./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-29.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_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/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_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-29.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/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_e70901b0-910f-4d25-b08a-68cd36d83900/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 89fb3437dc022c4b5e6c8772f3270e161abf7529bebe371d9c5e10b428f306b8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:06:22,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:06:22,216 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:06:22,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:06:22,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:06:22,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:06:22,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:06:22,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:06:22,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:06:22,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:06:22,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:06:22,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:06:22,282 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:06:22,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:06:22,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:06:22,285 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:06:22,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:06:22,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:06:22,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:06:22,287 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:06:22,287 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:06:22,288 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:06:22,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:06:22,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:06:22,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:06:22,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:06:22,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:06:22,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:06:22,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:06:22,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:06:22,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:06:22,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:06:22,294 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:06:22,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:06:22,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:06:22,294 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:06:22,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:06:22,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:06:22,295 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:06:22,295 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_e70901b0-910f-4d25-b08a-68cd36d83900/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89fb3437dc022c4b5e6c8772f3270e161abf7529bebe371d9c5e10b428f306b8 [2023-11-06 23:06:22,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:06:22,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:06:22,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:06:22,599 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:06:22,599 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:06:22,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-29.i [2023-11-06 23:06:25,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:06:26,213 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:06:26,214 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-29.i [2023-11-06 23:06:26,224 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/data/46276a233/d2fa0b3bd727489aa0eb800b1869dfd9/FLAGe2737b30e [2023-11-06 23:06:26,239 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/data/46276a233/d2fa0b3bd727489aa0eb800b1869dfd9 [2023-11-06 23:06:26,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:06:26,243 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:06:26,244 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:06:26,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:06:26,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:06:26,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c05ba10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26, skipping insertion in model container [2023-11-06 23:06:26,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:06:26,441 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_e70901b0-910f-4d25-b08a-68cd36d83900/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-29.i[916,929] [2023-11-06 23:06:26,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:06:26,545 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:06:26,554 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_e70901b0-910f-4d25-b08a-68cd36d83900/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-29.i[916,929] [2023-11-06 23:06:26,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:06:26,642 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:06:26,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26 WrapperNode [2023-11-06 23:06:26,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:06:26,644 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:06:26,644 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:06:26,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:06:26,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,738 INFO L138 Inliner]: procedures = 26, calls = 51, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 267 [2023-11-06 23:06:26,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:06:26,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:06:26,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:06:26,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:06:26,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,782 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:06:26,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:06:26,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:06:26,805 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:06:26,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (1/1) ... [2023-11-06 23:06:26,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:06:26,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:26,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:06:26,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:06:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:06:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:06:26,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:06:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:06:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:06:26,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:06:27,084 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:06:27,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:06:27,813 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:06:27,824 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:06:27,824 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:06:27,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:27 BoogieIcfgContainer [2023-11-06 23:06:27,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:06:27,834 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:06:27,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:06:27,838 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:06:27,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:06:26" (1/3) ... [2023-11-06 23:06:27,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:27, skipping insertion in model container [2023-11-06 23:06:27,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26" (2/3) ... [2023-11-06 23:06:27,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:27, skipping insertion in model container [2023-11-06 23:06:27,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:27" (3/3) ... [2023-11-06 23:06:27,843 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-29.i [2023-11-06 23:06:27,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:06:27,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:06:27,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:06:27,923 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;@33b9a2f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:06:27,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:06:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 75 states have internal predecessors, (104), 38 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 23:06:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-06 23:06:27,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:27,950 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:27,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:27,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1930539331, now seen corresponding path program 1 times [2023-11-06 23:06:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:27,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951605231] [2023-11-06 23:06:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:27,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:28,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951605231] [2023-11-06 23:06:28,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:06:28,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639517260] [2023-11-06 23:06:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:28,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:28,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:28,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:06:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:28,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:06:28,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2023-11-06 23:06:28,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:28,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639517260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:28,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:28,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:06:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683175029] [2023-11-06 23:06:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:28,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:06:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:28,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:06:28,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:06:28,731 INFO L87 Difference]: Start difference. First operand has 115 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 75 states have internal predecessors, (104), 38 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-06 23:06:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:28,793 INFO L93 Difference]: Finished difference Result 223 states and 392 transitions. [2023-11-06 23:06:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:06:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 2 states have call successors, (38) Word has length 242 [2023-11-06 23:06:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:28,810 INFO L225 Difference]: With dead ends: 223 [2023-11-06 23:06:28,811 INFO L226 Difference]: Without dead ends: 111 [2023-11-06 23:06:28,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 241 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 23:06:28,824 INFO L413 NwaCegarLoop]: 173 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, 173 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 23:06:28,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:06:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-06 23:06:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-11-06 23:06:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 38 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 23:06:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 173 transitions. [2023-11-06 23:06:28,887 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 173 transitions. Word has length 242 [2023-11-06 23:06:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:28,888 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 173 transitions. [2023-11-06 23:06:28,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-06 23:06:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 173 transitions. [2023-11-06 23:06:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-06 23:06:28,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:28,896 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:28,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:29,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:06:29,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:29,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1739665931, now seen corresponding path program 1 times [2023-11-06 23:06:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:29,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760292868] [2023-11-06 23:06:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:29,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328492159] [2023-11-06 23:06:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:29,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:29,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:29,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:06:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:29,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:06:29,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:06:29,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:29,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760292868] [2023-11-06 23:06:29,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328492159] [2023-11-06 23:06:29,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328492159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:29,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:29,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:06:29,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448450786] [2023-11-06 23:06:29,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:06:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:06:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:06:29,591 INFO L87 Difference]: Start difference. First operand 111 states and 173 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:29,743 INFO L93 Difference]: Finished difference Result 321 states and 502 transitions. [2023-11-06 23:06:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:06:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 242 [2023-11-06 23:06:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:29,749 INFO L225 Difference]: With dead ends: 321 [2023-11-06 23:06:29,749 INFO L226 Difference]: Without dead ends: 213 [2023-11-06 23:06:29,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 240 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 23:06:29,751 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 150 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:29,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 437 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:06:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-06 23:06:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2023-11-06 23:06:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 132 states have internal predecessors, (174), 76 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 23:06:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 326 transitions. [2023-11-06 23:06:29,835 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 326 transitions. Word has length 242 [2023-11-06 23:06:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:29,840 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 326 transitions. [2023-11-06 23:06:29,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 326 transitions. [2023-11-06 23:06:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-06 23:06:29,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:29,856 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:29,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:30,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:30,062 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:30,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1070784555, now seen corresponding path program 1 times [2023-11-06 23:06:30,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:30,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408053433] [2023-11-06 23:06:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:30,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:30,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983013001] [2023-11-06 23:06:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:30,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:30,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:30,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:30,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:06:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:30,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:06:30,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:06:30,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:30,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408053433] [2023-11-06 23:06:30,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:30,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983013001] [2023-11-06 23:06:30,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983013001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:30,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:30,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:06:30,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101354067] [2023-11-06 23:06:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:06:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:06:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:06:30,543 INFO L87 Difference]: Start difference. First operand 211 states and 326 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:30,634 INFO L93 Difference]: Finished difference Result 425 states and 657 transitions. [2023-11-06 23:06:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:06:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 243 [2023-11-06 23:06:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:30,642 INFO L225 Difference]: With dead ends: 425 [2023-11-06 23:06:30,642 INFO L226 Difference]: Without dead ends: 217 [2023-11-06 23:06:30,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 241 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 23:06:30,648 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 155 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:30,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 353 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:06:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-06 23:06:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2023-11-06 23:06:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 136 states have (on average 1.2941176470588236) internal successors, (176), 136 states have internal predecessors, (176), 76 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 23:06:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 328 transitions. [2023-11-06 23:06:30,698 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 328 transitions. Word has length 243 [2023-11-06 23:06:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:30,700 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 328 transitions. [2023-11-06 23:06:30,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 328 transitions. [2023-11-06 23:06:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-11-06 23:06:30,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:30,706 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:30,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:30,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:30,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1169337719, now seen corresponding path program 1 times [2023-11-06 23:06:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:30,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640869859] [2023-11-06 23:06:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:30,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:31,006 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:31,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296073830] [2023-11-06 23:06:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:31,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:31,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:31,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:06:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:31,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:06:31,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 37 proven. 111 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2023-11-06 23:06:31,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2023-11-06 23:06:32,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:32,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640869859] [2023-11-06 23:06:32,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:32,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296073830] [2023-11-06 23:06:32,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296073830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:32,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:32,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:06:32,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906490107] [2023-11-06 23:06:32,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:32,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:06:32,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:06:32,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:06:32,059 INFO L87 Difference]: Start difference. First operand 215 states and 328 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-06 23:06:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:32,404 INFO L93 Difference]: Finished difference Result 431 states and 651 transitions. [2023-11-06 23:06:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:06:32,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) Word has length 244 [2023-11-06 23:06:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:32,408 INFO L225 Difference]: With dead ends: 431 [2023-11-06 23:06:32,408 INFO L226 Difference]: Without dead ends: 219 [2023-11-06 23:06:32,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 480 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:06:32,410 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 177 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:32,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 293 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:06:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-06 23:06:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 135. [2023-11-06 23:06:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 94 states have internal predecessors, (124), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 23:06:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 200 transitions. [2023-11-06 23:06:32,440 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 200 transitions. Word has length 244 [2023-11-06 23:06:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:32,441 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 200 transitions. [2023-11-06 23:06:32,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-06 23:06:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 200 transitions. [2023-11-06 23:06:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-11-06 23:06:32,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:32,446 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:32,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:32,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:32,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:32,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1537281675, now seen corresponding path program 1 times [2023-11-06 23:06:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:32,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220142890] [2023-11-06 23:06:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:32,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:32,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:32,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534880848] [2023-11-06 23:06:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:32,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:32,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:32,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:32,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:06:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:32,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:06:32,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:06:35,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:35,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:35,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220142890] [2023-11-06 23:06:35,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534880848] [2023-11-06 23:06:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534880848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:35,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:35,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:06:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099551095] [2023-11-06 23:06:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:35,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:06:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:35,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:06:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:06:35,759 INFO L87 Difference]: Start difference. First operand 135 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:36,422 INFO L93 Difference]: Finished difference Result 430 states and 627 transitions. [2023-11-06 23:06:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:06:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 244 [2023-11-06 23:06:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:36,426 INFO L225 Difference]: With dead ends: 430 [2023-11-06 23:06:36,426 INFO L226 Difference]: Without dead ends: 298 [2023-11-06 23:06:36,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:06:36,428 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 362 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:36,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1070 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:06:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-06 23:06:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 158. [2023-11-06 23:06:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 117 states have (on average 1.3504273504273505) internal successors, (158), 117 states have internal predecessors, (158), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 23:06:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 234 transitions. [2023-11-06 23:06:36,462 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 234 transitions. Word has length 244 [2023-11-06 23:06:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:36,466 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 234 transitions. [2023-11-06 23:06:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 234 transitions. [2023-11-06 23:06:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-11-06 23:06:36,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:36,472 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:36,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:36,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:36,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:36,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash 950475661, now seen corresponding path program 1 times [2023-11-06 23:06:36,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:36,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094398377] [2023-11-06 23:06:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:36,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:36,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524898811] [2023-11-06 23:06:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:36,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:36,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:36,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:36,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:06:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:36,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:06:36,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:06:39,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:39,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:39,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094398377] [2023-11-06 23:06:39,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:39,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524898811] [2023-11-06 23:06:39,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524898811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:39,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:39,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:06:39,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645095221] [2023-11-06 23:06:39,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:39,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:06:39,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:06:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:06:39,352 INFO L87 Difference]: Start difference. First operand 158 states and 234 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:39,962 INFO L93 Difference]: Finished difference Result 453 states and 660 transitions. [2023-11-06 23:06:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:06:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 244 [2023-11-06 23:06:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:39,966 INFO L225 Difference]: With dead ends: 453 [2023-11-06 23:06:39,966 INFO L226 Difference]: Without dead ends: 298 [2023-11-06 23:06:39,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:06:39,968 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 380 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:39,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 883 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:06:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-06 23:06:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 158. [2023-11-06 23:06:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 117 states have (on average 1.3504273504273505) internal successors, (158), 117 states have internal predecessors, (158), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 23:06:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 234 transitions. [2023-11-06 23:06:39,989 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 234 transitions. Word has length 244 [2023-11-06 23:06:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:39,994 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 234 transitions. [2023-11-06 23:06:39,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 234 transitions. [2023-11-06 23:06:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-11-06 23:06:40,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:40,000 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:40,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:40,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:06:40,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:40,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:40,207 INFO L85 PathProgramCache]: Analyzing trace with hash 537599855, now seen corresponding path program 1 times [2023-11-06 23:06:40,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:40,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002627145] [2023-11-06 23:06:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:40,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:40,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802919209] [2023-11-06 23:06:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:40,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:40,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:40,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:06:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:40,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:06:40,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 687 proven. 96 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2023-11-06 23:06:40,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 15 proven. 96 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2023-11-06 23:06:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002627145] [2023-11-06 23:06:41,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802919209] [2023-11-06 23:06:41,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802919209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:41,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:41,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 23:06:41,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978321785] [2023-11-06 23:06:41,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:41,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:06:41,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:06:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:06:41,065 INFO L87 Difference]: Start difference. First operand 158 states and 234 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-06 23:06:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:41,802 INFO L93 Difference]: Finished difference Result 413 states and 603 transitions. [2023-11-06 23:06:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:06:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) Word has length 244 [2023-11-06 23:06:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:41,806 INFO L225 Difference]: With dead ends: 413 [2023-11-06 23:06:41,806 INFO L226 Difference]: Without dead ends: 258 [2023-11-06 23:06:41,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 479 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:41,808 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 200 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:41,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 537 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:06:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-06 23:06:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 164. [2023-11-06 23:06:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 122 states have internal predecessors, (163), 38 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 23:06:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 239 transitions. [2023-11-06 23:06:41,841 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 239 transitions. Word has length 244 [2023-11-06 23:06:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:41,841 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 239 transitions. [2023-11-06 23:06:41,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-06 23:06:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 239 transitions. [2023-11-06 23:06:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 23:06:41,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:41,846 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:41,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:42,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:06:42,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:42,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash -463570672, now seen corresponding path program 1 times [2023-11-06 23:06:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:42,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611215425] [2023-11-06 23:06:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:42,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:42,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309373590] [2023-11-06 23:06:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:42,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:42,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:42,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:06:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:42,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:06:42,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:06:42,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:42,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611215425] [2023-11-06 23:06:42,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309373590] [2023-11-06 23:06:42,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309373590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:42,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:42,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:06:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241123425] [2023-11-06 23:06:42,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:42,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:06:42,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:06:42,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:06:42,382 INFO L87 Difference]: Start difference. First operand 164 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:42,464 INFO L93 Difference]: Finished difference Result 367 states and 534 transitions. [2023-11-06 23:06:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:06:42,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 245 [2023-11-06 23:06:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:42,471 INFO L225 Difference]: With dead ends: 367 [2023-11-06 23:06:42,472 INFO L226 Difference]: Without dead ends: 201 [2023-11-06 23:06:42,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 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 23:06:42,473 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 58 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:42,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 522 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:06:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-06 23:06:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 168. [2023-11-06 23:06:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 126 states have internal predecessors, (169), 38 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 23:06:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 245 transitions. [2023-11-06 23:06:42,494 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 245 transitions. Word has length 245 [2023-11-06 23:06:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:42,496 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 245 transitions. [2023-11-06 23:06:42,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:06:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 245 transitions. [2023-11-06 23:06:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 23:06:42,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:42,500 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:42,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 23:06:42,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:06:42,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:42,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1463252492, now seen corresponding path program 1 times [2023-11-06 23:06:42,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:42,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495742859] [2023-11-06 23:06:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:42,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:42,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689834683] [2023-11-06 23:06:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:42,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:42,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:06:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:43,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 23:06:43,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1220 proven. 426 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2023-11-06 23:06:46,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 69 proven. 456 refuted. 0 times theorem prover too weak. 2287 trivial. 0 not checked. [2023-11-06 23:06:57,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:57,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495742859] [2023-11-06 23:06:57,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:57,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689834683] [2023-11-06 23:06:57,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689834683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:57,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:57,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 47 [2023-11-06 23:06:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370893893] [2023-11-06 23:06:57,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:57,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 23:06:57,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:57,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 23:06:57,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=1544, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 23:06:57,224 INFO L87 Difference]: Start difference. First operand 168 states and 245 transitions. Second operand has 47 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 43 states have internal predecessors, (148), 12 states have call successors, (76), 7 states have call predecessors, (76), 14 states have return successors, (76), 12 states have call predecessors, (76), 12 states have call successors, (76) [2023-11-06 23:07:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:09,347 INFO L93 Difference]: Finished difference Result 1016 states and 1403 transitions. [2023-11-06 23:07:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-06 23:07:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 43 states have internal predecessors, (148), 12 states have call successors, (76), 7 states have call predecessors, (76), 14 states have return successors, (76), 12 states have call predecessors, (76), 12 states have call successors, (76) Word has length 245 [2023-11-06 23:07:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:09,365 INFO L225 Difference]: With dead ends: 1016 [2023-11-06 23:07:09,365 INFO L226 Difference]: Without dead ends: 851 [2023-11-06 23:07:09,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6753 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=4416, Invalid=12354, Unknown=0, NotChecked=0, Total=16770 [2023-11-06 23:07:09,376 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 2323 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 3094 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 2640 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:09,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2324 Valid, 2640 Invalid, 3540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3094 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-06 23:07:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2023-11-06 23:07:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 385. [2023-11-06 23:07:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 293 states have (on average 1.31740614334471) internal successors, (386), 293 states have internal predecessors, (386), 76 states have call successors, (76), 15 states have call predecessors, (76), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 23:07:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 538 transitions. [2023-11-06 23:07:09,452 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 538 transitions. Word has length 245 [2023-11-06 23:07:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:09,453 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 538 transitions. [2023-11-06 23:07:09,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 43 states have internal predecessors, (148), 12 states have call successors, (76), 7 states have call predecessors, (76), 14 states have return successors, (76), 12 states have call predecessors, (76), 12 states have call successors, (76) [2023-11-06 23:07:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 538 transitions. [2023-11-06 23:07:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 23:07:09,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:09,458 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:09,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:09,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:09,666 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:09,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1346896889, now seen corresponding path program 1 times [2023-11-06 23:07:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:09,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64202362] [2023-11-06 23:07:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:09,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:09,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:09,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001907909] [2023-11-06 23:07:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:09,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:09,710 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:09,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:07:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:09,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:07:10,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1203 proven. 78 refuted. 0 times theorem prover too weak. 1531 trivial. 0 not checked. [2023-11-06 23:07:10,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2023-11-06 23:07:10,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:10,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64202362] [2023-11-06 23:07:10,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:10,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001907909] [2023-11-06 23:07:10,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001907909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:10,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:10,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 23:07:10,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143017475] [2023-11-06 23:07:10,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:10,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:07:10,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:07:10,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:07:10,531 INFO L87 Difference]: Start difference. First operand 385 states and 538 transitions. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 3 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-11-06 23:07:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:11,389 INFO L93 Difference]: Finished difference Result 1043 states and 1416 transitions. [2023-11-06 23:07:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:07:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 3 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) Word has length 245 [2023-11-06 23:07:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:11,403 INFO L225 Difference]: With dead ends: 1043 [2023-11-06 23:07:11,403 INFO L226 Difference]: Without dead ends: 661 [2023-11-06 23:07:11,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:07:11,406 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 364 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:11,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 649 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:07:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-06 23:07:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 352. [2023-11-06 23:07:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 258 states have (on average 1.2751937984496124) internal successors, (329), 258 states have internal predecessors, (329), 76 states have call successors, (76), 17 states have call predecessors, (76), 17 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 23:07:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 481 transitions. [2023-11-06 23:07:11,481 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 481 transitions. Word has length 245 [2023-11-06 23:07:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:11,482 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 481 transitions. [2023-11-06 23:07:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 3 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-11-06 23:07:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 481 transitions. [2023-11-06 23:07:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 23:07:11,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:11,485 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:11,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:11,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:07:11,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:11,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -406800717, now seen corresponding path program 1 times [2023-11-06 23:07:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:11,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744788371] [2023-11-06 23:07:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:11,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:11,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:11,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432918287] [2023-11-06 23:07:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:11,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:11,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:11,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:11,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:07:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:12,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:07:12,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:07:13,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:13,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:13,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744788371] [2023-11-06 23:07:13,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:13,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432918287] [2023-11-06 23:07:13,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432918287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:13,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:13,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:07:13,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943449670] [2023-11-06 23:07:13,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:13,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:07:13,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:07:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:07:13,481 INFO L87 Difference]: Start difference. First operand 352 states and 481 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:13,925 INFO L93 Difference]: Finished difference Result 828 states and 1129 transitions. [2023-11-06 23:07:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:07:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 245 [2023-11-06 23:07:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:13,930 INFO L225 Difference]: With dead ends: 828 [2023-11-06 23:07:13,930 INFO L226 Difference]: Without dead ends: 479 [2023-11-06 23:07:13,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:07:13,936 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 284 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:13,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 771 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:07:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-06 23:07:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 395. [2023-11-06 23:07:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 301 states have (on average 1.2890365448504983) internal successors, (388), 301 states have internal predecessors, (388), 76 states have call successors, (76), 17 states have call predecessors, (76), 17 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 23:07:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 540 transitions. [2023-11-06 23:07:14,005 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 540 transitions. Word has length 245 [2023-11-06 23:07:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:14,005 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 540 transitions. [2023-11-06 23:07:14,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 540 transitions. [2023-11-06 23:07:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 23:07:14,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:14,008 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:14,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:14,221 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:14,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -993606731, now seen corresponding path program 1 times [2023-11-06 23:07:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157878868] [2023-11-06 23:07:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:14,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:14,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:14,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326408519] [2023-11-06 23:07:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:14,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:14,268 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:14,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:07:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:14,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:07:14,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:07:16,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:16,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:16,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157878868] [2023-11-06 23:07:16,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:16,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326408519] [2023-11-06 23:07:16,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326408519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:16,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:16,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:07:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553222493] [2023-11-06 23:07:16,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:16,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:07:16,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:16,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:07:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:07:16,346 INFO L87 Difference]: Start difference. First operand 395 states and 540 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:17,439 INFO L93 Difference]: Finished difference Result 871 states and 1186 transitions. [2023-11-06 23:07:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:07:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 245 [2023-11-06 23:07:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:17,444 INFO L225 Difference]: With dead ends: 871 [2023-11-06 23:07:17,444 INFO L226 Difference]: Without dead ends: 479 [2023-11-06 23:07:17,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:07:17,446 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 258 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:17,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 728 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:07:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-06 23:07:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 395. [2023-11-06 23:07:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 301 states have (on average 1.2890365448504983) internal successors, (388), 301 states have internal predecessors, (388), 76 states have call successors, (76), 17 states have call predecessors, (76), 17 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 23:07:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 540 transitions. [2023-11-06 23:07:17,510 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 540 transitions. Word has length 245 [2023-11-06 23:07:17,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:17,511 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 540 transitions. [2023-11-06 23:07:17,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 540 transitions. [2023-11-06 23:07:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-06 23:07:17,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:17,514 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:17,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:17,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:17,728 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:17,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:17,729 INFO L85 PathProgramCache]: Analyzing trace with hash 51507974, now seen corresponding path program 1 times [2023-11-06 23:07:17,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:17,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061277831] [2023-11-06 23:07:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:17,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:17,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942433533] [2023-11-06 23:07:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:17,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:17,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:17,767 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:17,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:07:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:18,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:07:18,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:07:18,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061277831] [2023-11-06 23:07:18,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942433533] [2023-11-06 23:07:18,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942433533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:18,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:07:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256222532] [2023-11-06 23:07:18,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:18,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:18,376 INFO L87 Difference]: Start difference. First operand 395 states and 540 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:18,719 INFO L93 Difference]: Finished difference Result 822 states and 1123 transitions. [2023-11-06 23:07:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:07:18,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 246 [2023-11-06 23:07:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:18,725 INFO L225 Difference]: With dead ends: 822 [2023-11-06 23:07:18,725 INFO L226 Difference]: Without dead ends: 614 [2023-11-06 23:07:18,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:07:18,727 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 140 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:18,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 598 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:07:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-11-06 23:07:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 504. [2023-11-06 23:07:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 363 states have (on average 1.2451790633608815) internal successors, (452), 363 states have internal predecessors, (452), 114 states have call successors, (114), 26 states have call predecessors, (114), 26 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-06 23:07:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 680 transitions. [2023-11-06 23:07:18,828 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 680 transitions. Word has length 246 [2023-11-06 23:07:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:18,829 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 680 transitions. [2023-11-06 23:07:18,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 680 transitions. [2023-11-06 23:07:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-06 23:07:18,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:18,832 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:18,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 23:07:19,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:07:19,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:19,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash 73783858, now seen corresponding path program 1 times [2023-11-06 23:07:19,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:19,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165485857] [2023-11-06 23:07:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:19,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:19,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:19,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370040276] [2023-11-06 23:07:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:19,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:19,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:19,084 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:19,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:07:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:19,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:07:19,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1220 proven. 426 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2023-11-06 23:07:23,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 42 proven. 384 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2023-11-06 23:07:27,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165485857] [2023-11-06 23:07:27,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370040276] [2023-11-06 23:07:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370040276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:27,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:27,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 43 [2023-11-06 23:07:27,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145742981] [2023-11-06 23:07:27,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:27,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:07:27,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:27,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:07:27,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1327, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 23:07:27,111 INFO L87 Difference]: Start difference. First operand 504 states and 680 transitions. Second operand has 43 states, 41 states have (on average 3.341463414634146) internal successors, (137), 39 states have internal predecessors, (137), 9 states have call successors, (74), 6 states have call predecessors, (74), 12 states have return successors, (75), 9 states have call predecessors, (75), 9 states have call successors, (75) [2023-11-06 23:07:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:30,371 INFO L93 Difference]: Finished difference Result 1187 states and 1606 transitions. [2023-11-06 23:07:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 23:07:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.341463414634146) internal successors, (137), 39 states have internal predecessors, (137), 9 states have call successors, (74), 6 states have call predecessors, (74), 12 states have return successors, (75), 9 states have call predecessors, (75), 9 states have call successors, (75) Word has length 246 [2023-11-06 23:07:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:30,378 INFO L225 Difference]: With dead ends: 1187 [2023-11-06 23:07:30,378 INFO L226 Difference]: Without dead ends: 795 [2023-11-06 23:07:30,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 448 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1748, Invalid=5058, Unknown=0, NotChecked=0, Total=6806 [2023-11-06 23:07:30,383 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 2309 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:30,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2309 Valid, 1076 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 23:07:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-11-06 23:07:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 521. [2023-11-06 23:07:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 379 states have (on average 1.2532981530343008) internal successors, (475), 379 states have internal predecessors, (475), 114 states have call successors, (114), 27 states have call predecessors, (114), 27 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-06 23:07:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 703 transitions. [2023-11-06 23:07:30,487 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 703 transitions. Word has length 246 [2023-11-06 23:07:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:30,488 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 703 transitions. [2023-11-06 23:07:30,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.341463414634146) internal successors, (137), 39 states have internal predecessors, (137), 9 states have call successors, (74), 6 states have call predecessors, (74), 12 states have return successors, (75), 9 states have call predecessors, (75), 9 states have call successors, (75) [2023-11-06 23:07:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 703 transitions. [2023-11-06 23:07:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-06 23:07:30,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:30,491 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:30,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:07:30,698 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:30,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1084901108, now seen corresponding path program 1 times [2023-11-06 23:07:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:30,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029677853] [2023-11-06 23:07:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:30,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:30,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:30,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886194742] [2023-11-06 23:07:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:30,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:30,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:30,743 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:30,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:07:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:31,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:07:31,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1337 proven. 138 refuted. 0 times theorem prover too weak. 1337 trivial. 0 not checked. [2023-11-06 23:07:32,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 42 proven. 69 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2023-11-06 23:07:33,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:33,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029677853] [2023-11-06 23:07:33,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:33,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886194742] [2023-11-06 23:07:33,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886194742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:33,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:33,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-11-06 23:07:33,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203629418] [2023-11-06 23:07:33,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:07:33,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:07:33,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:07:33,545 INFO L87 Difference]: Start difference. First operand 521 states and 703 transitions. Second operand has 24 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 6 states have call successors, (76), 4 states have call predecessors, (76), 6 states have return successors, (76), 6 states have call predecessors, (76), 6 states have call successors, (76) [2023-11-06 23:07:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:36,555 INFO L93 Difference]: Finished difference Result 1575 states and 2167 transitions. [2023-11-06 23:07:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 23:07:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 6 states have call successors, (76), 4 states have call predecessors, (76), 6 states have return successors, (76), 6 states have call predecessors, (76), 6 states have call successors, (76) Word has length 246 [2023-11-06 23:07:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:36,563 INFO L225 Difference]: With dead ends: 1575 [2023-11-06 23:07:36,564 INFO L226 Difference]: Without dead ends: 1166 [2023-11-06 23:07:36,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 23:07:36,568 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 626 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:36,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 1409 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 23:07:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2023-11-06 23:07:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 725. [2023-11-06 23:07:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 534 states have (on average 1.250936329588015) internal successors, (668), 534 states have internal predecessors, (668), 152 states have call successors, (152), 38 states have call predecessors, (152), 38 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-06 23:07:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 972 transitions. [2023-11-06 23:07:36,729 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 972 transitions. Word has length 246 [2023-11-06 23:07:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:36,730 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 972 transitions. [2023-11-06 23:07:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 6 states have call successors, (76), 4 states have call predecessors, (76), 6 states have return successors, (76), 6 states have call predecessors, (76), 6 states have call successors, (76) [2023-11-06 23:07:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 972 transitions. [2023-11-06 23:07:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-06 23:07:36,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:36,733 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:36,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:36,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:07:36,940 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:36,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash -615338488, now seen corresponding path program 1 times [2023-11-06 23:07:36,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:36,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859390457] [2023-11-06 23:07:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:36,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:36,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:36,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304789898] [2023-11-06 23:07:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:36,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:36,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:36,982 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:36,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:07:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:37,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:07:37,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-06 23:07:37,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:37,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859390457] [2023-11-06 23:07:37,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304789898] [2023-11-06 23:07:37,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304789898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:37,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:37,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:07:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423478145] [2023-11-06 23:07:37,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:37,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:07:37,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:07:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:07:37,639 INFO L87 Difference]: Start difference. First operand 725 states and 972 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:37,927 INFO L93 Difference]: Finished difference Result 1334 states and 1798 transitions. [2023-11-06 23:07:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 247 [2023-11-06 23:07:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:37,933 INFO L225 Difference]: With dead ends: 1334 [2023-11-06 23:07:37,933 INFO L226 Difference]: Without dead ends: 725 [2023-11-06 23:07:37,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 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 23:07:37,936 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 136 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:37,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 165 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:07:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2023-11-06 23:07:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 725. [2023-11-06 23:07:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 534 states have (on average 1.2284644194756553) internal successors, (656), 534 states have internal predecessors, (656), 152 states have call successors, (152), 38 states have call predecessors, (152), 38 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-06 23:07:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 960 transitions. [2023-11-06 23:07:38,089 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 960 transitions. Word has length 247 [2023-11-06 23:07:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:38,089 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 960 transitions. [2023-11-06 23:07:38,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (38), 1 states have call predecessors, (38), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2023-11-06 23:07:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 960 transitions. [2023-11-06 23:07:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-06 23:07:38,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:38,092 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:38,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 23:07:38,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:07:38,299 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:38,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1295396858, now seen corresponding path program 1 times [2023-11-06 23:07:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459391487] [2023-11-06 23:07:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:38,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:38,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904282407] [2023-11-06 23:07:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:38,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:38,369 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:38,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70901b0-910f-4d25-b08a-68cd36d83900/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:07:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:38,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-06 23:07:38,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1127 proven. 606 refuted. 0 times theorem prover too weak. 1079 trivial. 0 not checked. [2023-11-06 23:07:45,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:30,005 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse66 (mod c_~var_1_1~0 256))) (let ((.cse67 (= .cse66 0)) (.cse1 (mod c_~var_1_14~0 256))) (let ((.cse4 (mod c_~var_1_13~0 65536)) (.cse12 (+ 256 .cse1)) (.cse21 (+ 246 .cse1)) (.cse3 (= (mod c_~last_1_var_1_30~0 256) 0)) (.cse2 (mod c_~var_1_12~0 65536)) (.cse46 (not .cse67)) (.cse65 (mod c_~var_1_5~0 256)) (.cse0 (mod c_~var_1_17~0 65536)) (.cse7 (mod c_~var_1_15~0 256))) (and (or (< .cse0 (+ .cse1 1)) (= (mod (+ c_~var_1_13~0 c_~var_1_17~0 (* 65535 (mod c_~var_1_11~0 256))) 65536) .cse2) (not (= .cse0 (mod c_~var_1_18~0 256)))) (or .cse3 (< .cse4 257)) (or (let ((.cse29 (* 254 .cse1)) (.cse28 (* .cse1 (- 255))) (.cse27 (* .cse7 255))) (and (forall ((v_z_251 Int) (v_y_251 Int)) (let ((.cse6 (+ .cse7 v_z_251)) (.cse5 (+ (* 255 v_z_251) (* 256 v_y_251)))) (or (< .cse5 0) (< v_z_251 0) (< 255 .cse6) (= .cse6 .cse1) (< 255 .cse5)))) (or (and (forall ((v_z_237 Int) (v_y_237 Int)) (let ((.cse9 (+ .cse7 v_z_237)) (.cse8 (+ (* 255 v_z_237) (* 256 v_y_237)))) (or (< 255 .cse8) (= .cse9 .cse1) (< 255 .cse9) (< .cse8 0) (< v_z_237 0)))) (forall ((v_z_237 Int) (v_y_237 Int)) (let ((.cse10 (+ (* 255 v_z_237) (* 256 v_y_237))) (.cse11 (+ .cse7 v_z_237))) (or (< 255 .cse10) (= .cse11 .cse1) (< 255 v_z_237) (< .cse10 0) (< v_z_237 0) (= .cse11 .cse12)))) (forall ((v_z_236 Int) (v_y_236 Int)) (let ((.cse13 (+ .cse7 v_z_236)) (.cse14 (+ (* 255 v_z_236) (* 256 v_y_236)))) (or (< 255 v_z_236) (< .cse13 256) (< .cse14 0) (= .cse13 .cse12) (< 245 .cse14)))) (forall ((v_z_236 Int) (v_y_236 Int)) (let ((.cse16 (+ .cse7 v_z_236)) (.cse15 (+ (* 255 v_z_236) (* 256 v_y_236)))) (or (< v_z_236 0) (< 255 v_z_236) (< .cse15 0) (= .cse16 .cse12) (= .cse16 .cse1) (< 245 .cse15)))) (forall ((v_z_236 Int) (v_y_236 Int)) (let ((.cse17 (+ (* 255 v_z_236) (* 256 v_y_236))) (.cse18 (+ .cse7 v_z_236))) (or (< v_z_236 0) (< .cse17 0) (= .cse18 .cse1) (< 245 .cse17) (< 255 .cse18)))) (forall ((v_z_237 Int) (v_y_237 Int)) (let ((.cse19 (+ (* 255 v_z_237) (* 256 v_y_237))) (.cse20 (+ .cse7 v_z_237))) (or (< 255 .cse19) (< 255 v_z_237) (< .cse19 0) (= .cse20 .cse12) (< .cse20 256)))) (forall ((v_z_234 Int) (v_y_234 Int)) (let ((.cse22 (+ (* 255 v_z_234) (* 256 v_y_234)))) (or (< v_z_234 0) (= .cse21 .cse22) (< 255 v_z_234) (< 255 .cse22) (< .cse22 246)))) (forall ((v_z_234 Int) (v_y_234 Int)) (let ((.cse23 (+ .cse7 v_z_234)) (.cse24 (+ (* 255 v_z_234) (* 256 v_y_234)))) (or (= .cse23 .cse1) (< v_z_234 0) (< 255 .cse23) (< 255 .cse24) (< .cse24 246)))) (forall ((v_z_234 Int) (v_y_234 Int)) (let ((.cse25 (+ (* 255 v_z_234) (* 256 v_y_234)))) (or (= .cse21 .cse25) (< 255 v_z_234) (< 255 .cse25) (< .cse25 246) (< (+ .cse7 v_z_234) 256))))) (= .cse4 256)) (forall ((v_y_250 Int) (v_z_250 Int)) (let ((.cse26 (+ (* 256 v_y_250) (* 255 v_z_250)))) (or (< 255 (+ .cse7 v_z_250)) (< .cse26 246) (< v_z_250 0) (= .cse26 .cse21) (< 255 .cse26)))) (<= .cse27 (+ (* 256 (div (+ 245 .cse28 .cse27) 256)) .cse29 10)) (forall ((v_z_248 Int) (v_y_248 Int)) (let ((.cse31 (* 255 v_z_248)) (.cse32 (* 256 v_y_248))) (let ((.cse30 (+ .cse31 .cse32))) (or (< .cse30 0) (< 255 v_z_248) (< (+ .cse7 v_z_248) 256) (= (+ .cse31 10 .cse32) .cse1) (< 245 .cse30))))) (forall ((v_z_251 Int) (v_y_251 Int)) (let ((.cse34 (+ .cse7 v_z_251)) (.cse33 (+ (* 255 v_z_251) (* 256 v_y_251)))) (or (< .cse33 0) (= .cse34 .cse12) (< .cse34 256) (< 255 v_z_251) (< 255 .cse33)))) (forall ((v_y_250 Int) (v_z_250 Int)) (let ((.cse35 (+ (* 256 v_y_250) (* 255 v_z_250)))) (or (< 255 v_z_250) (< .cse35 246) (< v_z_250 0) (= .cse35 .cse21) (< 255 .cse35)))) (<= (+ 65290 .cse29 (* 256 (div (+ (- 65035) .cse28 .cse27) 256))) .cse27) (forall ((v_z_251 Int) (v_y_251 Int)) (let ((.cse37 (+ .cse7 v_z_251)) (.cse36 (+ (* 255 v_z_251) (* 256 v_y_251)))) (or (< .cse36 0) (= .cse37 .cse12) (< v_z_251 0) (< 255 v_z_251) (= .cse37 .cse1) (< 255 .cse36)))) (forall ((v_y_250 Int) (v_z_250 Int)) (let ((.cse38 (+ .cse7 v_z_250)) (.cse39 (+ (* 256 v_y_250) (* 255 v_z_250)))) (or (< .cse38 256) (< 255 v_z_250) (< .cse39 246) (= .cse12 .cse38) (< 255 .cse39)))) (forall ((v_z_248 Int) (v_y_248 Int)) (let ((.cse41 (* 255 v_z_248)) (.cse42 (* 256 v_y_248))) (let ((.cse40 (+ .cse41 .cse42))) (or (< .cse40 0) (< v_z_248 0) (< 255 v_z_248) (= (+ .cse41 10 .cse42) .cse1) (< 245 .cse40))))) (forall ((v_z_248 Int) (v_y_248 Int)) (let ((.cse44 (* 255 v_z_248)) (.cse45 (* 256 v_y_248))) (let ((.cse43 (+ .cse44 .cse45))) (or (< 255 (+ .cse7 v_z_248)) (< .cse43 0) (< v_z_248 0) (= (+ .cse44 10 .cse45) .cse1) (< 245 .cse43))))))) .cse3) (not (= (mod c_~last_1_var_1_27~0 256) (mod c_~last_1_var_1_17~0 65536))) (or .cse46 (= .cse0 .cse1)) (or (< .cse4 1) (and (forall ((v_y_217 Int) (v_z_217 Int)) (let ((.cse47 (+ .cse7 v_z_217)) (.cse48 (+ (* 255 v_z_217) (* 256 v_y_217)))) (or (= .cse12 .cse47) (= .cse47 .cse1) (< v_z_217 0) (< 245 .cse48) (< 255 v_z_217) (< .cse48 0)))) (forall ((v_z_220 Int) (v_y_220 Int)) (let ((.cse50 (* 255 v_z_220)) (.cse51 (* 256 v_y_220))) (let ((.cse49 (+ .cse50 .cse51))) (or (= .cse21 .cse49) (< 255 (+ .cse7 v_z_220)) (< 255 .cse49) (< .cse49 0) (= (+ .cse50 .cse51 10) .cse1) (< v_z_220 0))))) (forall ((v_y_219 Int) (v_z_219 Int)) (let ((.cse52 (+ (* 255 v_z_219) (* 256 v_y_219)))) (or (< .cse52 246) (< v_z_219 0) (< 255 .cse52) (= .cse21 .cse52) (< 255 v_z_219)))) (forall ((v_y_217 Int) (v_z_217 Int)) (let ((.cse53 (+ .cse7 v_z_217)) (.cse54 (+ (* 255 v_z_217) (* 256 v_y_217)))) (or (= .cse53 .cse1) (< v_z_217 0) (< 245 .cse54) (< 255 .cse53) (< .cse54 0)))) (forall ((v_y_219 Int) (v_z_219 Int)) (let ((.cse55 (+ (* 255 v_z_219) (* 256 v_y_219)))) (or (< 255 (+ .cse7 v_z_219)) (< .cse55 246) (< v_z_219 0) (< 255 .cse55) (= .cse21 .cse55)))) (forall ((v_z_220 Int) (v_y_220 Int)) (let ((.cse56 (+ .cse7 v_z_220)) (.cse57 (+ (* 255 v_z_220) (* 256 v_y_220)))) (or (< .cse56 256) (= .cse56 .cse12) (< 255 v_z_220) (< 255 .cse57) (< .cse57 0)))) (forall ((v_y_217 Int) (v_z_217 Int)) (let ((.cse59 (+ (* 255 v_z_217) (* 256 v_y_217))) (.cse58 (+ .cse7 v_z_217))) (or (= .cse12 .cse58) (< 245 .cse59) (< 255 v_z_217) (< .cse59 0) (< .cse58 256)))) (forall ((v_y_219 Int) (v_z_219 Int)) (let ((.cse60 (+ (* 255 v_z_219) (* 256 v_y_219))) (.cse61 (+ .cse7 v_z_219))) (or (< .cse60 246) (= .cse61 .cse12) (< 255 .cse60) (< .cse61 256) (< 255 v_z_219)))) (forall ((v_z_220 Int) (v_y_220 Int)) (let ((.cse63 (* 255 v_z_220)) (.cse64 (* 256 v_y_220))) (let ((.cse62 (+ .cse63 .cse64))) (or (= .cse21 .cse62) (< 255 v_z_220) (< 255 .cse62) (< .cse62 0) (= (+ .cse63 .cse64 10) .cse1) (< v_z_220 0)))))) .cse3) (or (= .cse65 0) (= (mod c_~var_1_6~0 256) .cse66)) (or (forall ((v_z_200 Int)) (or (< 65535 v_z_200) (< v_z_200 0) (< .cse2 (+ (mod .cse1 v_z_200) 1)))) .cse46) (= .cse65 .cse66) (or (= .cse0 .cse7) .cse67))))) is different from false [2023-11-06 23:10:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 90 proven. 531 refuted. 0 times theorem prover too weak. 2191 trivial. 0 not checked. [2023-11-06 23:10:14,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:14,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459391487] [2023-11-06 23:10:14,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:14,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904282407] [2023-11-06 23:10:14,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904282407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:14,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:14,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2023-11-06 23:10:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564582481] [2023-11-06 23:10:14,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-06 23:10:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-06 23:10:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1042, Invalid=3109, Unknown=13, NotChecked=126, Total=4290 [2023-11-06 23:10:14,347 INFO L87 Difference]: Start difference. First operand 725 states and 960 transitions. Second operand has 66 states, 63 states have (on average 2.5873015873015874) internal successors, (163), 60 states have internal predecessors, (163), 17 states have call successors, (76), 10 states have call predecessors, (76), 18 states have return successors, (76), 17 states have call predecessors, (76), 17 states have call successors, (76)