./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-10_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-10_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b9308720d07799738d2bf3272bc150196623be74b0092d021bdb1b9cd368313 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:56:56,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:56:56,290 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:56:56,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:56:56,302 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:56:56,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:56:56,345 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:56:56,346 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:56:56,347 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:56:56,347 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:56:56,348 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:56:56,349 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:56:56,350 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:56:56,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:56:56,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:56:56,352 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:56:56,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:56:56,353 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:56:56,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:56:56,354 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:56:56,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:56:56,355 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:56:56,356 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:56:56,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:56:56,357 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:56:56,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:56:56,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:56:56,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:56:56,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:56:56,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:56:56,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:56:56,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:56:56,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:56:56,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:56:56,362 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:56:56,363 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:56:56,363 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:56:56,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:56:56,365 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:56:56,365 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_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b9308720d07799738d2bf3272bc150196623be74b0092d021bdb1b9cd368313 [2023-11-06 21:56:56,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:56:56,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:56:56,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:56:56,834 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:56:56,835 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:56:56,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-10_file-81.i [2023-11-06 21:57:00,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:00,949 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:00,950 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-10_file-81.i [2023-11-06 21:57:00,962 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/data/5a208bf3e/484c7b704ccf46b39031b1adbcf7ba04/FLAG362b064f2 [2023-11-06 21:57:00,992 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/data/5a208bf3e/484c7b704ccf46b39031b1adbcf7ba04 [2023-11-06 21:57:00,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:00,996 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:00,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:00,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:01,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:01,006 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:00" (1/1) ... [2023-11-06 21:57:01,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279b6e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01, skipping insertion in model container [2023-11-06 21:57:01,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:00" (1/1) ... [2023-11-06 21:57:01,057 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:01,274 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_16b71c46-3cfa-4cfc-91fd-1774631687fc/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-10_file-81.i[915,928] [2023-11-06 21:57:01,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:01,378 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:01,391 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_16b71c46-3cfa-4cfc-91fd-1774631687fc/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-10_file-81.i[915,928] [2023-11-06 21:57:01,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:01,480 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:01,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01 WrapperNode [2023-11-06 21:57:01,481 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:01,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:01,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:01,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:01,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,585 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 220 [2023-11-06 21:57:01,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:01,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:01,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:01,592 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:01,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,688 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:01,701 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:01,702 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:01,702 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:01,703 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (1/1) ... [2023-11-06 21:57:01,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:01,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:01,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:01,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:01,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:01,821 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:57:01,822 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:57:01,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:57:01,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:01,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:01,989 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:01,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:02,655 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:02,665 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:02,665 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:57:02,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:02 BoogieIcfgContainer [2023-11-06 21:57:02,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:02,679 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:02,679 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:02,683 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:02,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:00" (1/3) ... [2023-11-06 21:57:02,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4e2ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:02, skipping insertion in model container [2023-11-06 21:57:02,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:01" (2/3) ... [2023-11-06 21:57:02,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4e2ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:02, skipping insertion in model container [2023-11-06 21:57:02,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:02" (3/3) ... [2023-11-06 21:57:02,690 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-10_file-81.i [2023-11-06 21:57:02,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:02,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:57:02,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:57:02,792 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b27931, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:57:02,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:57:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 53 states have internal predecessors, (71), 33 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-06 21:57:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-06 21:57:02,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:02,827 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:02,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:02,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 189694641, now seen corresponding path program 1 times [2023-11-06 21:57:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:02,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166869699] [2023-11-06 21:57:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:02,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:03,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:03,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166869699] [2023-11-06 21:57:03,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:57:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394209482] [2023-11-06 21:57:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:03,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:03,181 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:03,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:57:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:03,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:57:03,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2023-11-06 21:57:03,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:03,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394209482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:03,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:03,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:03,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784473643] [2023-11-06 21:57:03,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:03,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:57:03,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:57:03,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:57:03,748 INFO L87 Difference]: Start difference. First operand has 88 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 53 states have internal predecessors, (71), 33 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-06 21:57:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:03,811 INFO L93 Difference]: Finished difference Result 169 states and 301 transitions. [2023-11-06 21:57:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:57:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 2 states have call successors, (33) Word has length 204 [2023-11-06 21:57:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:03,824 INFO L225 Difference]: With dead ends: 169 [2023-11-06 21:57:03,824 INFO L226 Difference]: Without dead ends: 84 [2023-11-06 21:57:03,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:57:03,834 INFO L413 NwaCegarLoop]: 130 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, 130 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:03,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-06 21:57:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-06 21:57:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 33 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-06 21:57:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2023-11-06 21:57:03,903 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 204 [2023-11-06 21:57:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:03,904 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2023-11-06 21:57:03,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-06 21:57:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2023-11-06 21:57:03,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-06 21:57:03,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:03,912 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:03,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:04,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:57:04,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:04,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:04,119 INFO L85 PathProgramCache]: Analyzing trace with hash -201445965, now seen corresponding path program 1 times [2023-11-06 21:57:04,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:04,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241701847] [2023-11-06 21:57:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:04,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:04,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:04,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191742398] [2023-11-06 21:57:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:04,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:04,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:04,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:57:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:04,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:57:04,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 876 proven. 159 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2023-11-06 21:57:05,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 27 proven. 162 refuted. 0 times theorem prover too weak. 1923 trivial. 0 not checked. [2023-11-06 21:57:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241701847] [2023-11-06 21:57:06,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:06,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191742398] [2023-11-06 21:57:06,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191742398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:06,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:06,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 21:57:06,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193015579] [2023-11-06 21:57:06,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:06,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:57:06,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:57:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:57:06,572 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 5 states have call successors, (65), 3 states have call predecessors, (65), 7 states have return successors, (66), 4 states have call predecessors, (66), 5 states have call successors, (66) [2023-11-06 21:57:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:07,954 INFO L93 Difference]: Finished difference Result 264 states and 385 transitions. [2023-11-06 21:57:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:57:07,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 5 states have call successors, (65), 3 states have call predecessors, (65), 7 states have return successors, (66), 4 states have call predecessors, (66), 5 states have call successors, (66) Word has length 204 [2023-11-06 21:57:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:07,962 INFO L225 Difference]: With dead ends: 264 [2023-11-06 21:57:07,962 INFO L226 Difference]: Without dead ends: 183 [2023-11-06 21:57:07,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:57:07,967 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 372 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:07,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 323 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:57:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-06 21:57:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 133. [2023-11-06 21:57:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 84 states have (on average 1.25) internal successors, (105), 85 states have internal predecessors, (105), 43 states have call successors, (43), 5 states have call predecessors, (43), 5 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-06 21:57:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions. [2023-11-06 21:57:08,043 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 204 [2023-11-06 21:57:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:08,045 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 191 transitions. [2023-11-06 21:57:08,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 5 states have call successors, (65), 3 states have call predecessors, (65), 7 states have return successors, (66), 4 states have call predecessors, (66), 5 states have call successors, (66) [2023-11-06 21:57:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions. [2023-11-06 21:57:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-06 21:57:08,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:08,052 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:08,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 21:57:08,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:08,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:08,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 462690489, now seen corresponding path program 1 times [2023-11-06 21:57:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257419708] [2023-11-06 21:57:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:08,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650510836] [2023-11-06 21:57:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:08,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:08,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:08,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:08,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:57:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:08,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:57:08,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 816 proven. 72 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2023-11-06 21:57:09,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2023-11-06 21:57:09,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257419708] [2023-11-06 21:57:09,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:09,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650510836] [2023-11-06 21:57:09,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650510836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:09,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:09,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-06 21:57:09,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297553440] [2023-11-06 21:57:09,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:09,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:57:09,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:57:09,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:57:09,680 INFO L87 Difference]: Start difference. First operand 133 states and 191 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 3 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2023-11-06 21:57:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:13,116 INFO L93 Difference]: Finished difference Result 667 states and 915 transitions. [2023-11-06 21:57:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 21:57:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 3 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) Word has length 205 [2023-11-06 21:57:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:13,128 INFO L225 Difference]: With dead ends: 667 [2023-11-06 21:57:13,128 INFO L226 Difference]: Without dead ends: 537 [2023-11-06 21:57:13,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=950, Invalid=3472, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 21:57:13,135 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 899 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:13,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 708 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 21:57:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-06 21:57:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 351. [2023-11-06 21:57:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 235 states have (on average 1.1914893617021276) internal successors, (280), 241 states have internal predecessors, (280), 91 states have call successors, (91), 24 states have call predecessors, (91), 24 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-06 21:57:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 462 transitions. [2023-11-06 21:57:13,285 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 462 transitions. Word has length 205 [2023-11-06 21:57:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:13,290 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 462 transitions. [2023-11-06 21:57:13,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 3 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2023-11-06 21:57:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 462 transitions. [2023-11-06 21:57:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:13,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:13,298 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:13,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:13,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:13,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:13,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 905504240, now seen corresponding path program 1 times [2023-11-06 21:57:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:13,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344835626] [2023-11-06 21:57:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:13,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:13,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554006251] [2023-11-06 21:57:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:13,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:13,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:13,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:13,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:57:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:13,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:57:13,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:57:13,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:13,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344835626] [2023-11-06 21:57:13,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554006251] [2023-11-06 21:57:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554006251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:13,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:13,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:13,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48023344] [2023-11-06 21:57:13,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:13,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:13,879 INFO L87 Difference]: Start difference. First operand 351 states and 462 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:14,008 INFO L93 Difference]: Finished difference Result 837 states and 1088 transitions. [2023-11-06 21:57:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 206 [2023-11-06 21:57:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:14,015 INFO L225 Difference]: With dead ends: 837 [2023-11-06 21:57:14,016 INFO L226 Difference]: Without dead ends: 527 [2023-11-06 21:57:14,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:14,019 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 29 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:14,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 256 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-11-06 21:57:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 519. [2023-11-06 21:57:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 367 states have (on average 1.1716621253405994) internal successors, (430), 379 states have internal predecessors, (430), 115 states have call successors, (115), 36 states have call predecessors, (115), 36 states have return successors, (115), 103 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-06 21:57:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 660 transitions. [2023-11-06 21:57:14,115 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 660 transitions. Word has length 206 [2023-11-06 21:57:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:14,116 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 660 transitions. [2023-11-06 21:57:14,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 660 transitions. [2023-11-06 21:57:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:14,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:14,121 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:14,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:14,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:14,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1614455694, now seen corresponding path program 1 times [2023-11-06 21:57:14,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:14,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998867187] [2023-11-06 21:57:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:14,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:14,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:14,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690749233] [2023-11-06 21:57:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:14,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:14,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:14,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:14,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:57:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:14,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:57:14,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 32 proven. 96 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-11-06 21:57:15,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2023-11-06 21:57:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998867187] [2023-11-06 21:57:16,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690749233] [2023-11-06 21:57:16,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690749233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:16,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:16,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 21:57:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977525365] [2023-11-06 21:57:16,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:16,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:16,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:16,306 INFO L87 Difference]: Start difference. First operand 519 states and 660 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-06 21:57:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:18,740 INFO L93 Difference]: Finished difference Result 1503 states and 1913 transitions. [2023-11-06 21:57:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:57:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) Word has length 206 [2023-11-06 21:57:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:18,750 INFO L225 Difference]: With dead ends: 1503 [2023-11-06 21:57:18,751 INFO L226 Difference]: Without dead ends: 1025 [2023-11-06 21:57:18,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 21:57:18,755 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1140 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:18,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 663 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:57:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2023-11-06 21:57:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 715. [2023-11-06 21:57:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 501 states have (on average 1.1756487025948104) internal successors, (589), 516 states have internal predecessors, (589), 166 states have call successors, (166), 47 states have call predecessors, (166), 47 states have return successors, (166), 151 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-06 21:57:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 921 transitions. [2023-11-06 21:57:18,945 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 921 transitions. Word has length 206 [2023-11-06 21:57:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:18,946 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 921 transitions. [2023-11-06 21:57:18,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-06 21:57:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 921 transitions. [2023-11-06 21:57:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:18,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:18,951 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:18,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:19,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:19,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:19,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:19,166 INFO L85 PathProgramCache]: Analyzing trace with hash -603338444, now seen corresponding path program 1 times [2023-11-06 21:57:19,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:19,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249684224] [2023-11-06 21:57:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:19,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:19,214 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:19,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934053735] [2023-11-06 21:57:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:19,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:19,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:19,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:57:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:19,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:57:19,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 32 proven. 96 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-11-06 21:57:20,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2023-11-06 21:57:21,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249684224] [2023-11-06 21:57:21,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:21,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934053735] [2023-11-06 21:57:21,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934053735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:21,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:21,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 21:57:21,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217112508] [2023-11-06 21:57:21,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:21,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:57:21,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:57:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:57:21,215 INFO L87 Difference]: Start difference. First operand 715 states and 921 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-06 21:57:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:23,863 INFO L93 Difference]: Finished difference Result 1319 states and 1723 transitions. [2023-11-06 21:57:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:57:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) Word has length 206 [2023-11-06 21:57:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:23,877 INFO L225 Difference]: With dead ends: 1319 [2023-11-06 21:57:23,878 INFO L226 Difference]: Without dead ends: 837 [2023-11-06 21:57:23,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:57:23,882 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 612 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:23,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 511 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:57:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2023-11-06 21:57:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 359. [2023-11-06 21:57:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 236 states have (on average 1.1440677966101696) internal successors, (270), 241 states have internal predecessors, (270), 99 states have call successors, (99), 23 states have call predecessors, (99), 23 states have return successors, (99), 94 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 21:57:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 468 transitions. [2023-11-06 21:57:24,021 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 468 transitions. Word has length 206 [2023-11-06 21:57:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:24,022 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 468 transitions. [2023-11-06 21:57:24,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-06 21:57:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 468 transitions. [2023-11-06 21:57:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:24,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:24,027 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:24,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:24,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:57:24,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:24,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1659443248, now seen corresponding path program 1 times [2023-11-06 21:57:24,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:24,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240005777] [2023-11-06 21:57:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:24,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:24,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:24,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10198955] [2023-11-06 21:57:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:24,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:24,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:24,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:24,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:57:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:24,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:57:24,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-06 21:57:26,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 1923 trivial. 0 not checked. [2023-11-06 21:57:27,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:27,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240005777] [2023-11-06 21:57:27,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:27,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10198955] [2023-11-06 21:57:27,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10198955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:27,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:27,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-06 21:57:27,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816716260] [2023-11-06 21:57:27,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:57:27,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:57:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:57:27,884 INFO L87 Difference]: Start difference. First operand 359 states and 468 transitions. Second operand has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 6 states have call successors, (66), 4 states have call predecessors, (66), 6 states have return successors, (66), 4 states have call predecessors, (66), 6 states have call successors, (66) [2023-11-06 21:57:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:30,532 INFO L93 Difference]: Finished difference Result 757 states and 966 transitions. [2023-11-06 21:57:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:57:30,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 6 states have call successors, (66), 4 states have call predecessors, (66), 6 states have return successors, (66), 4 states have call predecessors, (66), 6 states have call successors, (66) Word has length 206 [2023-11-06 21:57:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:30,547 INFO L225 Difference]: With dead ends: 757 [2023-11-06 21:57:30,547 INFO L226 Difference]: Without dead ends: 484 [2023-11-06 21:57:30,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=591, Invalid=1479, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 21:57:30,553 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 624 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:30,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 747 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:57:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-11-06 21:57:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 366. [2023-11-06 21:57:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 247 states have internal predecessors, (275), 99 states have call successors, (99), 24 states have call predecessors, (99), 24 states have return successors, (99), 94 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 21:57:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 473 transitions. [2023-11-06 21:57:30,694 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 473 transitions. Word has length 206 [2023-11-06 21:57:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:30,695 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 473 transitions. [2023-11-06 21:57:30,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 6 states have call successors, (66), 4 states have call predecessors, (66), 6 states have return successors, (66), 4 states have call predecessors, (66), 6 states have call successors, (66) [2023-11-06 21:57:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 473 transitions. [2023-11-06 21:57:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:30,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:30,699 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:30,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:30,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:30,909 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:30,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:30,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1624406798, now seen corresponding path program 1 times [2023-11-06 21:57:30,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:30,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759109702] [2023-11-06 21:57:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:30,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:30,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:30,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20125594] [2023-11-06 21:57:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:30,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:30,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:30,968 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:31,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:57:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:31,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:57:31,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 72 proven. 270 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-06 21:57:43,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:57:52,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:52,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759109702] [2023-11-06 21:57:52,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:52,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20125594] [2023-11-06 21:57:52,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20125594] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:52,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:57:52,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 23 [2023-11-06 21:57:52,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489351732] [2023-11-06 21:57:52,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:52,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:57:52,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:57:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:57:52,997 INFO L87 Difference]: Start difference. First operand 366 states and 473 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:55,237 INFO L93 Difference]: Finished difference Result 730 states and 929 transitions. [2023-11-06 21:57:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:57:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 206 [2023-11-06 21:57:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:55,242 INFO L225 Difference]: With dead ends: 730 [2023-11-06 21:57:55,242 INFO L226 Difference]: Without dead ends: 494 [2023-11-06 21:57:55,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:57:55,244 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 104 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:55,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 470 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:57:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-11-06 21:57:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 390. [2023-11-06 21:57:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 266 states have (on average 1.1428571428571428) internal successors, (304), 271 states have internal predecessors, (304), 99 states have call successors, (99), 24 states have call predecessors, (99), 24 states have return successors, (99), 94 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 21:57:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 502 transitions. [2023-11-06 21:57:55,432 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 502 transitions. Word has length 206 [2023-11-06 21:57:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 502 transitions. [2023-11-06 21:57:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 502 transitions. [2023-11-06 21:57:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:55,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:55,435 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:55,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:55,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:55,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1153718574, now seen corresponding path program 1 times [2023-11-06 21:57:55,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:55,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580376577] [2023-11-06 21:57:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:55,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:55,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115089] [2023-11-06 21:57:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:55,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:55,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:55,677 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:55,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:57:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:55,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:57:55,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:57:55,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:55,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580376577] [2023-11-06 21:57:55,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:55,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115089] [2023-11-06 21:57:55,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:55,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:55,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:57:55,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17915762] [2023-11-06 21:57:55,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:55,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:55,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:55,871 INFO L87 Difference]: Start difference. First operand 390 states and 502 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:56,157 INFO L93 Difference]: Finished difference Result 675 states and 867 transitions. [2023-11-06 21:57:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:57:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 206 [2023-11-06 21:57:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:56,162 INFO L225 Difference]: With dead ends: 675 [2023-11-06 21:57:56,162 INFO L226 Difference]: Without dead ends: 397 [2023-11-06 21:57:56,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:56,166 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 68 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:56,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 353 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:57:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-06 21:57:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 392. [2023-11-06 21:57:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 268 states have (on average 1.1380597014925373) internal successors, (305), 273 states have internal predecessors, (305), 99 states have call successors, (99), 24 states have call predecessors, (99), 24 states have return successors, (99), 94 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 21:57:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 503 transitions. [2023-11-06 21:57:56,325 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 503 transitions. Word has length 206 [2023-11-06 21:57:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:56,327 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 503 transitions. [2023-11-06 21:57:56,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 503 transitions. [2023-11-06 21:57:56,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:56,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:56,331 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:56,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:56,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:56,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:56,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1314337931, now seen corresponding path program 1 times [2023-11-06 21:57:56,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:56,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724646434] [2023-11-06 21:57:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:56,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:56,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194968916] [2023-11-06 21:57:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:56,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:56,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:56,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:57:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:56,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:57:56,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:57:56,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:56,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:56,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724646434] [2023-11-06 21:57:56,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194968916] [2023-11-06 21:57:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194968916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:56,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:56,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:57:56,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655577311] [2023-11-06 21:57:56,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:56,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:56,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:56,785 INFO L87 Difference]: Start difference. First operand 392 states and 503 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:57,045 INFO L93 Difference]: Finished difference Result 640 states and 813 transitions. [2023-11-06 21:57:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:57:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 206 [2023-11-06 21:57:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:57,050 INFO L225 Difference]: With dead ends: 640 [2023-11-06 21:57:57,050 INFO L226 Difference]: Without dead ends: 385 [2023-11-06 21:57:57,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:57,052 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 55 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:57,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 336 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:57:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-06 21:57:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 333. [2023-11-06 21:57:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 223 states have (on average 1.1121076233183858) internal successors, (248), 225 states have internal predecessors, (248), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:57:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 422 transitions. [2023-11-06 21:57:57,183 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 422 transitions. Word has length 206 [2023-11-06 21:57:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:57,184 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 422 transitions. [2023-11-06 21:57:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:57:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 422 transitions. [2023-11-06 21:57:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:57:57,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:57,187 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:57,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:57:57,394 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:57,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1906686581, now seen corresponding path program 1 times [2023-11-06 21:57:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634873649] [2023-11-06 21:57:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:57,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:57,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246585787] [2023-11-06 21:57:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:57,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:57,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:57,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:57,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:57:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:57,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 21:57:57,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 822 proven. 246 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-06 21:58:01,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:58:09,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:09,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634873649] [2023-11-06 21:58:09,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:09,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246585787] [2023-11-06 21:58:09,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246585787] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:09,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:09,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 21:58:09,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255940639] [2023-11-06 21:58:09,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:09,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:09,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:09,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:58:09,448 INFO L87 Difference]: Start difference. First operand 333 states and 422 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:58:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:11,576 INFO L93 Difference]: Finished difference Result 540 states and 686 transitions. [2023-11-06 21:58:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:58:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 206 [2023-11-06 21:58:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:11,584 INFO L225 Difference]: With dead ends: 540 [2023-11-06 21:58:11,584 INFO L226 Difference]: Without dead ends: 375 [2023-11-06 21:58:11,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:58:11,586 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 200 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:11,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 521 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:58:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-06 21:58:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 341. [2023-11-06 21:58:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 231 states have (on average 1.1168831168831168) internal successors, (258), 233 states have internal predecessors, (258), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:58:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 432 transitions. [2023-11-06 21:58:11,734 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 432 transitions. Word has length 206 [2023-11-06 21:58:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:11,734 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 432 transitions. [2023-11-06 21:58:11,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:58:11,735 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 432 transitions. [2023-11-06 21:58:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-06 21:58:11,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:11,739 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:11,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:11,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:11,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:11,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:11,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2130115277, now seen corresponding path program 1 times [2023-11-06 21:58:11,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:11,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954157019] [2023-11-06 21:58:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:11,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:12,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:12,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497673720] [2023-11-06 21:58:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:12,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:12,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:12,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:12,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:58:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:12,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 21:58:12,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 822 proven. 246 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-06 21:58:15,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:58:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954157019] [2023-11-06 21:58:23,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497673720] [2023-11-06 21:58:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497673720] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:23,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:23,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 21:58:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775506228] [2023-11-06 21:58:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:23,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:58:23,648 INFO L87 Difference]: Start difference. First operand 341 states and 432 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:58:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:25,789 INFO L93 Difference]: Finished difference Result 548 states and 695 transitions. [2023-11-06 21:58:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:58:25,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 206 [2023-11-06 21:58:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:25,794 INFO L225 Difference]: With dead ends: 548 [2023-11-06 21:58:25,794 INFO L226 Difference]: Without dead ends: 375 [2023-11-06 21:58:25,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:58:25,796 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 165 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:25,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 588 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:58:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-06 21:58:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 341. [2023-11-06 21:58:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 231 states have (on average 1.1168831168831168) internal successors, (258), 233 states have internal predecessors, (258), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:58:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 432 transitions. [2023-11-06 21:58:25,921 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 432 transitions. Word has length 206 [2023-11-06 21:58:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:25,921 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 432 transitions. [2023-11-06 21:58:25,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:58:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 432 transitions. [2023-11-06 21:58:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-06 21:58:25,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:25,923 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:25,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:26,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:58:26,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:26,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1027386541, now seen corresponding path program 1 times [2023-11-06 21:58:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:26,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987535986] [2023-11-06 21:58:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:26,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:26,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:26,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800262384] [2023-11-06 21:58:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:26,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:26,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:58:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:58:26,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-06 21:58:42,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:58:50,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987535986] [2023-11-06 21:58:50,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800262384] [2023-11-06 21:58:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800262384] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:50,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:50,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-06 21:58:50,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754408238] [2023-11-06 21:58:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:50,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:58:50,450 INFO L87 Difference]: Start difference. First operand 341 states and 432 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:58:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:51,675 INFO L93 Difference]: Finished difference Result 647 states and 808 transitions. [2023-11-06 21:58:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:58:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 207 [2023-11-06 21:58:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:51,680 INFO L225 Difference]: With dead ends: 647 [2023-11-06 21:58:51,680 INFO L226 Difference]: Without dead ends: 432 [2023-11-06 21:58:51,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:58:51,683 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 129 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:51,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 557 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:58:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-11-06 21:58:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2023-11-06 21:58:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 234 states have (on average 1.1282051282051282) internal successors, (264), 236 states have internal predecessors, (264), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:58:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 438 transitions. [2023-11-06 21:58:51,857 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 438 transitions. Word has length 207 [2023-11-06 21:58:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:51,858 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 438 transitions. [2023-11-06 21:58:51,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:58:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 438 transitions. [2023-11-06 21:58:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-06 21:58:51,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:51,861 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:51,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:52,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:58:52,069 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:52,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:52,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1750738831, now seen corresponding path program 1 times [2023-11-06 21:58:52,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:52,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284327130] [2023-11-06 21:58:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:52,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:52,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220108967] [2023-11-06 21:58:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:52,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:52,108 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:52,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:58:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:58:52,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 32 proven. 96 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-11-06 21:58:53,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2023-11-06 21:58:53,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284327130] [2023-11-06 21:58:53,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220108967] [2023-11-06 21:58:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220108967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:53,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:53,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-06 21:58:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13827569] [2023-11-06 21:58:53,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:53,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:58:53,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:58:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:58:53,518 INFO L87 Difference]: Start difference. First operand 344 states and 438 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-06 21:58:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:55,141 INFO L93 Difference]: Finished difference Result 664 states and 828 transitions. [2023-11-06 21:58:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:58:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) Word has length 207 [2023-11-06 21:58:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:55,148 INFO L225 Difference]: With dead ends: 664 [2023-11-06 21:58:55,148 INFO L226 Difference]: Without dead ends: 437 [2023-11-06 21:58:55,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:58:55,151 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 475 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:55,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 408 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:58:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-06 21:58:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 338. [2023-11-06 21:58:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 228 states have (on average 1.1228070175438596) internal successors, (256), 230 states have internal predecessors, (256), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:58:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 430 transitions. [2023-11-06 21:58:55,308 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 430 transitions. Word has length 207 [2023-11-06 21:58:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:55,309 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 430 transitions. [2023-11-06 21:58:55,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 4 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (66), 2 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-06 21:58:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 430 transitions. [2023-11-06 21:58:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-06 21:58:55,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:55,311 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:55,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 21:58:55,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:58:55,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:55,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1614192555, now seen corresponding path program 1 times [2023-11-06 21:58:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063051042] [2023-11-06 21:58:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:55,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:55,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535595367] [2023-11-06 21:58:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:55,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:55,556 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:55,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:58:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:55,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:58:55,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-06 21:59:10,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:59:18,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063051042] [2023-11-06 21:59:18,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535595367] [2023-11-06 21:59:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535595367] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:18,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:59:18,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 21:59:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631513345] [2023-11-06 21:59:18,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:18,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:59:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:18,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:59:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:59:18,961 INFO L87 Difference]: Start difference. First operand 338 states and 430 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:59:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:20,030 INFO L93 Difference]: Finished difference Result 619 states and 776 transitions. [2023-11-06 21:59:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:59:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 207 [2023-11-06 21:59:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:20,034 INFO L225 Difference]: With dead ends: 619 [2023-11-06 21:59:20,035 INFO L226 Difference]: Without dead ends: 402 [2023-11-06 21:59:20,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:59:20,037 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 115 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:20,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 499 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:59:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-06 21:59:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 326. [2023-11-06 21:59:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 216 states have (on average 1.1203703703703705) internal successors, (242), 218 states have internal predecessors, (242), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:59:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 416 transitions. [2023-11-06 21:59:20,191 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 416 transitions. Word has length 207 [2023-11-06 21:59:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:20,191 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 416 transitions. [2023-11-06 21:59:20,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:59:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 416 transitions. [2023-11-06 21:59:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-06 21:59:20,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:20,194 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:20,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:20,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:20,400 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:20,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash 162390929, now seen corresponding path program 1 times [2023-11-06 21:59:20,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:20,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438710969] [2023-11-06 21:59:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:20,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:20,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:20,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901353134] [2023-11-06 21:59:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:20,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:20,431 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:20,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:59:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:20,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:59:20,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-06 21:59:31,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:59:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438710969] [2023-11-06 21:59:37,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901353134] [2023-11-06 21:59:37,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901353134] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:37,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:59:37,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 21:59:37,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859850752] [2023-11-06 21:59:37,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:37,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:59:37,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:37,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:59:37,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:59:37,554 INFO L87 Difference]: Start difference. First operand 326 states and 416 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:59:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:39,093 INFO L93 Difference]: Finished difference Result 569 states and 720 transitions. [2023-11-06 21:59:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:59:39,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 207 [2023-11-06 21:59:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:39,097 INFO L225 Difference]: With dead ends: 569 [2023-11-06 21:59:39,097 INFO L226 Difference]: Without dead ends: 394 [2023-11-06 21:59:39,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:59:39,099 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 168 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:39,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 579 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:59:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-06 21:59:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 332. [2023-11-06 21:59:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 222 states have (on average 1.1216216216216217) internal successors, (249), 224 states have internal predecessors, (249), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:59:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 423 transitions. [2023-11-06 21:59:39,209 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 423 transitions. Word has length 207 [2023-11-06 21:59:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:39,210 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 423 transitions. [2023-11-06 21:59:39,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:59:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 423 transitions. [2023-11-06 21:59:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-06 21:59:39,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:39,212 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:39,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:39,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:59:39,419 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:39,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash -424415085, now seen corresponding path program 1 times [2023-11-06 21:59:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:39,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436751966] [2023-11-06 21:59:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:39,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:39,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856539262] [2023-11-06 21:59:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:39,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:39,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:39,454 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:39,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:59:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:39,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:59:39,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-06 21:59:50,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2023-11-06 21:59:56,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:56,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436751966] [2023-11-06 21:59:56,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:56,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856539262] [2023-11-06 21:59:56,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856539262] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:56,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:59:56,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 21:59:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305792996] [2023-11-06 21:59:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:56,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:59:56,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:59:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:59:56,389 INFO L87 Difference]: Start difference. First operand 332 states and 423 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:59:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:57,793 INFO L93 Difference]: Finished difference Result 575 states and 726 transitions. [2023-11-06 21:59:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:59:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 207 [2023-11-06 21:59:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:57,797 INFO L225 Difference]: With dead ends: 575 [2023-11-06 21:59:57,798 INFO L226 Difference]: Without dead ends: 394 [2023-11-06 21:59:57,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:59:57,800 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 191 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:57,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 495 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:59:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-06 21:59:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 329. [2023-11-06 21:59:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 219 states have (on average 1.1187214611872147) internal successors, (245), 221 states have internal predecessors, (245), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-06 21:59:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 419 transitions. [2023-11-06 21:59:57,906 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 419 transitions. Word has length 207 [2023-11-06 21:59:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:57,907 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 419 transitions. [2023-11-06 21:59:57,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-06 21:59:57,907 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 419 transitions. [2023-11-06 21:59:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-06 21:59:57,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:57,908 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:57,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:58,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:59:58,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:58,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1543249520, now seen corresponding path program 1 times [2023-11-06 21:59:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:58,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586550155] [2023-11-06 21:59:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:58,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:58,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089887672] [2023-11-06 21:59:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:58,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:58,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:58,141 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:58,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b71c46-3cfa-4cfc-91fd-1774631687fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:59:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:58,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:59:58,336 INFO L285 TraceCheckSpWp]: Computing forward predicates...