference]: Finished difference Result 15509 states and 22801 transitions. [2023-11-06 22:04:52,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:04:52,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 5 states have call successors, (119), 3 states have call predecessors, (119), 7 states have return successors, (120), 5 states have call predecessors, (120), 5 states have call successors, (120) Word has length 459 [2023-11-06 22:04:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:52,425 INFO L225 Difference]: With dead ends: 15509 [2023-11-06 22:04:52,425 INFO L226 Difference]: Without dead ends: 8036 [2023-11-06 22:04:52,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:04:52,444 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 568 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:52,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 708 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:04:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8036 states. [2023-11-06 22:04:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8036 to 7796. [2023-11-06 22:04:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7796 states, 5985 states have (on average 1.3988304093567252) internal successors, (8372), 6020 states have internal predecessors, (8372), 1500 states have call successors, (1500), 310 states have call predecessors, (1500), 310 states have return successors, (1500), 1465 states have call predecessors, (1500), 1500 states have call successors, (1500) [2023-11-06 22:04:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7796 states to 7796 states and 11372 transitions. [2023-11-06 22:04:53,882 INFO L78 Accepts]: Start accepts. Automaton has 7796 states and 11372 transitions. Word has length 459 [2023-11-06 22:04:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:53,884 INFO L495 AbstractCegarLoop]: Abstraction has 7796 states and 11372 transitions. [2023-11-06 22:04:53,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 5 states have call successors, (119), 3 states have call predecessors, (119), 7 states have return successors, (120), 5 states have call predecessors, (120), 5 states have call successors, (120) [2023-11-06 22:04:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7796 states and 11372 transitions. [2023-11-06 22:04:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:04:53,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:53,898 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:53,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:54,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:04:54,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:54,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -787628059, now seen corresponding path program 1 times [2023-11-06 22:04:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:54,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487753691] [2023-11-06 22:04:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:54,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:54,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:54,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677952829] [2023-11-06 22:04:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:54,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:54,225 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:54,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:04:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:54,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:04:54,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4482 proven. 102 refuted. 0 times theorem prover too weak. 4260 trivial. 0 not checked. [2023-11-06 22:04:56,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 96 proven. 102 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:04:56,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:56,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487753691] [2023-11-06 22:04:56,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:56,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677952829] [2023-11-06 22:04:56,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677952829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:56,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:56,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:04:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039479044] [2023-11-06 22:04:56,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:56,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:04:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:04:56,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:04:56,720 INFO L87 Difference]: Start difference. First operand 7796 states and 11372 transitions. Second operand has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-06 22:05:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:00,490 INFO L93 Difference]: Finished difference Result 23727 states and 34477 transitions. [2023-11-06 22:05:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:05:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) Word has length 459 [2023-11-06 22:05:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:00,533 INFO L225 Difference]: With dead ends: 23727 [2023-11-06 22:05:00,533 INFO L226 Difference]: Without dead ends: 15934 [2023-11-06 22:05:00,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 907 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:05:00,548 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1361 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:00,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1394 Valid, 1840 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:05:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15934 states. [2023-11-06 22:05:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15934 to 7881. [2023-11-06 22:05:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 6029 states have (on average 1.394261071487809) internal successors, (8406), 6065 states have internal predecessors, (8406), 1532 states have call successors, (1532), 319 states have call predecessors, (1532), 319 states have return successors, (1532), 1496 states have call predecessors, (1532), 1532 states have call successors, (1532) [2023-11-06 22:05:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 11470 transitions. [2023-11-06 22:05:01,872 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 11470 transitions. Word has length 459 [2023-11-06 22:05:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:01,873 INFO L495 AbstractCegarLoop]: Abstraction has 7881 states and 11470 transitions. [2023-11-06 22:05:01,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-06 22:05:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 11470 transitions. [2023-11-06 22:05:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-06 22:05:01,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:01,879 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:01,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:02,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:02,079 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:02,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2031647943, now seen corresponding path program 1 times [2023-11-06 22:05:02,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:02,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234763321] [2023-11-06 22:05:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:02,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:02,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:05:02,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556339470] [2023-11-06 22:05:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:02,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:02,148 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:02,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:05:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:03,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:05:03,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 6021 proven. 348 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2023-11-06 22:05:06,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:05:06,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:06,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234763321] [2023-11-06 22:05:06,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:05:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556339470] [2023-11-06 22:05:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556339470] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:06,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:05:06,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [29] total 31 [2023-11-06 22:05:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441283846] [2023-11-06 22:05:06,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:06,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:05:06,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:05:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:05:06,689 INFO L87 Difference]: Start difference. First operand 7881 states and 11470 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:05:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:08,527 INFO L93 Difference]: Finished difference Result 15634 states and 22765 transitions. [2023-11-06 22:05:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:05:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 460 [2023-11-06 22:05:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:08,545 INFO L225 Difference]: With dead ends: 15634 [2023-11-06 22:05:08,546 INFO L226 Difference]: Without dead ends: 7841 [2023-11-06 22:05:08,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:05:08,559 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 369 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:08,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 569 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:05:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7841 states. [2023-11-06 22:05:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7841 to 7841. [2023-11-06 22:05:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7841 states, 5989 states have (on average 1.3862080480881616) internal successors, (8302), 6025 states have internal predecessors, (8302), 1532 states have call successors, (1532), 319 states have call predecessors, (1532), 319 states have return successors, (1532), 1496 states have call predecessors, (1532), 1532 states have call successors, (1532) [2023-11-06 22:05:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7841 states to 7841 states and 11366 transitions. [2023-11-06 22:05:09,790 INFO L78 Accepts]: Start accepts. Automaton has 7841 states and 11366 transitions. Word has length 460 [2023-11-06 22:05:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:09,791 INFO L495 AbstractCegarLoop]: Abstraction has 7841 states and 11366 transitions. [2023-11-06 22:05:09,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:05:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7841 states and 11366 transitions. [2023-11-06 22:05:09,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-06 22:05:09,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:09,799 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:09,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:10,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:10,010 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:10,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1235488585, now seen corresponding path program 1 times [2023-11-06 22:05:10,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:10,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212312238] [2023-11-06 22:05:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:10,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:05:10,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124335459] [2023-11-06 22:05:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:10,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:10,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:10,120 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:10,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:05:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:10,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:05:10,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-06 22:05:10,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:05:10,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212312238] [2023-11-06 22:05:10,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:05:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124335459] [2023-11-06 22:05:10,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124335459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:10,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:10,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:05:10,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571815773] [2023-11-06 22:05:10,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:10,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:05:10,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:05:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:05:10,851 INFO L87 Difference]: Start difference. First operand 7841 states and 11366 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:05:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:12,313 INFO L93 Difference]: Finished difference Result 15621 states and 22642 transitions. [2023-11-06 22:05:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:05:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 460 [2023-11-06 22:05:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:12,329 INFO L225 Difference]: With dead ends: 15621 [2023-11-06 22:05:12,329 INFO L226 Difference]: Without dead ends: 7868 [2023-11-06 22:05:12,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:12,339 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 315 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:12,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 1532 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2023-11-06 22:05:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 5581. [2023-11-06 22:05:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5581 states, 4624 states have (on average 1.4318771626297577) internal successors, (6621), 4640 states have internal predecessors, (6621), 787 states have call successors, (787), 169 states have call predecessors, (787), 169 states have return successors, (787), 771 states have call predecessors, (787), 787 states have call successors, (787) [2023-11-06 22:05:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5581 states to 5581 states and 8195 transitions. [2023-11-06 22:05:13,261 INFO L78 Accepts]: Start accepts. Automaton has 5581 states and 8195 transitions. Word has length 460 [2023-11-06 22:05:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:13,262 INFO L495 AbstractCegarLoop]: Abstraction has 5581 states and 8195 transitions. [2023-11-06 22:05:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-06 22:05:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5581 states and 8195 transitions. [2023-11-06 22:05:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-06 22:05:13,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:13,270 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:13,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-06 22:05:13,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:05:13,471 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:13,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1744961675, now seen corresponding path program 1 times [2023-11-06 22:05:13,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:13,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269344928] [2023-11-06 22:05:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:13,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:05:13,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115830344] [2023-11-06 22:05:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:13,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:13,549 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:13,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:05:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:14,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:05:14,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 456 proven. 3 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-06 22:05:14,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 195 proven. 3 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:05:14,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:14,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269344928] [2023-11-06 22:05:14,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:05:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115830344] [2023-11-06 22:05:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115830344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:14,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:05:14,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:05:14,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238978583] [2023-11-06 22:05:14,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:14,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:05:14,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:14,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:05:14,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:05:14,647 INFO L87 Difference]: Start difference. First operand 5581 states and 8195 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:05:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:16,284 INFO L93 Difference]: Finished difference Result 10104 states and 14700 transitions. [2023-11-06 22:05:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:05:16,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 460 [2023-11-06 22:05:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:16,294 INFO L225 Difference]: With dead ends: 10104 [2023-11-06 22:05:16,294 INFO L226 Difference]: Without dead ends: 4611 [2023-11-06 22:05:16,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 912 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:05:16,300 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 646 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:16,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 737 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:05:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2023-11-06 22:05:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 4483. [2023-11-06 22:05:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 3521 states have (on average 1.3871059358136892) internal successors, (4884), 3537 states have internal predecessors, (4884), 787 states have call successors, (787), 174 states have call predecessors, (787), 174 states have return successors, (787), 771 states have call predecessors, (787), 787 states have call successors, (787) [2023-11-06 22:05:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 6458 transitions. [2023-11-06 22:05:17,086 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 6458 transitions. Word has length 460 [2023-11-06 22:05:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:17,087 INFO L495 AbstractCegarLoop]: Abstraction has 4483 states and 6458 transitions. [2023-11-06 22:05:17,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:05:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 6458 transitions. [2023-11-06 22:05:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:05:17,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:17,091 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:17,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:05:17,293 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:17,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:17,294 INFO L85 PathProgramCache]: Analyzing trace with hash -164468693, now seen corresponding path program 1 times [2023-11-06 22:05:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516226493] [2023-11-06 22:05:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:17,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:05:17,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175401033] [2023-11-06 22:05:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:17,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:17,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:17,371 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:17,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:05:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:18,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:05:18,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 642 proven. 384 refuted. 0 times theorem prover too weak. 7818 trivial. 0 not checked. [2023-11-06 22:05:21,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 6 proven. 387 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-06 22:05:22,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516226493] [2023-11-06 22:05:22,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:05:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175401033] [2023-11-06 22:05:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175401033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:22,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:05:22,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-11-06 22:05:22,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789669997] [2023-11-06 22:05:22,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:22,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:05:22,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:05:22,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:05:22,509 INFO L87 Difference]: Start difference. First operand 4483 states and 6458 transitions. Second operand has 22 states, 22 states have (on average 8.909090909090908) internal successors, (196), 22 states have internal predecessors, (196), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 4 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-06 22:05:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:31,996 INFO L93 Difference]: Finished difference Result 21396 states and 31287 transitions. [2023-11-06 22:05:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:05:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.909090909090908) internal successors, (196), 22 states have internal predecessors, (196), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 4 states have call predecessors, (134), 6 states have call successors, (134) Word has length 461 [2023-11-06 22:05:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:32,023 INFO L225 Difference]: With dead ends: 21396 [2023-11-06 22:05:32,023 INFO L226 Difference]: Without dead ends: 17001 [2023-11-06 22:05:32,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 909 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:05:32,030 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 3713 mSDsluCounter, 4474 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 1322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3717 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1322 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:32,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3717 Valid, 4734 Invalid, 4905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1322 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-06 22:05:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17001 states. [2023-11-06 22:05:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17001 to 10741. [2023-11-06 22:05:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10741 states, 8698 states have (on average 1.3951483099563118) internal successors, (12135), 8748 states have internal predecessors, (12135), 1617 states have call successors, (1617), 425 states have call predecessors, (1617), 425 states have return successors, (1617), 1567 states have call predecessors, (1617), 1617 states have call successors, (1617) [2023-11-06 22:05:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10741 states to 10741 states and 15369 transitions. [2023-11-06 22:05:34,352 INFO L78 Accepts]: Start accepts. Automaton has 10741 states and 15369 transitions. Word has length 461 [2023-11-06 22:05:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:34,353 INFO L495 AbstractCegarLoop]: Abstraction has 10741 states and 15369 transitions. [2023-11-06 22:05:34,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.909090909090908) internal successors, (196), 22 states have internal predecessors, (196), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 4 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-06 22:05:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 10741 states and 15369 transitions. [2023-11-06 22:05:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:05:34,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:34,358 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:34,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:34,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:34,559 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:34,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:34,559 INFO L85 PathProgramCache]: Analyzing trace with hash 674564969, now seen corresponding path program 1 times [2023-11-06 22:05:34,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:34,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454757383] [2023-11-06 22:05:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:34,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:34,628 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:05:34,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879763108] [2023-11-06 22:05:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:34,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:34,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:34,630 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:34,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:05:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:37,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:05:37,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 5365 proven. 876 refuted. 0 times theorem prover too weak. 2603 trivial. 0 not checked. [2023-11-06 22:05:45,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:58,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:58,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454757383] [2023-11-06 22:05:58,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:05:58,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879763108] [2023-11-06 22:05:58,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879763108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:58,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:05:58,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-06 22:05:58,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690440607] [2023-11-06 22:05:58,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:58,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:05:58,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:05:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=604, Unknown=4, NotChecked=0, Total=812 [2023-11-06 22:05:58,621 INFO L87 Difference]: Start difference. First operand 10741 states and 15369 transitions. Second operand has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 20 states have internal predecessors, (159), 7 states have call successors, (67), 7 states have call predecessors, (67), 11 states have return successors, (67), 6 states have call predecessors, (67), 7 states have call successors, (67) [2023-11-06 22:06:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:06,098 INFO L93 Difference]: Finished difference Result 38621 states and 54601 transitions. [2023-11-06 22:06:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:06:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 20 states have internal predecessors, (159), 7 states have call successors, (67), 7 states have call predecessors, (67), 11 states have return successors, (67), 6 states have call predecessors, (67), 7 states have call successors, (67) Word has length 461 [2023-11-06 22:06:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:06,144 INFO L225 Difference]: With dead ends: 38621 [2023-11-06 22:06:06,144 INFO L226 Difference]: Without dead ends: 28193 [2023-11-06 22:06:06,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=521, Invalid=1367, Unknown=4, NotChecked=0, Total=1892 [2023-11-06 22:06:06,154 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 756 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:06,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 2050 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:06:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28193 states. [2023-11-06 22:06:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28193 to 22167. [2023-11-06 22:06:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22167 states, 18751 states have (on average 1.4101647912111355) internal successors, (26442), 18841 states have internal predecessors, (26442), 2627 states have call successors, (2627), 788 states have call predecessors, (2627), 788 states have return successors, (2627), 2537 states have call predecessors, (2627), 2627 states have call successors, (2627) [2023-11-06 22:06:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22167 states to 22167 states and 31696 transitions. [2023-11-06 22:06:09,812 INFO L78 Accepts]: Start accepts. Automaton has 22167 states and 31696 transitions. Word has length 461 [2023-11-06 22:06:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:09,813 INFO L495 AbstractCegarLoop]: Abstraction has 22167 states and 31696 transitions. [2023-11-06 22:06:09,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 20 states have internal predecessors, (159), 7 states have call successors, (67), 7 states have call predecessors, (67), 11 states have return successors, (67), 6 states have call predecessors, (67), 7 states have call successors, (67) [2023-11-06 22:06:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 22167 states and 31696 transitions. [2023-11-06 22:06:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:06:09,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:09,818 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:09,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:10,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:06:10,019 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:10,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1658827669, now seen corresponding path program 1 times [2023-11-06 22:06:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:10,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381709967] [2023-11-06 22:06:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:10,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:10,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:10,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73005079] [2023-11-06 22:06:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:10,178 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:10,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:06:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:12,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:06:12,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 3962 proven. 324 refuted. 0 times theorem prover too weak. 4558 trivial. 0 not checked. [2023-11-06 22:06:15,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 66 proven. 327 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-06 22:06:15,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381709967] [2023-11-06 22:06:15,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73005079] [2023-11-06 22:06:15,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73005079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:15,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-06 22:06:15,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801990770] [2023-11-06 22:06:15,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:15,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:06:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:06:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:06:15,932 INFO L87 Difference]: Start difference. First operand 22167 states and 31696 transitions. Second operand has 20 states, 20 states have (on average 10.3) internal successors, (206), 20 states have internal predecessors, (206), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 4 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-06 22:06:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:23,669 INFO L93 Difference]: Finished difference Result 50856 states and 73641 transitions. [2023-11-06 22:06:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:06:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.3) internal successors, (206), 20 states have internal predecessors, (206), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 4 states have call predecessors, (134), 6 states have call successors, (134) Word has length 461 [2023-11-06 22:06:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:23,719 INFO L225 Difference]: With dead ends: 50856 [2023-11-06 22:06:23,719 INFO L226 Difference]: Without dead ends: 33615 [2023-11-06 22:06:23,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=396, Invalid=1010, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:06:23,737 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 2018 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 2626 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:23,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2041 Valid, 2626 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 22:06:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2023-11-06 22:06:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 22167. [2023-11-06 22:06:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22167 states, 18751 states have (on average 1.409844808276892) internal successors, (26436), 18841 states have internal predecessors, (26436), 2627 states have call successors, (2627), 788 states have call predecessors, (2627), 788 states have return successors, (2627), 2537 states have call predecessors, (2627), 2627 states have call successors, (2627) [2023-11-06 22:06:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22167 states to 22167 states and 31690 transitions. [2023-11-06 22:06:28,267 INFO L78 Accepts]: Start accepts. Automaton has 22167 states and 31690 transitions. Word has length 461 [2023-11-06 22:06:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:28,267 INFO L495 AbstractCegarLoop]: Abstraction has 22167 states and 31690 transitions. [2023-11-06 22:06:28,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.3) internal successors, (206), 20 states have internal predecessors, (206), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 4 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-06 22:06:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 22167 states and 31690 transitions. [2023-11-06 22:06:28,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:06:28,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:28,272 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:28,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:28,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:06:28,474 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:28,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:28,474 INFO L85 PathProgramCache]: Analyzing trace with hash -605898645, now seen corresponding path program 1 times [2023-11-06 22:06:28,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:28,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038919352] [2023-11-06 22:06:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:28,544 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426901254] [2023-11-06 22:06:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:28,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:28,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:28,546 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:06:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:29,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:06:29,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 2682 proven. 162 refuted. 0 times theorem prover too weak. 6000 trivial. 0 not checked. [2023-11-06 22:06:30,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-06 22:06:30,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038919352] [2023-11-06 22:06:30,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:30,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426901254] [2023-11-06 22:06:30,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426901254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:30,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:31,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:06:31,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314179418] [2023-11-06 22:06:31,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:31,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:06:31,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:06:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:06:31,002 INFO L87 Difference]: Start difference. First operand 22167 states and 31690 transitions. Second operand has 12 states, 12 states have (on average 16.833333333333332) internal successors, (202), 12 states have internal predecessors, (202), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-06 22:06:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:35,123 INFO L93 Difference]: Finished difference Result 29194 states and 41716 transitions. [2023-11-06 22:06:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:06:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.833333333333332) internal successors, (202), 12 states have internal predecessors, (202), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) Word has length 462 [2023-11-06 22:06:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:35,143 INFO L225 Difference]: With dead ends: 29194 [2023-11-06 22:06:35,143 INFO L226 Difference]: Without dead ends: 11836 [2023-11-06 22:06:35,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:06:35,160 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1516 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:35,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 1374 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:06:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11836 states. [2023-11-06 22:06:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11836 to 11748. [2023-11-06 22:06:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11748 states, 9953 states have (on average 1.4039987943333667) internal successors, (13974), 10003 states have internal predecessors, (13974), 1359 states have call successors, (1359), 435 states have call predecessors, (1359), 435 states have return successors, (1359), 1309 states have call predecessors, (1359), 1359 states have call successors, (1359) [2023-11-06 22:06:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11748 states to 11748 states and 16692 transitions. [2023-11-06 22:06:37,864 INFO L78 Accepts]: Start accepts. Automaton has 11748 states and 16692 transitions. Word has length 462 [2023-11-06 22:06:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:37,865 INFO L495 AbstractCegarLoop]: Abstraction has 11748 states and 16692 transitions. [2023-11-06 22:06:37,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.833333333333332) internal successors, (202), 12 states have internal predecessors, (202), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-06 22:06:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 11748 states and 16692 transitions. [2023-11-06 22:06:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-06 22:06:37,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:37,869 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:37,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:38,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:06:38,079 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:38,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:38,080 INFO L85 PathProgramCache]: Analyzing trace with hash 348041513, now seen corresponding path program 1 times [2023-11-06 22:06:38,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:38,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956697002] [2023-11-06 22:06:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:38,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:38,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:38,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546267633] [2023-11-06 22:06:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:38,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:38,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:38,152 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:38,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6dd821-2be6-4230-b37b-56ed003ef333/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:06:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:41,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:06:41,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 5157 proven. 258 refuted. 0 times theorem prover too weak. 3429 trivial. 0 not checked. [2023-11-06 22:06:43,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:09,185 WARN L293 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 42 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:07:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 840 proven. 303 refuted. 0 times theorem prover too weak. 7701 trivial. 0 not checked. [2023-11-06 22:07:15,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956697002] [2023-11-06 22:07:15,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:07:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546267633] [2023-11-06 22:07:15,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546267633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:15,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:07:15,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2023-11-06 22:07:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33067309] [2023-11-06 22:07:15,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 22:07:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 22:07:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1138, Unknown=3, NotChecked=0, Total=1560 [2023-11-06 22:07:15,210 INFO L87 Difference]: Start difference. First operand 11748 states and 16692 transitions. Second operand has 40 states, 37 states have (on average 6.594594594594595) internal successors, (244), 34 states have internal predecessors, (244), 13 states have call successors, (93), 7 states have call predecessors, (93), 16 states have return successors, (94), 13 states have call predecessors, (94), 13 states have call successors, (94) [2023-11-06 22:07:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:22,772 INFO L93 Difference]: Finished difference Result 23607 states and 33223 transitions. [2023-11-06 22:07:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:07:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 6.594594594594595) internal successors, (244), 34 states have internal predecessors, (244), 13 states have call successors, (93), 7 states have call predecessors, (93), 16 states have return successors, (94), 13 states have call predecessors, (94), 13 states have call successors, (94) Word has length 462 [2023-11-06 22:07:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:22,798 INFO L225 Difference]: With dead ends: 23607 [2023-11-06 22:07:22,798 INFO L226 Difference]: Without dead ends: 12362 [2023-11-06 22:07:22,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 886 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1091, Invalid=2446, Unknown=3, NotChecked=0, Total=3540 [2023-11-06 22:07:22,811 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 628 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:22,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1750 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-06 22:07:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12362 states.