./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5db290f428815e90a4f018b6e59020b3b572c51fa983142ee856b69fd7fa99fb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:56,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:56,430 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:47:56,438 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:56,439 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:56,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:56,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:56,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:56,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:56,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:56,477 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:56,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:56,478 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:56,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:56,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:47:56,481 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:56,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:56,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:56,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:56,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:47:56,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:56,485 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:47:56,486 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:56,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:47:56,487 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:56,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:56,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:56,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:56,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:56,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:56,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:56,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:47:56,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:56,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:56,495 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:56,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:47:56,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:56,497 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:56,497 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:56,498 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_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5db290f428815e90a4f018b6e59020b3b572c51fa983142ee856b69fd7fa99fb [2023-11-19 07:47:56,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:56,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:56,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:56,888 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:56,889 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:56,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i [2023-11-19 07:48:00,530 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:00,903 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:00,904 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i [2023-11-19 07:48:00,931 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/data/e47c22558/dc72c92c147649bbb8a483ec52fdc743/FLAG3d9e95ea1 [2023-11-19 07:48:00,947 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/data/e47c22558/dc72c92c147649bbb8a483ec52fdc743 [2023-11-19 07:48:00,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:00,957 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:00,959 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:00,959 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:00,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:00,965 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:00" (1/1) ... [2023-11-19 07:48:00,966 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5321e114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:00, skipping insertion in model container [2023-11-19 07:48:00,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:00" (1/1) ... [2023-11-19 07:48:01,020 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:01,214 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_6669da72-050b-494f-b759-ca3738b3cea5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i[916,929] [2023-11-19 07:48:01,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:01,455 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:01,470 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_6669da72-050b-494f-b759-ca3738b3cea5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i[916,929] [2023-11-19 07:48:01,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:01,607 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:01,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01 WrapperNode [2023-11-19 07:48:01,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:01,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:01,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:01,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:01,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,663 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,808 INFO L138 Inliner]: procedures = 26, calls = 106, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 891 [2023-11-19 07:48:01,808 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:01,809 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:01,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:01,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:01,821 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,846 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,894 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,914 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,964 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:01,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:01,965 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:01,965 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:01,966 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (1/1) ... [2023-11-19 07:48:01,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:01,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:02,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:02,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:02,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:02,049 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:48:02,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:48:02,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:02,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:02,250 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:02,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:03,705 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:03,726 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:03,727 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:48:03,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:03 BoogieIcfgContainer [2023-11-19 07:48:03,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:03,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:03,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:03,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:03,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:00" (1/3) ... [2023-11-19 07:48:03,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c356f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:03, skipping insertion in model container [2023-11-19 07:48:03,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:01" (2/3) ... [2023-11-19 07:48:03,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c356f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:03, skipping insertion in model container [2023-11-19 07:48:03,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:03" (3/3) ... [2023-11-19 07:48:03,743 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-36.i [2023-11-19 07:48:03,764 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:03,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:48:03,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:03,838 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@22b54397, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:03,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:48:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 329 states, 233 states have (on average 1.6824034334763949) internal successors, (392), 234 states have internal predecessors, (392), 93 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-19 07:48:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:03,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:03,891 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:03,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:03,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1734655746, now seen corresponding path program 1 times [2023-11-19 07:48:03,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:03,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061095135] [2023-11-19 07:48:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:03,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:04,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:04,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061095135] [2023-11-19 07:48:04,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:48:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790150652] [2023-11-19 07:48:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:04,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:04,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:04,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:48:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:05,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:48:05,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2023-11-19 07:48:05,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790150652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:05,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:05,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:05,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277022861] [2023-11-19 07:48:05,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:05,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:48:05,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:48:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:48:05,230 INFO L87 Difference]: Start difference. First operand has 329 states, 233 states have (on average 1.6824034334763949) internal successors, (392), 234 states have internal predecessors, (392), 93 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 2 states have call successors, (93) [2023-11-19 07:48:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:05,314 INFO L93 Difference]: Finished difference Result 649 states and 1239 transitions. [2023-11-19 07:48:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:48:05,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 2 states have call successors, (93) Word has length 608 [2023-11-19 07:48:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:05,333 INFO L225 Difference]: With dead ends: 649 [2023-11-19 07:48:05,333 INFO L226 Difference]: Without dead ends: 323 [2023-11-19 07:48:05,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:48:05,346 INFO L413 NwaCegarLoop]: 565 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, 565 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:05,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-19 07:48:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2023-11-19 07:48:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 228 states have (on average 1.662280701754386) internal successors, (379), 228 states have internal predecessors, (379), 93 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-19 07:48:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 565 transitions. [2023-11-19 07:48:05,472 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 565 transitions. Word has length 608 [2023-11-19 07:48:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:05,473 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 565 transitions. [2023-11-19 07:48:05,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 2 states have call successors, (93) [2023-11-19 07:48:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 565 transitions. [2023-11-19 07:48:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:05,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:05,497 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:05,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:05,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:48:05,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:05,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1887004500, now seen corresponding path program 1 times [2023-11-19 07:48:05,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:05,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781542630] [2023-11-19 07:48:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:05,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:05,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421092355] [2023-11-19 07:48:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:05,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:05,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:05,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:05,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:48:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:06,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:06,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:06,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:06,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781542630] [2023-11-19 07:48:06,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421092355] [2023-11-19 07:48:06,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421092355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:06,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:06,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631765076] [2023-11-19 07:48:06,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:06,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:06,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:06,515 INFO L87 Difference]: Start difference. First operand 323 states and 565 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:06,630 INFO L93 Difference]: Finished difference Result 857 states and 1512 transitions. [2023-11-19 07:48:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:06,641 INFO L225 Difference]: With dead ends: 857 [2023-11-19 07:48:06,641 INFO L226 Difference]: Without dead ends: 537 [2023-11-19 07:48:06,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:06,646 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 381 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:06,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1347 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:48:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-19 07:48:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 534. [2023-11-19 07:48:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 408 states have (on average 1.713235294117647) internal successors, (699), 409 states have internal predecessors, (699), 123 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-19 07:48:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 945 transitions. [2023-11-19 07:48:06,723 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 945 transitions. Word has length 608 [2023-11-19 07:48:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:06,726 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 945 transitions. [2023-11-19 07:48:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 945 transitions. [2023-11-19 07:48:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:06,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:06,735 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:06,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:06,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:06,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:06,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1646764754, now seen corresponding path program 1 times [2023-11-19 07:48:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:06,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123999194] [2023-11-19 07:48:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:07,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124824541] [2023-11-19 07:48:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:07,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:07,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:07,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:48:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:07,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:48:07,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:07,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123999194] [2023-11-19 07:48:07,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124824541] [2023-11-19 07:48:07,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124824541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:07,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:07,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:48:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072694733] [2023-11-19 07:48:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:07,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:07,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:07,838 INFO L87 Difference]: Start difference. First operand 534 states and 945 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:08,160 INFO L93 Difference]: Finished difference Result 1864 states and 3303 transitions. [2023-11-19 07:48:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:48:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:08,185 INFO L225 Difference]: With dead ends: 1864 [2023-11-19 07:48:08,185 INFO L226 Difference]: Without dead ends: 1333 [2023-11-19 07:48:08,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:08,191 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 736 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 2138 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:08,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 2138 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2023-11-19 07:48:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1326. [2023-11-19 07:48:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1064 states have (on average 1.736842105263158) internal successors, (1848), 1069 states have internal predecessors, (1848), 253 states have call successors, (253), 8 states have call predecessors, (253), 8 states have return successors, (253), 248 states have call predecessors, (253), 253 states have call successors, (253) [2023-11-19 07:48:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2354 transitions. [2023-11-19 07:48:08,339 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2354 transitions. Word has length 608 [2023-11-19 07:48:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:08,341 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 2354 transitions. [2023-11-19 07:48:08,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2354 transitions. [2023-11-19 07:48:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:08,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:08,351 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:08,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:08,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:08,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -692824596, now seen corresponding path program 1 times [2023-11-19 07:48:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084141253] [2023-11-19 07:48:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:08,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056482754] [2023-11-19 07:48:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:08,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:08,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:08,690 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:08,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:48:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:09,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:09,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:09,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:09,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:09,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084141253] [2023-11-19 07:48:09,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:09,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056482754] [2023-11-19 07:48:09,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056482754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:09,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:09,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:09,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965198467] [2023-11-19 07:48:09,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:09,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:09,262 INFO L87 Difference]: Start difference. First operand 1326 states and 2354 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:09,405 INFO L93 Difference]: Finished difference Result 3842 states and 6833 transitions. [2023-11-19 07:48:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:09,427 INFO L225 Difference]: With dead ends: 3842 [2023-11-19 07:48:09,427 INFO L226 Difference]: Without dead ends: 2519 [2023-11-19 07:48:09,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:09,433 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 389 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:09,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1112 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2023-11-19 07:48:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2515. [2023-11-19 07:48:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 2057 states have (on average 1.743801652892562) internal successors, (3587), 2068 states have internal predecessors, (3587), 441 states have call successors, (441), 16 states have call predecessors, (441), 16 states have return successors, (441), 430 states have call predecessors, (441), 441 states have call successors, (441) [2023-11-19 07:48:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 4469 transitions. [2023-11-19 07:48:09,628 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 4469 transitions. Word has length 608 [2023-11-19 07:48:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:09,632 INFO L495 AbstractCegarLoop]: Abstraction has 2515 states and 4469 transitions. [2023-11-19 07:48:09,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 4469 transitions. [2023-11-19 07:48:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:09,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:09,644 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:09,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:48:09,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:48:09,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:09,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1524805802, now seen corresponding path program 1 times [2023-11-19 07:48:09,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:09,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989470538] [2023-11-19 07:48:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:09,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:09,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335065357] [2023-11-19 07:48:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:09,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:09,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:09,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:09,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:48:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:10,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:10,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:10,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:10,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:10,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989470538] [2023-11-19 07:48:10,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:10,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335065357] [2023-11-19 07:48:10,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335065357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:10,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:10,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092850818] [2023-11-19 07:48:10,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:10,516 INFO L87 Difference]: Start difference. First operand 2515 states and 4469 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:10,743 INFO L93 Difference]: Finished difference Result 6883 states and 12150 transitions. [2023-11-19 07:48:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:10,777 INFO L225 Difference]: With dead ends: 6883 [2023-11-19 07:48:10,778 INFO L226 Difference]: Without dead ends: 4371 [2023-11-19 07:48:10,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:10,786 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 302 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:10,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1239 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2023-11-19 07:48:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4367. [2023-11-19 07:48:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4367 states, 3509 states have (on average 1.7118837275577088) internal successors, (6007), 3532 states have internal predecessors, (6007), 825 states have call successors, (825), 32 states have call predecessors, (825), 32 states have return successors, (825), 802 states have call predecessors, (825), 825 states have call successors, (825) [2023-11-19 07:48:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4367 states to 4367 states and 7657 transitions. [2023-11-19 07:48:11,183 INFO L78 Accepts]: Start accepts. Automaton has 4367 states and 7657 transitions. Word has length 608 [2023-11-19 07:48:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:11,184 INFO L495 AbstractCegarLoop]: Abstraction has 4367 states and 7657 transitions. [2023-11-19 07:48:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4367 states and 7657 transitions. [2023-11-19 07:48:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:11,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:11,199 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:11,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:11,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:11,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:11,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1231821464, now seen corresponding path program 1 times [2023-11-19 07:48:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:11,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050805483] [2023-11-19 07:48:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:11,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:11,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424664748] [2023-11-19 07:48:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:11,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:11,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:48:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:12,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:12,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:12,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:12,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050805483] [2023-11-19 07:48:12,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424664748] [2023-11-19 07:48:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424664748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:12,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:12,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672938706] [2023-11-19 07:48:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:12,211 INFO L87 Difference]: Start difference. First operand 4367 states and 7657 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:12,463 INFO L93 Difference]: Finished difference Result 8743 states and 15320 transitions. [2023-11-19 07:48:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:12,501 INFO L225 Difference]: With dead ends: 8743 [2023-11-19 07:48:12,502 INFO L226 Difference]: Without dead ends: 4379 [2023-11-19 07:48:12,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:12,517 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 260 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:12,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1230 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2023-11-19 07:48:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3387. [2023-11-19 07:48:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 2927 states have (on average 1.7673385719166381) internal successors, (5173), 2938 states have internal predecessors, (5173), 441 states have call successors, (441), 18 states have call predecessors, (441), 18 states have return successors, (441), 430 states have call predecessors, (441), 441 states have call successors, (441) [2023-11-19 07:48:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 6055 transitions. [2023-11-19 07:48:12,850 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 6055 transitions. Word has length 608 [2023-11-19 07:48:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:12,851 INFO L495 AbstractCegarLoop]: Abstraction has 3387 states and 6055 transitions. [2023-11-19 07:48:12,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 6055 transitions. [2023-11-19 07:48:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:12,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:12,867 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:12,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:13,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:48:13,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:13,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:13,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1474797930, now seen corresponding path program 1 times [2023-11-19 07:48:13,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:13,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774897988] [2023-11-19 07:48:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:13,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:13,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596117168] [2023-11-19 07:48:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:13,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:13,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:13,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:48:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:13,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:13,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:13,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:13,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774897988] [2023-11-19 07:48:13,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:13,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596117168] [2023-11-19 07:48:13,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596117168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:13,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:13,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:13,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373155859] [2023-11-19 07:48:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:13,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:13,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:13,825 INFO L87 Difference]: Start difference. First operand 3387 states and 6055 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:14,143 INFO L93 Difference]: Finished difference Result 10059 states and 17967 transitions. [2023-11-19 07:48:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:14,192 INFO L225 Difference]: With dead ends: 10059 [2023-11-19 07:48:14,192 INFO L226 Difference]: Without dead ends: 6675 [2023-11-19 07:48:14,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:14,204 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 540 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:14,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1114 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:14,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2023-11-19 07:48:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6673. [2023-11-19 07:48:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6673 states, 5754 states have (on average 1.7473062217587765) internal successors, (10054), 5776 states have internal predecessors, (10054), 882 states have call successors, (882), 36 states have call predecessors, (882), 36 states have return successors, (882), 860 states have call predecessors, (882), 882 states have call successors, (882) [2023-11-19 07:48:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6673 states to 6673 states and 11818 transitions. [2023-11-19 07:48:14,857 INFO L78 Accepts]: Start accepts. Automaton has 6673 states and 11818 transitions. Word has length 608 [2023-11-19 07:48:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:14,858 INFO L495 AbstractCegarLoop]: Abstraction has 6673 states and 11818 transitions. [2023-11-19 07:48:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 6673 states and 11818 transitions. [2023-11-19 07:48:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:14,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:14,881 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:14,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 07:48:15,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:15,107 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:15,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash -812100120, now seen corresponding path program 1 times [2023-11-19 07:48:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624184405] [2023-11-19 07:48:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:15,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:15,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239872713] [2023-11-19 07:48:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:15,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:15,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:48:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:15,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:15,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624184405] [2023-11-19 07:48:15,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239872713] [2023-11-19 07:48:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239872713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:15,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848947736] [2023-11-19 07:48:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:15,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:15,912 INFO L87 Difference]: Start difference. First operand 6673 states and 11818 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:16,455 INFO L93 Difference]: Finished difference Result 17421 states and 30520 transitions. [2023-11-19 07:48:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:16,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:16,523 INFO L225 Difference]: With dead ends: 17421 [2023-11-19 07:48:16,524 INFO L226 Difference]: Without dead ends: 10751 [2023-11-19 07:48:16,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:16,541 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 413 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:16,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1461 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2023-11-19 07:48:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 8017. [2023-11-19 07:48:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 7098 states have (on average 1.7444350521273597) internal successors, (12382), 7120 states have internal predecessors, (12382), 882 states have call successors, (882), 36 states have call predecessors, (882), 36 states have return successors, (882), 860 states have call predecessors, (882), 882 states have call successors, (882) [2023-11-19 07:48:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 14146 transitions. [2023-11-19 07:48:17,201 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 14146 transitions. Word has length 608 [2023-11-19 07:48:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:17,203 INFO L495 AbstractCegarLoop]: Abstraction has 8017 states and 14146 transitions. [2023-11-19 07:48:17,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 14146 transitions. [2023-11-19 07:48:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:17,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:17,223 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:17,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:17,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:17,446 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:17,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:17,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1629748570, now seen corresponding path program 1 times [2023-11-19 07:48:17,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:17,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774210015] [2023-11-19 07:48:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:17,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401887744] [2023-11-19 07:48:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:17,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:17,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:48:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:18,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:18,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774210015] [2023-11-19 07:48:18,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401887744] [2023-11-19 07:48:18,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401887744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:18,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:18,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573490267] [2023-11-19 07:48:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:18,130 INFO L87 Difference]: Start difference. First operand 8017 states and 14146 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:18,941 INFO L93 Difference]: Finished difference Result 24045 states and 42432 transitions. [2023-11-19 07:48:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:19,000 INFO L225 Difference]: With dead ends: 24045 [2023-11-19 07:48:19,001 INFO L226 Difference]: Without dead ends: 16031 [2023-11-19 07:48:19,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:19,025 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 551 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:19,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1128 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:19,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16031 states. [2023-11-19 07:48:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16031 to 16029. [2023-11-19 07:48:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16029 states, 14192 states have (on average 1.7412626832018039) internal successors, (24712), 14236 states have internal predecessors, (24712), 1764 states have call successors, (1764), 72 states have call predecessors, (1764), 72 states have return successors, (1764), 1720 states have call predecessors, (1764), 1764 states have call successors, (1764) [2023-11-19 07:48:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16029 states to 16029 states and 28240 transitions. [2023-11-19 07:48:19,993 INFO L78 Accepts]: Start accepts. Automaton has 16029 states and 28240 transitions. Word has length 608 [2023-11-19 07:48:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:19,995 INFO L495 AbstractCegarLoop]: Abstraction has 16029 states and 28240 transitions. [2023-11-19 07:48:19,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 16029 states and 28240 transitions. [2023-11-19 07:48:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:20,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:20,023 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:20,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:20,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:20,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 671074020, now seen corresponding path program 1 times [2023-11-19 07:48:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:20,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929366005] [2023-11-19 07:48:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:20,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:20,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:20,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323626435] [2023-11-19 07:48:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:20,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:20,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:20,336 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:20,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:48:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:20,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:48:20,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-19 07:48:21,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929366005] [2023-11-19 07:48:21,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:21,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323626435] [2023-11-19 07:48:21,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323626435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:21,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:21,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:21,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391813668] [2023-11-19 07:48:21,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:21,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:21,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:21,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:21,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:21,037 INFO L87 Difference]: Start difference. First operand 16029 states and 28240 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:22,054 INFO L93 Difference]: Finished difference Result 44397 states and 77686 transitions. [2023-11-19 07:48:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-19 07:48:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:22,144 INFO L225 Difference]: With dead ends: 44397 [2023-11-19 07:48:22,145 INFO L226 Difference]: Without dead ends: 28371 [2023-11-19 07:48:22,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:22,184 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 321 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:22,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1304 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28371 states. [2023-11-19 07:48:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28371 to 28365. [2023-11-19 07:48:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28365 states, 24764 states have (on average 1.7000484574382169) internal successors, (42100), 24856 states have internal predecessors, (42100), 3456 states have call successors, (3456), 144 states have call predecessors, (3456), 144 states have return successors, (3456), 3364 states have call predecessors, (3456), 3456 states have call successors, (3456) [2023-11-19 07:48:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28365 states to 28365 states and 49012 transitions. [2023-11-19 07:48:24,501 INFO L78 Accepts]: Start accepts. Automaton has 28365 states and 49012 transitions. Word has length 608 [2023-11-19 07:48:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:24,502 INFO L495 AbstractCegarLoop]: Abstraction has 28365 states and 49012 transitions. [2023-11-19 07:48:24,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-19 07:48:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 28365 states and 49012 transitions. [2023-11-19 07:48:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-19 07:48:24,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:24,541 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:24,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:24,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:48:24,762 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:24,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1692142374, now seen corresponding path program 1 times [2023-11-19 07:48:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:24,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185106972] [2023-11-19 07:48:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:24,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:24,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734707523] [2023-11-19 07:48:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:24,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:24,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:24,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:24,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6669da72-050b-494f-b759-ca3738b3cea5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:48:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:25,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:48:25,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 7778 proven. 93 refuted. 0 times theorem prover too weak. 9241 trivial. 0 not checked. [2023-11-19 07:48:26,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 183 proven. 93 refuted. 0 times theorem prover too weak. 16836 trivial. 0 not checked. [2023-11-19 07:48:26,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:26,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185106972] [2023-11-19 07:48:26,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:26,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734707523] [2023-11-19 07:48:26,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734707523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:26,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:26,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-19 07:48:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504133326] [2023-11-19 07:48:26,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:26,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:48:26,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:48:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:48:26,991 INFO L87 Difference]: Start difference. First operand 28365 states and 49012 transitions. Second operand has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 3 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 3 states have call predecessors, (125), 3 states have call successors, (125)