./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-33.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-33.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3afcdc3badcfc017ac06c7d51deba84caf5317196fc02e040e398bba430217dd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:42,642 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:42,766 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:42,773 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:42,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:42,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:42,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:42,813 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:42,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:42,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:42,820 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:42,821 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:42,821 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:42,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:42,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:42,824 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:42,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:42,825 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:42,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:42,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:42,826 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:42,826 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:42,827 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:42,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:42,828 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:42,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:42,829 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:42,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:42,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:42,830 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:42,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:42,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:42,832 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:42,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:42,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:42,833 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:42,833 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:42,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:42,834 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:42,834 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_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3afcdc3badcfc017ac06c7d51deba84caf5317196fc02e040e398bba430217dd [2023-11-19 08:05:43,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:43,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:43,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:43,240 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:43,241 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:43,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-33.i [2023-11-19 08:05:46,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:46,656 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:46,656 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-33.i [2023-11-19 08:05:46,675 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/data/7fb11c108/9339c7d20c94406f9d81731804a57286/FLAG06c6b1e37 [2023-11-19 08:05:46,691 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/data/7fb11c108/9339c7d20c94406f9d81731804a57286 [2023-11-19 08:05:46,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:46,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:46,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:46,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:46,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:46,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:46,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdd73e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46, skipping insertion in model container [2023-11-19 08:05:46,717 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:46,797 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:46,967 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_aad29473-6e1d-496b-9164-6c9de322f3ba/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-33.i[916,929] [2023-11-19 08:05:47,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:47,231 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:47,245 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_aad29473-6e1d-496b-9164-6c9de322f3ba/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-33.i[916,929] [2023-11-19 08:05:47,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:47,430 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:47,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47 WrapperNode [2023-11-19 08:05:47,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:47,432 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:47,433 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:47,433 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:47,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,635 INFO L138 Inliner]: procedures = 26, calls = 135, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1010 [2023-11-19 08:05:47,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:47,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:47,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:47,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:47,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,711 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,742 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,752 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:47,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:47,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:47,805 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:47,806 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (1/1) ... [2023-11-19 08:05:47,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:47,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:47,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:47,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:47,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:47,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:05:47,899 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:05:47,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:47,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:47,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:48,106 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:48,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:49,546 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:49,567 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:49,567 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:05:49,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:49 BoogieIcfgContainer [2023-11-19 08:05:49,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:49,585 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:49,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:49,588 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:49,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:46" (1/3) ... [2023-11-19 08:05:49,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0f745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:49, skipping insertion in model container [2023-11-19 08:05:49,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:47" (2/3) ... [2023-11-19 08:05:49,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0f745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:49, skipping insertion in model container [2023-11-19 08:05:49,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:49" (3/3) ... [2023-11-19 08:05:49,593 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-33.i [2023-11-19 08:05:49,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:49,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:05:49,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:49,709 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2435333, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:49,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:05:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.62890625) internal successors, (417), 257 states have internal predecessors, (417), 122 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-19 08:05:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-11-19 08:05:49,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:49,775 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:49,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:49,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:49,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1482987338, now seen corresponding path program 1 times [2023-11-19 08:05:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:49,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842139447] [2023-11-19 08:05:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:50,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:50,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842139447] [2023-11-19 08:05:50,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:05:50,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940785478] [2023-11-19 08:05:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:50,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:50,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:50,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:50,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:51,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:05:51,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 29282 trivial. 0 not checked. [2023-11-19 08:05:51,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:51,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940785478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:51,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:51,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869136023] [2023-11-19 08:05:51,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:05:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:05:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:05:51,368 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.62890625) internal successors, (417), 257 states have internal predecessors, (417), 122 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (122), 2 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-19 08:05:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:51,519 INFO L93 Difference]: Finished difference Result 752 states and 1433 transitions. [2023-11-19 08:05:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:05:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (122), 2 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 2 states have call successors, (122) Word has length 778 [2023-11-19 08:05:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:51,544 INFO L225 Difference]: With dead ends: 752 [2023-11-19 08:05:51,544 INFO L226 Difference]: Without dead ends: 374 [2023-11-19 08:05:51,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:05:51,561 INFO L413 NwaCegarLoop]: 644 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, 644 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:51,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-19 08:05:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-19 08:05:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 250 states have (on average 1.6) internal successors, (400), 250 states have internal predecessors, (400), 122 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-19 08:05:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 644 transitions. [2023-11-19 08:05:51,711 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 644 transitions. Word has length 778 [2023-11-19 08:05:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:51,714 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 644 transitions. [2023-11-19 08:05:51,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (122), 2 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-19 08:05:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 644 transitions. [2023-11-19 08:05:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-11-19 08:05:51,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:51,747 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:51,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:51,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:51,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1135673018, now seen corresponding path program 1 times [2023-11-19 08:05:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:51,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215941526] [2023-11-19 08:05:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:52,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:52,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397654593] [2023-11-19 08:05:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:52,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:52,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:52,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:52,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:05:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:52,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:05:52,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29524 trivial. 0 not checked. [2023-11-19 08:05:52,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:52,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:52,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215941526] [2023-11-19 08:05:52,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397654593] [2023-11-19 08:05:52,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397654593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:52,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:52,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:52,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848040373] [2023-11-19 08:05:52,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:52,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:52,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:52,920 INFO L87 Difference]: Start difference. First operand 374 states and 644 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:05:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:53,038 INFO L93 Difference]: Finished difference Result 926 states and 1600 transitions. [2023-11-19 08:05:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:53,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) Word has length 778 [2023-11-19 08:05:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:53,048 INFO L225 Difference]: With dead ends: 926 [2023-11-19 08:05:53,049 INFO L226 Difference]: Without dead ends: 555 [2023-11-19 08:05:53,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:53,052 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 300 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:53,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1267 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-11-19 08:05:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 552. [2023-11-19 08:05:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 389 states have (on average 1.6323907455012854) internal successors, (635), 390 states have internal predecessors, (635), 160 states have call successors, (160), 2 states have call predecessors, (160), 2 states have return successors, (160), 159 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-19 08:05:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 955 transitions. [2023-11-19 08:05:53,139 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 955 transitions. Word has length 778 [2023-11-19 08:05:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:53,143 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 955 transitions. [2023-11-19 08:05:53,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:05:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 955 transitions. [2023-11-19 08:05:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-11-19 08:05:53,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:53,174 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:53,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:53,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:53,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:53,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash -191313218, now seen corresponding path program 1 times [2023-11-19 08:05:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234004161] [2023-11-19 08:05:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:53,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:53,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:53,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420161472] [2023-11-19 08:05:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:53,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:53,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:53,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:05:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:54,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:05:54,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 14811 proven. 168 refuted. 0 times theorem prover too weak. 14545 trivial. 0 not checked. [2023-11-19 08:05:54,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 195 proven. 168 refuted. 0 times theorem prover too weak. 29161 trivial. 0 not checked. [2023-11-19 08:05:55,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234004161] [2023-11-19 08:05:55,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420161472] [2023-11-19 08:05:55,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420161472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:55,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:05:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30642063] [2023-11-19 08:05:55,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:55,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:55,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:55,545 INFO L87 Difference]: Start difference. First operand 552 states and 955 transitions. Second operand has 7 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 2 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 2 states have call predecessors, (179), 2 states have call successors, (179) [2023-11-19 08:05:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:56,324 INFO L93 Difference]: Finished difference Result 1111 states and 1916 transitions. [2023-11-19 08:05:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:05:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 2 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 2 states have call predecessors, (179), 2 states have call successors, (179) Word has length 778 [2023-11-19 08:05:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:56,333 INFO L225 Difference]: With dead ends: 1111 [2023-11-19 08:05:56,333 INFO L226 Difference]: Without dead ends: 562 [2023-11-19 08:05:56,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1558 GetRequests, 1548 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:05:56,337 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 408 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:56,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1296 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:05:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-19 08:05:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 556. [2023-11-19 08:05:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 392 states have (on average 1.6224489795918366) internal successors, (636), 393 states have internal predecessors, (636), 160 states have call successors, (160), 3 states have call predecessors, (160), 3 states have return successors, (160), 159 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-19 08:05:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 956 transitions. [2023-11-19 08:05:56,430 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 956 transitions. Word has length 778 [2023-11-19 08:05:56,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:56,433 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 956 transitions. [2023-11-19 08:05:56,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 2 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 2 states have call predecessors, (179), 2 states have call successors, (179) [2023-11-19 08:05:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 956 transitions. [2023-11-19 08:05:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-11-19 08:05:56,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:56,443 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:56,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:56,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:56,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:56,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:56,660 INFO L85 PathProgramCache]: Analyzing trace with hash 695909628, now seen corresponding path program 1 times [2023-11-19 08:05:56,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:56,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610458838] [2023-11-19 08:05:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:56,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:56,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:56,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295195631] [2023-11-19 08:05:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:56,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:56,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:56,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:05:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:57,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:05:57,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 14013 proven. 225 refuted. 0 times theorem prover too weak. 15286 trivial. 0 not checked. [2023-11-19 08:05:58,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 138 proven. 225 refuted. 0 times theorem prover too weak. 29161 trivial. 0 not checked. [2023-11-19 08:05:58,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610458838] [2023-11-19 08:05:58,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295195631] [2023-11-19 08:05:58,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295195631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:58,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:05:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673467917] [2023-11-19 08:05:58,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:58,723 INFO L87 Difference]: Start difference. First operand 556 states and 956 transitions. Second operand has 7 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 2 states have call successors, (197), 2 states have call predecessors, (197), 4 states have return successors, (198), 2 states have call predecessors, (198), 2 states have call successors, (198) [2023-11-19 08:05:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:59,562 INFO L93 Difference]: Finished difference Result 1119 states and 1918 transitions. [2023-11-19 08:05:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:05:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 2 states have call successors, (197), 2 states have call predecessors, (197), 4 states have return successors, (198), 2 states have call predecessors, (198), 2 states have call successors, (198) Word has length 778 [2023-11-19 08:05:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:59,570 INFO L225 Difference]: With dead ends: 1119 [2023-11-19 08:05:59,570 INFO L226 Difference]: Without dead ends: 566 [2023-11-19 08:05:59,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1558 GetRequests, 1548 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:05:59,574 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 681 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:59,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1268 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:05:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-19 08:05:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 560. [2023-11-19 08:05:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 395 states have (on average 1.6126582278481012) internal successors, (637), 396 states have internal predecessors, (637), 160 states have call successors, (160), 4 states have call predecessors, (160), 4 states have return successors, (160), 159 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-19 08:05:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 957 transitions. [2023-11-19 08:05:59,654 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 957 transitions. Word has length 778 [2023-11-19 08:05:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:59,657 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 957 transitions. [2023-11-19 08:05:59,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 2 states have call successors, (197), 2 states have call predecessors, (197), 4 states have return successors, (198), 2 states have call predecessors, (198), 2 states have call successors, (198) [2023-11-19 08:05:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 957 transitions. [2023-11-19 08:05:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2023-11-19 08:05:59,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:59,667 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:59,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:59,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:59,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:59,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash 791436284, now seen corresponding path program 1 times [2023-11-19 08:05:59,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:59,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045543838] [2023-11-19 08:05:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:59,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:00,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:00,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353796557] [2023-11-19 08:06:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:00,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:00,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:00,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:00,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:06:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:00,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:06:00,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29524 trivial. 0 not checked. [2023-11-19 08:06:00,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:00,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:00,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045543838] [2023-11-19 08:06:00,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:00,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353796557] [2023-11-19 08:06:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353796557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:00,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:00,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724077136] [2023-11-19 08:06:00,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:00,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:00,683 INFO L87 Difference]: Start difference. First operand 560 states and 957 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:06:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:00,792 INFO L93 Difference]: Finished difference Result 1674 states and 2865 transitions. [2023-11-19 08:06:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) Word has length 779 [2023-11-19 08:06:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:00,804 INFO L225 Difference]: With dead ends: 1674 [2023-11-19 08:06:00,804 INFO L226 Difference]: Without dead ends: 1117 [2023-11-19 08:06:00,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:00,808 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 632 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:00,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1332 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2023-11-19 08:06:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1115. [2023-11-19 08:06:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 786 states have (on average 1.60941475826972) internal successors, (1265), 788 states have internal predecessors, (1265), 320 states have call successors, (320), 8 states have call predecessors, (320), 8 states have return successors, (320), 318 states have call predecessors, (320), 320 states have call successors, (320) [2023-11-19 08:06:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1905 transitions. [2023-11-19 08:06:01,056 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1905 transitions. Word has length 779 [2023-11-19 08:06:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:01,057 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1905 transitions. [2023-11-19 08:06:01,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:06:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1905 transitions. [2023-11-19 08:06:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2023-11-19 08:06:01,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:01,068 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:01,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:01,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:01,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:01,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1352136062, now seen corresponding path program 1 times [2023-11-19 08:06:01,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:01,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785700741] [2023-11-19 08:06:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:01,456 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:01,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514918300] [2023-11-19 08:06:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:01,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:01,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:01,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:06:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:02,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:06:02,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 14793 proven. 195 refuted. 0 times theorem prover too weak. 14536 trivial. 0 not checked. [2023-11-19 08:06:02,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 168 proven. 195 refuted. 0 times theorem prover too weak. 29161 trivial. 0 not checked. [2023-11-19 08:06:03,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:03,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785700741] [2023-11-19 08:06:03,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514918300] [2023-11-19 08:06:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514918300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:03,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 08:06:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261678129] [2023-11-19 08:06:03,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:03,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:06:03,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:06:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:06:03,663 INFO L87 Difference]: Start difference. First operand 1115 states and 1905 transitions. Second operand has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 3 states have call successors, (187), 2 states have call predecessors, (187), 4 states have return successors, (188), 3 states have call predecessors, (188), 3 states have call successors, (188) [2023-11-19 08:06:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:05,301 INFO L93 Difference]: Finished difference Result 3099 states and 5288 transitions. [2023-11-19 08:06:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:06:05,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 3 states have call successors, (187), 2 states have call predecessors, (187), 4 states have return successors, (188), 3 states have call predecessors, (188), 3 states have call successors, (188) Word has length 779 [2023-11-19 08:06:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:05,319 INFO L225 Difference]: With dead ends: 3099 [2023-11-19 08:06:05,319 INFO L226 Difference]: Without dead ends: 1987 [2023-11-19 08:06:05,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1567 GetRequests, 1548 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2023-11-19 08:06:05,329 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 1889 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:05,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1981 Valid, 1770 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 08:06:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2023-11-19 08:06:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1897. [2023-11-19 08:06:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1418 states have (on average 1.6375176304654442) internal successors, (2322), 1424 states have internal predecessors, (2322), 464 states have call successors, (464), 14 states have call predecessors, (464), 14 states have return successors, (464), 458 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-19 08:06:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3250 transitions. [2023-11-19 08:06:05,652 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3250 transitions. Word has length 779 [2023-11-19 08:06:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:05,654 INFO L495 AbstractCegarLoop]: Abstraction has 1897 states and 3250 transitions. [2023-11-19 08:06:05,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 3 states have call successors, (187), 2 states have call predecessors, (187), 4 states have return successors, (188), 3 states have call predecessors, (188), 3 states have call successors, (188) [2023-11-19 08:06:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3250 transitions. [2023-11-19 08:06:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2023-11-19 08:06:05,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:05,666 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:05,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:05,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:05,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:05,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1665048408, now seen corresponding path program 1 times [2023-11-19 08:06:05,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:05,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349753738] [2023-11-19 08:06:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:05,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:05,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:05,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618116060] [2023-11-19 08:06:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:06,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:06,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:06,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:06:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:06,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:06:06,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29524 trivial. 0 not checked. [2023-11-19 08:06:06,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349753738] [2023-11-19 08:06:06,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618116060] [2023-11-19 08:06:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618116060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:06,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:06,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:06:06,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492196965] [2023-11-19 08:06:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:06,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:06,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:06,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:06,860 INFO L87 Difference]: Start difference. First operand 1897 states and 3250 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:06:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:07,484 INFO L93 Difference]: Finished difference Result 3799 states and 6513 transitions. [2023-11-19 08:06:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:07,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) Word has length 780 [2023-11-19 08:06:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:07,502 INFO L225 Difference]: With dead ends: 3799 [2023-11-19 08:06:07,502 INFO L226 Difference]: Without dead ends: 1905 [2023-11-19 08:06:07,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:07,510 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 608 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:07,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 1021 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:06:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2023-11-19 08:06:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1905. [2023-11-19 08:06:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1426 states have (on average 1.6339410939691446) internal successors, (2330), 1432 states have internal predecessors, (2330), 464 states have call successors, (464), 14 states have call predecessors, (464), 14 states have return successors, (464), 458 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-19 08:06:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3258 transitions. [2023-11-19 08:06:07,821 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3258 transitions. Word has length 780 [2023-11-19 08:06:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:07,823 INFO L495 AbstractCegarLoop]: Abstraction has 1905 states and 3258 transitions. [2023-11-19 08:06:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:06:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3258 transitions. [2023-11-19 08:06:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2023-11-19 08:06:07,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:07,834 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:07,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:08,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:08,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:08,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:08,065 INFO L85 PathProgramCache]: Analyzing trace with hash 771562070, now seen corresponding path program 1 times [2023-11-19 08:06:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:08,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125912347] [2023-11-19 08:06:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:08,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:08,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:08,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167308337] [2023-11-19 08:06:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:08,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:08,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:08,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:06:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:08,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:08,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 14863 proven. 174 refuted. 0 times theorem prover too weak. 14487 trivial. 0 not checked. [2023-11-19 08:06:09,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 189 proven. 174 refuted. 0 times theorem prover too weak. 29161 trivial. 0 not checked. [2023-11-19 08:06:10,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125912347] [2023-11-19 08:06:10,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167308337] [2023-11-19 08:06:10,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167308337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:10,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:10,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:06:10,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601735595] [2023-11-19 08:06:10,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:10,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:06:10,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:06:10,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:10,298 INFO L87 Difference]: Start difference. First operand 1905 states and 3258 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 2 states have call successors, (180), 2 states have call predecessors, (180), 4 states have return successors, (181), 2 states have call predecessors, (181), 2 states have call successors, (181) [2023-11-19 08:06:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:11,174 INFO L93 Difference]: Finished difference Result 3839 states and 6543 transitions. [2023-11-19 08:06:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:06:11,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 2 states have call successors, (180), 2 states have call predecessors, (180), 4 states have return successors, (181), 2 states have call predecessors, (181), 2 states have call successors, (181) Word has length 780 [2023-11-19 08:06:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:11,192 INFO L225 Difference]: With dead ends: 3839 [2023-11-19 08:06:11,192 INFO L226 Difference]: Without dead ends: 1937 [2023-11-19 08:06:11,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1562 GetRequests, 1552 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:06:11,200 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 620 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:11,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1277 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:06:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2023-11-19 08:06:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1913. [2023-11-19 08:06:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1432 states have (on average 1.6145251396648044) internal successors, (2312), 1438 states have internal predecessors, (2312), 464 states have call successors, (464), 16 states have call predecessors, (464), 16 states have return successors, (464), 458 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-19 08:06:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3240 transitions. [2023-11-19 08:06:11,509 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3240 transitions. Word has length 780 [2023-11-19 08:06:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:11,510 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3240 transitions. [2023-11-19 08:06:11,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 2 states have call successors, (180), 2 states have call predecessors, (180), 4 states have return successors, (181), 2 states have call predecessors, (181), 2 states have call successors, (181) [2023-11-19 08:06:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3240 transitions. [2023-11-19 08:06:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2023-11-19 08:06:11,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:11,522 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:11,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:11,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:11,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:11,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1789237722, now seen corresponding path program 1 times [2023-11-19 08:06:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:11,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172671157] [2023-11-19 08:06:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:11,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:11,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:11,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172194512] [2023-11-19 08:06:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:11,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:11,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:11,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:11,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:06:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:12,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:06:12,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29524 trivial. 0 not checked. [2023-11-19 08:06:13,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:13,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172671157] [2023-11-19 08:06:13,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:13,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172194512] [2023-11-19 08:06:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172194512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:13,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:13,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:13,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979704548] [2023-11-19 08:06:13,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:13,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:13,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:13,757 INFO L87 Difference]: Start difference. First operand 1913 states and 3240 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:06:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:14,555 INFO L93 Difference]: Finished difference Result 5853 states and 9890 transitions. [2023-11-19 08:06:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) Word has length 780 [2023-11-19 08:06:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:14,586 INFO L225 Difference]: With dead ends: 5853 [2023-11-19 08:06:14,586 INFO L226 Difference]: Without dead ends: 3943 [2023-11-19 08:06:14,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:14,595 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 545 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:14,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1648 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:06:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2023-11-19 08:06:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3940. [2023-11-19 08:06:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 2911 states have (on average 1.599106836138784) internal successors, (4655), 2924 states have internal predecessors, (4655), 990 states have call successors, (990), 38 states have call predecessors, (990), 38 states have return successors, (990), 977 states have call predecessors, (990), 990 states have call successors, (990) [2023-11-19 08:06:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 6635 transitions. [2023-11-19 08:06:15,282 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 6635 transitions. Word has length 780 [2023-11-19 08:06:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:15,284 INFO L495 AbstractCegarLoop]: Abstraction has 3940 states and 6635 transitions. [2023-11-19 08:06:15,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (122), 1 states have call predecessors, (122), 1 states have return successors, (122), 1 states have call predecessors, (122), 1 states have call successors, (122) [2023-11-19 08:06:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 6635 transitions. [2023-11-19 08:06:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2023-11-19 08:06:15,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:15,306 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:15,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:15,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:15,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1766605468, now seen corresponding path program 1 times [2023-11-19 08:06:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478226004] [2023-11-19 08:06:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:15,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:15,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969480590] [2023-11-19 08:06:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:15,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:15,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:15,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:15,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad29473-6e1d-496b-9164-6c9de322f3ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:06:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:16,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-19 08:06:16,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 29524 backedges. 54 proven. 309 refuted. 0 times theorem prover too weak. 29161 trivial. 0 not checked. [2023-11-19 08:06:20,491 INFO L327 TraceCheckSpWp]: Computing backward predicates...