./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cb9b30dbc4292cb9b2a5d2ba3cd92c29fce78cf71613b08638f29c6cc332119 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:16:04,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:16:05,012 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:16:05,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:16:05,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:16:05,069 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:16:05,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:16:05,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:16:05,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:16:05,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:16:05,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:16:05,079 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:16:05,079 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:16:05,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:16:05,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:16:05,082 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:16:05,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:16:05,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:16:05,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:16:05,083 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:16:05,084 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:16:05,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:16:05,085 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:16:05,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:16:05,086 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:16:05,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:16:05,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:16:05,088 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:16:05,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:05,089 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:16:05,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:16:05,090 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:16:05,091 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:16:05,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:16:05,091 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:16:05,091 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:16:05,092 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:16:05,092 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:16:05,092 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:16:05,092 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_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cb9b30dbc4292cb9b2a5d2ba3cd92c29fce78cf71613b08638f29c6cc332119 [2023-11-06 22:16:05,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:16:05,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:16:05,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:16:05,425 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:16:05,426 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:16:05,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i [2023-11-06 22:16:08,502 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:16:08,802 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:16:08,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i [2023-11-06 22:16:08,817 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/data/128243bb6/4bf94333f2fb403daf68cf2c8df8d32d/FLAG9a089996b [2023-11-06 22:16:08,833 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/data/128243bb6/4bf94333f2fb403daf68cf2c8df8d32d [2023-11-06 22:16:08,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:16:08,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:16:08,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:08,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:16:08,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:16:08,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:08" (1/1) ... [2023-11-06 22:16:08,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f22784b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:08, skipping insertion in model container [2023-11-06 22:16:08,848 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:08" (1/1) ... [2023-11-06 22:16:08,907 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:16:09,069 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_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i[916,929] [2023-11-06 22:16:09,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:09,306 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:16:09,324 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_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i[916,929] [2023-11-06 22:16:09,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:09,432 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:16:09,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09 WrapperNode [2023-11-06 22:16:09,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:09,434 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:09,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:16:09,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:16:09,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,463 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,577 INFO L138 Inliner]: procedures = 26, calls = 58, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 398 [2023-11-06 22:16:09,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:09,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:16:09,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:16:09,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:16:09,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,653 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,659 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,673 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:16:09,674 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:16:09,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:16:09,674 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:16:09,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (1/1) ... [2023-11-06 22:16:09,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:09,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:16:09,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:16:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:16:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:16:09,794 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:16:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:16:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:16:09,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:16:09,938 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:16:09,941 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:16:10,889 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:16:10,902 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:16:10,902 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:16:10,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:10 BoogieIcfgContainer [2023-11-06 22:16:10,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:16:10,911 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:16:10,911 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:16:10,929 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:16:10,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:16:08" (1/3) ... [2023-11-06 22:16:10,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de4c1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:10, skipping insertion in model container [2023-11-06 22:16:10,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:09" (2/3) ... [2023-11-06 22:16:10,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de4c1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:10, skipping insertion in model container [2023-11-06 22:16:10,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:10" (3/3) ... [2023-11-06 22:16:10,934 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-53.i [2023-11-06 22:16:10,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:16:10,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:16:11,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:11,078 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34ced521, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:11,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:16:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 117 states have (on average 1.4957264957264957) internal successors, (175), 118 states have internal predecessors, (175), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-06 22:16:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-06 22:16:11,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:11,132 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:11,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:11,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1501342749, now seen corresponding path program 1 times [2023-11-06 22:16:11,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:11,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636128218] [2023-11-06 22:16:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:11,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:11,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:11,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636128218] [2023-11-06 22:16:11,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:16:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301507068] [2023-11-06 22:16:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:11,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:11,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:11,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:16:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:12,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:16:12,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2023-11-06 22:16:12,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301507068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:12,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:12,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:16:12,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246733643] [2023-11-06 22:16:12,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:12,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:16:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:16:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:16:12,141 INFO L87 Difference]: Start difference. First operand has 165 states, 117 states have (on average 1.4957264957264957) internal successors, (175), 118 states have internal predecessors, (175), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-06 22:16:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:12,256 INFO L93 Difference]: Finished difference Result 321 states and 565 transitions. [2023-11-06 22:16:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:16:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) Word has length 305 [2023-11-06 22:16:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:12,273 INFO L225 Difference]: With dead ends: 321 [2023-11-06 22:16:12,273 INFO L226 Difference]: Without dead ends: 159 [2023-11-06 22:16:12,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:16:12,287 INFO L413 NwaCegarLoop]: 253 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, 253 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:12,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:16:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-06 22:16:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-06 22:16:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 112 states have (on average 1.4553571428571428) internal successors, (163), 112 states have internal predecessors, (163), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-06 22:16:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 253 transitions. [2023-11-06 22:16:12,359 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 253 transitions. Word has length 305 [2023-11-06 22:16:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:12,363 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 253 transitions. [2023-11-06 22:16:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-06 22:16:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 253 transitions. [2023-11-06 22:16:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-06 22:16:12,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:12,373 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:12,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:16:12,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:12,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:12,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash -59060379, now seen corresponding path program 1 times [2023-11-06 22:16:12,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:12,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363639541] [2023-11-06 22:16:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:12,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:12,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:12,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143369833] [2023-11-06 22:16:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:12,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:12,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:12,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:16:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:13,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:16:13,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-06 22:16:13,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:13,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363639541] [2023-11-06 22:16:13,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:13,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143369833] [2023-11-06 22:16:13,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143369833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:13,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:13,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:13,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798450353] [2023-11-06 22:16:13,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:13,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:13,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:13,157 INFO L87 Difference]: Start difference. First operand 159 states and 253 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:13,251 INFO L93 Difference]: Finished difference Result 460 states and 733 transitions. [2023-11-06 22:16:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:13,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 305 [2023-11-06 22:16:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:13,257 INFO L225 Difference]: With dead ends: 460 [2023-11-06 22:16:13,257 INFO L226 Difference]: Without dead ends: 304 [2023-11-06 22:16:13,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:13,260 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 229 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:13,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 693 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:16:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-06 22:16:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 177. [2023-11-06 22:16:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 130 states have (on average 1.4692307692307693) internal successors, (191), 130 states have internal predecessors, (191), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-06 22:16:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 281 transitions. [2023-11-06 22:16:13,327 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 281 transitions. Word has length 305 [2023-11-06 22:16:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:13,330 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 281 transitions. [2023-11-06 22:16:13,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 281 transitions. [2023-11-06 22:16:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-06 22:16:13,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:13,337 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:13,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:13,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:16:13,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:13,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:13,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2110427547, now seen corresponding path program 1 times [2023-11-06 22:16:13,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:13,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808054817] [2023-11-06 22:16:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:13,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:13,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:13,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541389030] [2023-11-06 22:16:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:13,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:13,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:13,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:16:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:14,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:14,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1892 proven. 48 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2023-11-06 22:16:14,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 84 proven. 48 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:14,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808054817] [2023-11-06 22:16:14,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541389030] [2023-11-06 22:16:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541389030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:14,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:14,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:16:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976525286] [2023-11-06 22:16:14,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:14,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:16:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:16:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:16:14,565 INFO L87 Difference]: Start difference. First operand 177 states and 281 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:16:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:14,953 INFO L93 Difference]: Finished difference Result 357 states and 564 transitions. [2023-11-06 22:16:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:16:14,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 305 [2023-11-06 22:16:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:14,959 INFO L225 Difference]: With dead ends: 357 [2023-11-06 22:16:14,960 INFO L226 Difference]: Without dead ends: 183 [2023-11-06 22:16:14,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 602 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:16:14,964 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 177 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:14,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 513 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:16:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-06 22:16:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2023-11-06 22:16:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 133 states have (on average 1.4511278195488722) internal successors, (193), 133 states have internal predecessors, (193), 45 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-06 22:16:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 283 transitions. [2023-11-06 22:16:15,008 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 283 transitions. Word has length 305 [2023-11-06 22:16:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:15,010 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 283 transitions. [2023-11-06 22:16:15,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:16:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 283 transitions. [2023-11-06 22:16:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:16:15,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:15,016 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:15,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:15,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:15,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:15,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:15,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1305686533, now seen corresponding path program 1 times [2023-11-06 22:16:15,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:15,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150753268] [2023-11-06 22:16:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:15,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:15,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:15,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190571344] [2023-11-06 22:16:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:15,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:15,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:15,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:16:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:15,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:16:15,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-06 22:16:16,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150753268] [2023-11-06 22:16:16,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190571344] [2023-11-06 22:16:16,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190571344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:16,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:16,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:16:16,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953009452] [2023-11-06 22:16:16,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:16,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:16,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:16,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:16,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:16,055 INFO L87 Difference]: Start difference. First operand 181 states and 283 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:16,369 INFO L93 Difference]: Finished difference Result 599 states and 940 transitions. [2023-11-06 22:16:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:16:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 306 [2023-11-06 22:16:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:16,375 INFO L225 Difference]: With dead ends: 599 [2023-11-06 22:16:16,375 INFO L226 Difference]: Without dead ends: 421 [2023-11-06 22:16:16,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:16,377 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 382 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:16,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1060 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:16:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-06 22:16:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 357. [2023-11-06 22:16:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 262 states have (on average 1.4541984732824427) internal successors, (381), 262 states have internal predecessors, (381), 90 states have call successors, (90), 4 states have call predecessors, (90), 4 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-06 22:16:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 561 transitions. [2023-11-06 22:16:16,428 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 561 transitions. Word has length 306 [2023-11-06 22:16:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:16,429 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 561 transitions. [2023-11-06 22:16:16,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 561 transitions. [2023-11-06 22:16:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:16:16,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:16,435 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:16,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:16,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:16,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:16,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash 622586169, now seen corresponding path program 1 times [2023-11-06 22:16:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561708545] [2023-11-06 22:16:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:16,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:16,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701050564] [2023-11-06 22:16:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:16,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:16,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:16,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:16,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:16:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:17,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:16:17,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-06 22:16:18,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:18,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561708545] [2023-11-06 22:16:18,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:18,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701050564] [2023-11-06 22:16:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701050564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:18,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:18,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:16:18,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105330879] [2023-11-06 22:16:18,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:18,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:16:18,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:16:18,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:16:18,305 INFO L87 Difference]: Start difference. First operand 357 states and 561 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:20,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:16:22,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:16:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:22,973 INFO L93 Difference]: Finished difference Result 894 states and 1407 transitions. [2023-11-06 22:16:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:16:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 306 [2023-11-06 22:16:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:22,980 INFO L225 Difference]: With dead ends: 894 [2023-11-06 22:16:22,980 INFO L226 Difference]: Without dead ends: 716 [2023-11-06 22:16:22,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:16:22,983 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 405 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 91 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:22,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1008 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 248 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 22:16:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-06 22:16:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 473. [2023-11-06 22:16:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 331 states have (on average 1.4229607250755287) internal successors, (471), 331 states have internal predecessors, (471), 135 states have call successors, (135), 6 states have call predecessors, (135), 6 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 22:16:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 741 transitions. [2023-11-06 22:16:23,090 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 741 transitions. Word has length 306 [2023-11-06 22:16:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:23,091 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 741 transitions. [2023-11-06 22:16:23,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 741 transitions. [2023-11-06 22:16:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:16:23,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:23,099 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:23,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:16:23,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:23,306 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:23,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash 841440887, now seen corresponding path program 1 times [2023-11-06 22:16:23,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:23,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592283690] [2023-11-06 22:16:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:23,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307249997] [2023-11-06 22:16:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:23,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:23,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:23,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:16:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:23,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:16:23,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1836 proven. 132 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2023-11-06 22:16:24,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:25,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:25,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592283690] [2023-11-06 22:16:25,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:25,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307249997] [2023-11-06 22:16:25,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307249997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:25,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:25,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-06 22:16:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192010928] [2023-11-06 22:16:25,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:25,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:16:25,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:16:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:16:25,108 INFO L87 Difference]: Start difference. First operand 473 states and 741 transitions. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:16:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:25,844 INFO L93 Difference]: Finished difference Result 1174 states and 1821 transitions. [2023-11-06 22:16:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:16:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) Word has length 306 [2023-11-06 22:16:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:25,852 INFO L225 Difference]: With dead ends: 1174 [2023-11-06 22:16:25,852 INFO L226 Difference]: Without dead ends: 812 [2023-11-06 22:16:25,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 602 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:16:25,856 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 646 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:25,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 655 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:16:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-11-06 22:16:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 500. [2023-11-06 22:16:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 352 states have (on average 1.3977272727272727) internal successors, (492), 352 states have internal predecessors, (492), 135 states have call successors, (135), 12 states have call predecessors, (135), 12 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 22:16:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 762 transitions. [2023-11-06 22:16:25,948 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 762 transitions. Word has length 306 [2023-11-06 22:16:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:25,949 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 762 transitions. [2023-11-06 22:16:25,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:16:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 762 transitions. [2023-11-06 22:16:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:16:25,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:25,957 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:25,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:26,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:26,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:26,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2067323015, now seen corresponding path program 1 times [2023-11-06 22:16:26,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:26,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66105091] [2023-11-06 22:16:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:26,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:26,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523117200] [2023-11-06 22:16:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:26,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:26,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:26,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:16:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:26,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:26,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1518 proven. 99 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2023-11-06 22:16:27,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 33 proven. 99 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:27,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:27,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66105091] [2023-11-06 22:16:27,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:27,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523117200] [2023-11-06 22:16:27,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523117200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:27,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:27,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:16:27,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139541355] [2023-11-06 22:16:27,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:16:27,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:16:27,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:27,397 INFO L87 Difference]: Start difference. First operand 500 states and 762 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-06 22:16:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:27,873 INFO L93 Difference]: Finished difference Result 915 states and 1386 transitions. [2023-11-06 22:16:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:16:27,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) Word has length 306 [2023-11-06 22:16:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:27,879 INFO L225 Difference]: With dead ends: 915 [2023-11-06 22:16:27,879 INFO L226 Difference]: Without dead ends: 524 [2023-11-06 22:16:27,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:16:27,883 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 385 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:27,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 491 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:16:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-06 22:16:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 512. [2023-11-06 22:16:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 361 states have (on average 1.3795013850415512) internal successors, (498), 361 states have internal predecessors, (498), 135 states have call successors, (135), 15 states have call predecessors, (135), 15 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 22:16:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 768 transitions. [2023-11-06 22:16:27,974 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 768 transitions. Word has length 306 [2023-11-06 22:16:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:27,975 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 768 transitions. [2023-11-06 22:16:27,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-06 22:16:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 768 transitions. [2023-11-06 22:16:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:16:27,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:27,981 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:27,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:28,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:28,189 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:28,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1407791493, now seen corresponding path program 1 times [2023-11-06 22:16:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:28,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109431906] [2023-11-06 22:16:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:28,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:28,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716918662] [2023-11-06 22:16:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:28,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:28,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:28,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:28,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:16:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:28,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:16:28,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1934 proven. 51 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2023-11-06 22:16:28,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:29,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109431906] [2023-11-06 22:16:29,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:29,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716918662] [2023-11-06 22:16:29,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716918662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:29,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:29,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 22:16:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549834055] [2023-11-06 22:16:29,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:29,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:16:29,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:16:29,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:29,103 INFO L87 Difference]: Start difference. First operand 512 states and 768 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-06 22:16:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:29,993 INFO L93 Difference]: Finished difference Result 1349 states and 2005 transitions. [2023-11-06 22:16:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:16:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) Word has length 306 [2023-11-06 22:16:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:30,001 INFO L225 Difference]: With dead ends: 1349 [2023-11-06 22:16:30,001 INFO L226 Difference]: Without dead ends: 954 [2023-11-06 22:16:30,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 603 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:16:30,004 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 592 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:30,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 777 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:16:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-11-06 22:16:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 682. [2023-11-06 22:16:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 528 states have (on average 1.4109848484848484) internal successors, (745), 528 states have internal predecessors, (745), 135 states have call successors, (135), 18 states have call predecessors, (135), 18 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 22:16:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1015 transitions. [2023-11-06 22:16:30,097 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1015 transitions. Word has length 306 [2023-11-06 22:16:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:30,098 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 1015 transitions. [2023-11-06 22:16:30,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-06 22:16:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1015 transitions. [2023-11-06 22:16:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:16:30,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:30,105 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:30,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:30,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:16:30,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:30,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash -984144771, now seen corresponding path program 1 times [2023-11-06 22:16:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:30,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110724883] [2023-11-06 22:16:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:30,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:30,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859793041] [2023-11-06 22:16:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:30,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:30,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:16:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:16:30,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1994 proven. 57 refuted. 0 times theorem prover too weak. 1909 trivial. 0 not checked. [2023-11-06 22:16:30,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:31,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:31,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110724883] [2023-11-06 22:16:31,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:31,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859793041] [2023-11-06 22:16:31,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859793041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:31,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:31,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 22:16:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901600761] [2023-11-06 22:16:31,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:31,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:16:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:16:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:31,317 INFO L87 Difference]: Start difference. First operand 682 states and 1015 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-06 22:16:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:31,935 INFO L93 Difference]: Finished difference Result 1154 states and 1688 transitions. [2023-11-06 22:16:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:16:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 306 [2023-11-06 22:16:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:31,942 INFO L225 Difference]: With dead ends: 1154 [2023-11-06 22:16:31,942 INFO L226 Difference]: Without dead ends: 605 [2023-11-06 22:16:31,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 603 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:16:31,944 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 413 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:31,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 505 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:16:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-11-06 22:16:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 536. [2023-11-06 22:16:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 379 states have (on average 1.3139841688654355) internal successors, (498), 379 states have internal predecessors, (498), 135 states have call successors, (135), 21 states have call predecessors, (135), 21 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 22:16:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 768 transitions. [2023-11-06 22:16:32,047 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 768 transitions. Word has length 306 [2023-11-06 22:16:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:32,048 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 768 transitions. [2023-11-06 22:16:32,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-06 22:16:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 768 transitions. [2023-11-06 22:16:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:16:32,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:32,051 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:32,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:32,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:32,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:32,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:32,253 INFO L85 PathProgramCache]: Analyzing trace with hash 88473021, now seen corresponding path program 1 times [2023-11-06 22:16:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:32,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929019147] [2023-11-06 22:16:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:32,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:32,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:32,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778618051] [2023-11-06 22:16:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:32,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:32,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:32,304 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:32,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:16:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:32,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:16:32,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 722 proven. 246 refuted. 0 times theorem prover too weak. 2992 trivial. 0 not checked. [2023-11-06 22:16:33,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 12 proven. 249 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-06 22:16:34,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:34,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929019147] [2023-11-06 22:16:34,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:34,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778618051] [2023-11-06 22:16:34,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778618051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:34,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:34,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-06 22:16:34,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439379665] [2023-11-06 22:16:34,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:34,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:16:34,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:16:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:16:34,460 INFO L87 Difference]: Start difference. First operand 536 states and 768 transitions. Second operand has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-06 22:16:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:35,583 INFO L93 Difference]: Finished difference Result 980 states and 1388 transitions. [2023-11-06 22:16:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:16:35,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) Word has length 307 [2023-11-06 22:16:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:35,590 INFO L225 Difference]: With dead ends: 980 [2023-11-06 22:16:35,591 INFO L226 Difference]: Without dead ends: 578 [2023-11-06 22:16:35,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:16:35,593 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 519 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:35,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 850 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:16:35,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-06 22:16:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 548. [2023-11-06 22:16:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 388 states have (on average 1.2989690721649485) internal successors, (504), 388 states have internal predecessors, (504), 135 states have call successors, (135), 24 states have call predecessors, (135), 24 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 22:16:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 774 transitions. [2023-11-06 22:16:35,679 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 774 transitions. Word has length 307 [2023-11-06 22:16:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:35,680 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 774 transitions. [2023-11-06 22:16:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-06 22:16:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 774 transitions. [2023-11-06 22:16:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:16:35,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:35,684 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:35,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:35,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:16:35,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:35,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash -421000069, now seen corresponding path program 1 times [2023-11-06 22:16:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:35,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926507710] [2023-11-06 22:16:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:35,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:35,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:35,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545963920] [2023-11-06 22:16:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:35,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:35,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:35,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:16:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:36,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:16:36,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-06 22:16:36,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:36,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926507710] [2023-11-06 22:16:36,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545963920] [2023-11-06 22:16:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545963920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:36,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:36,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384834845] [2023-11-06 22:16:36,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:36,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:36,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:16:36,756 INFO L87 Difference]: Start difference. First operand 548 states and 774 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:37,023 INFO L93 Difference]: Finished difference Result 1117 states and 1595 transitions. [2023-11-06 22:16:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:16:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 307 [2023-11-06 22:16:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:37,029 INFO L225 Difference]: With dead ends: 1117 [2023-11-06 22:16:37,030 INFO L226 Difference]: Without dead ends: 689 [2023-11-06 22:16:37,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:37,032 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 158 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:37,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 703 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:16:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-06 22:16:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 548. [2023-11-06 22:16:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 388 states have (on average 1.2963917525773196) internal successors, (503), 388 states have internal predecessors, (503), 135 states have call successors, (135), 24 states have call predecessors, (135), 24 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 22:16:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 773 transitions. [2023-11-06 22:16:37,120 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 773 transitions. Word has length 307 [2023-11-06 22:16:37,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:37,121 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 773 transitions. [2023-11-06 22:16:37,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 773 transitions. [2023-11-06 22:16:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:16:37,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:37,124 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:37,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:37,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:16:37,337 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:37,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -172853575, now seen corresponding path program 1 times [2023-11-06 22:16:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:37,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365884023] [2023-11-06 22:16:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:37,425 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:37,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980375778] [2023-11-06 22:16:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:37,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:37,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:16:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:37,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:16:37,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-06 22:16:38,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:38,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:38,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365884023] [2023-11-06 22:16:38,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:38,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980375778] [2023-11-06 22:16:38,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980375778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:38,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:38,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:16:38,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729487239] [2023-11-06 22:16:38,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:38,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:16:38,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:38,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:16:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:38,290 INFO L87 Difference]: Start difference. First operand 548 states and 773 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:39,812 INFO L93 Difference]: Finished difference Result 3200 states and 4519 transitions. [2023-11-06 22:16:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:16:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 307 [2023-11-06 22:16:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:39,837 INFO L225 Difference]: With dead ends: 3200 [2023-11-06 22:16:39,837 INFO L226 Difference]: Without dead ends: 2795 [2023-11-06 22:16:39,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:16:39,841 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 1357 mSDsluCounter, 2713 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:39,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 3492 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:16:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2023-11-06 22:16:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1614. [2023-11-06 22:16:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1179 states have (on average 1.3044953350296862) internal successors, (1538), 1183 states have internal predecessors, (1538), 363 states have call successors, (363), 71 states have call predecessors, (363), 71 states have return successors, (363), 359 states have call predecessors, (363), 363 states have call successors, (363) [2023-11-06 22:16:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2264 transitions. [2023-11-06 22:16:40,146 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2264 transitions. Word has length 307 [2023-11-06 22:16:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:40,147 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2264 transitions. [2023-11-06 22:16:40,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2264 transitions. [2023-11-06 22:16:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:16:40,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:40,151 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:40,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:16:40,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:16:40,359 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:40,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -245240133, now seen corresponding path program 1 times [2023-11-06 22:16:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:40,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293070445] [2023-11-06 22:16:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:40,410 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:40,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40685994] [2023-11-06 22:16:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:40,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:40,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:40,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:16:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:40,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:16:40,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-06 22:16:41,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293070445] [2023-11-06 22:16:41,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40685994] [2023-11-06 22:16:41,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40685994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:41,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:16:41,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114785553] [2023-11-06 22:16:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:41,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:16:41,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:16:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:16:41,971 INFO L87 Difference]: Start difference. First operand 1614 states and 2264 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:43,953 INFO L93 Difference]: Finished difference Result 4919 states and 6884 transitions. [2023-11-06 22:16:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:16:43,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 307 [2023-11-06 22:16:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:43,982 INFO L225 Difference]: With dead ends: 4919 [2023-11-06 22:16:43,982 INFO L226 Difference]: Without dead ends: 3462 [2023-11-06 22:16:43,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:16:43,988 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 903 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:43,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 2893 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:16:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2023-11-06 22:16:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 1609. [2023-11-06 22:16:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1174 states have (on average 1.303236797274276) internal successors, (1530), 1178 states have internal predecessors, (1530), 363 states have call successors, (363), 71 states have call predecessors, (363), 71 states have return successors, (363), 359 states have call predecessors, (363), 363 states have call successors, (363) [2023-11-06 22:16:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2256 transitions. [2023-11-06 22:16:44,335 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2256 transitions. Word has length 307 [2023-11-06 22:16:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:44,336 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2256 transitions. [2023-11-06 22:16:44,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-06 22:16:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2256 transitions. [2023-11-06 22:16:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-11-06 22:16:44,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:44,339 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:44,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:16:44,547 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:44,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:44,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1478668735, now seen corresponding path program 1 times [2023-11-06 22:16:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:44,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605086951] [2023-11-06 22:16:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:44,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:44,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:44,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965853360] [2023-11-06 22:16:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:44,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:44,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:44,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:44,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:16:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:16:45,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1934 proven. 51 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2023-11-06 22:16:45,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:46,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:46,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605086951] [2023-11-06 22:16:46,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:46,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965853360] [2023-11-06 22:16:46,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965853360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:46,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:46,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-06 22:16:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605685091] [2023-11-06 22:16:46,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:16:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:16:46,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:16:46,194 INFO L87 Difference]: Start difference. First operand 1609 states and 2256 transitions. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:16:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:47,627 INFO L93 Difference]: Finished difference Result 4611 states and 6455 transitions. [2023-11-06 22:16:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:16:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 308 [2023-11-06 22:16:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:47,648 INFO L225 Difference]: With dead ends: 4611 [2023-11-06 22:16:47,649 INFO L226 Difference]: Without dead ends: 3125 [2023-11-06 22:16:47,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 603 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:16:47,654 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 756 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:47,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 1406 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:16:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2023-11-06 22:16:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 1147. [2023-11-06 22:16:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 876 states have (on average 1.3139269406392695) internal successors, (1151), 876 states have internal predecessors, (1151), 225 states have call successors, (225), 45 states have call predecessors, (225), 45 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-06 22:16:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1601 transitions. [2023-11-06 22:16:47,901 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1601 transitions. Word has length 308 [2023-11-06 22:16:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:47,902 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1601 transitions. [2023-11-06 22:16:47,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:16:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1601 transitions. [2023-11-06 22:16:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:16:47,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:47,905 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:47,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:48,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:16:48,113 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:48,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash -431185301, now seen corresponding path program 1 times [2023-11-06 22:16:48,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:48,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286755183] [2023-11-06 22:16:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:48,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:48,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:48,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362566230] [2023-11-06 22:16:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:48,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:48,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:48,230 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:48,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:16:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:48,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:16:48,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 384 proven. 126 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2023-11-06 22:16:49,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286755183] [2023-11-06 22:16:50,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:50,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362566230] [2023-11-06 22:16:50,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362566230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:50,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:50,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-06 22:16:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565998309] [2023-11-06 22:16:50,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:16:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:50,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:16:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:16:50,162 INFO L87 Difference]: Start difference. First operand 1147 states and 1601 transitions. Second operand has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:16:52,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:16:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:52,818 INFO L93 Difference]: Finished difference Result 2227 states and 3091 transitions. [2023-11-06 22:16:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:16:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 309 [2023-11-06 22:16:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:52,826 INFO L225 Difference]: With dead ends: 2227 [2023-11-06 22:16:52,826 INFO L226 Difference]: Without dead ends: 1201 [2023-11-06 22:16:52,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:16:52,830 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 209 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:52,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 428 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 294 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:16:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2023-11-06 22:16:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1151. [2023-11-06 22:16:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 875 states have (on average 1.2857142857142858) internal successors, (1125), 875 states have internal predecessors, (1125), 225 states have call successors, (225), 50 states have call predecessors, (225), 50 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-06 22:16:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1575 transitions. [2023-11-06 22:16:53,042 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1575 transitions. Word has length 309 [2023-11-06 22:16:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:53,043 INFO L495 AbstractCegarLoop]: Abstraction has 1151 states and 1575 transitions. [2023-11-06 22:16:53,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:16:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1575 transitions. [2023-11-06 22:16:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:16:53,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:53,046 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:53,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:16:53,255 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:53,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1519495057, now seen corresponding path program 1 times [2023-11-06 22:16:53,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:53,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746366962] [2023-11-06 22:16:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:53,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:53,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:53,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942685592] [2023-11-06 22:16:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:53,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:53,309 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:53,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:16:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:53,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:16:53,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1518 proven. 99 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2023-11-06 22:16:54,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 33 proven. 99 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:16:55,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746366962] [2023-11-06 22:16:55,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942685592] [2023-11-06 22:16:55,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942685592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:55,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:55,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:16:55,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826570494] [2023-11-06 22:16:55,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:55,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:16:55,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:16:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:16:55,128 INFO L87 Difference]: Start difference. First operand 1151 states and 1575 transitions. Second operand has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 states have internal predecessors, (146), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:16:58,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:00,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:02,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:03,275 INFO L93 Difference]: Finished difference Result 3921 states and 5390 transitions. [2023-11-06 22:17:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:17:03,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 states have internal predecessors, (146), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 310 [2023-11-06 22:17:03,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:03,293 INFO L225 Difference]: With dead ends: 3921 [2023-11-06 22:17:03,293 INFO L226 Difference]: Without dead ends: 2904 [2023-11-06 22:17:03,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:17:03,297 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 930 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 482 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:03,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1900 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1062 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2023-11-06 22:17:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2023-11-06 22:17:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2177. [2023-11-06 22:17:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 1677 states have (on average 1.2856290995825879) internal successors, (2156), 1677 states have internal predecessors, (2156), 405 states have call successors, (405), 94 states have call predecessors, (405), 94 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-06 22:17:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 2966 transitions. [2023-11-06 22:17:03,773 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 2966 transitions. Word has length 310 [2023-11-06 22:17:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:03,774 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 2966 transitions. [2023-11-06 22:17:03,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 states have internal predecessors, (146), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:17:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 2966 transitions. [2023-11-06 22:17:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:17:03,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:03,778 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:03,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:03,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:17:03,986 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:03,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash 147687759, now seen corresponding path program 1 times [2023-11-06 22:17:03,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:03,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908290233] [2023-11-06 22:17:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:03,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:04,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:04,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736939131] [2023-11-06 22:17:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:04,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:04,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:04,037 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:04,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:17:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:17:04,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1359 proven. 204 refuted. 0 times theorem prover too weak. 2397 trivial. 0 not checked. [2023-11-06 22:17:06,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 54 proven. 207 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-06 22:17:07,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908290233] [2023-11-06 22:17:07,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736939131] [2023-11-06 22:17:07,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736939131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:07,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:07,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2023-11-06 22:17:07,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368812031] [2023-11-06 22:17:07,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:07,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:17:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:17:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:17:07,043 INFO L87 Difference]: Start difference. First operand 2177 states and 2966 transitions. Second operand has 21 states, 20 states have (on average 8.75) internal successors, (175), 19 states have internal predecessors, (175), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-06 22:17:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:08,362 INFO L93 Difference]: Finished difference Result 4913 states and 6703 transitions. [2023-11-06 22:17:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:17:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 8.75) internal successors, (175), 19 states have internal predecessors, (175), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) Word has length 310 [2023-11-06 22:17:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:08,379 INFO L225 Difference]: With dead ends: 4913 [2023-11-06 22:17:08,380 INFO L226 Difference]: Without dead ends: 2875 [2023-11-06 22:17:08,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:17:08,386 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 260 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:08,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 838 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:17:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2023-11-06 22:17:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2297. [2023-11-06 22:17:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 1779 states have (on average 1.2692523889825744) internal successors, (2258), 1779 states have internal predecessors, (2258), 405 states have call successors, (405), 112 states have call predecessors, (405), 112 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-06 22:17:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3068 transitions. [2023-11-06 22:17:08,913 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3068 transitions. Word has length 310 [2023-11-06 22:17:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:08,914 INFO L495 AbstractCegarLoop]: Abstraction has 2297 states and 3068 transitions. [2023-11-06 22:17:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 8.75) internal successors, (175), 19 states have internal predecessors, (175), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-06 22:17:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3068 transitions. [2023-11-06 22:17:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:17:08,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:08,917 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:08,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:17:09,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:09,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash 570389585, now seen corresponding path program 1 times [2023-11-06 22:17:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744038709] [2023-11-06 22:17:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:09,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:09,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133948087] [2023-11-06 22:17:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:09,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:09,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:09,179 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:09,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:17:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:09,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:17:09,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1954 proven. 246 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2023-11-06 22:17:12,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 12 proven. 249 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-06 22:17:14,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:14,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744038709] [2023-11-06 22:17:14,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:14,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133948087] [2023-11-06 22:17:14,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133948087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:14,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:14,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-06 22:17:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223792987] [2023-11-06 22:17:14,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:17:14,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:17:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:17:14,693 INFO L87 Difference]: Start difference. First operand 2297 states and 3068 transitions. Second operand has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 8 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 8 states have call successors, (90) [2023-11-06 22:17:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:21,335 INFO L93 Difference]: Finished difference Result 9727 states and 12860 transitions. [2023-11-06 22:17:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-06 22:17:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 8 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 8 states have call successors, (90) Word has length 310 [2023-11-06 22:17:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:21,375 INFO L225 Difference]: With dead ends: 9727 [2023-11-06 22:17:21,375 INFO L226 Difference]: Without dead ends: 7577 [2023-11-06 22:17:21,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2109, Invalid=7203, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 22:17:21,385 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 2348 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2349 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:21,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2349 Valid, 1586 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 22:17:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7577 states. [2023-11-06 22:17:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7577 to 3861. [2023-11-06 22:17:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3206 states have (on average 1.3066126013724266) internal successors, (4189), 3222 states have internal predecessors, (4189), 485 states have call successors, (485), 169 states have call predecessors, (485), 169 states have return successors, (485), 469 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-06 22:17:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 5159 transitions. [2023-11-06 22:17:22,149 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 5159 transitions. Word has length 310 [2023-11-06 22:17:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:22,150 INFO L495 AbstractCegarLoop]: Abstraction has 3861 states and 5159 transitions. [2023-11-06 22:17:22,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 8 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 8 states have call successors, (90) [2023-11-06 22:17:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 5159 transitions. [2023-11-06 22:17:22,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:17:22,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:22,154 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:22,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:17:22,362 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:22,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:22,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1831940435, now seen corresponding path program 1 times [2023-11-06 22:17:22,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:22,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521156661] [2023-11-06 22:17:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:22,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:22,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:22,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952444221] [2023-11-06 22:17:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:22,411 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:22,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:17:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:22,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:17:23,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2093 proven. 318 refuted. 0 times theorem prover too weak. 1549 trivial. 0 not checked. [2023-11-06 22:17:25,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 60 proven. 327 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2023-11-06 22:17:26,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:26,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521156661] [2023-11-06 22:17:26,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:26,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952444221] [2023-11-06 22:17:26,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952444221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:26,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:26,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-06 22:17:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100257762] [2023-11-06 22:17:26,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:26,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:17:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:17:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:17:26,271 INFO L87 Difference]: Start difference. First operand 3861 states and 5159 transitions. Second operand has 24 states, 23 states have (on average 7.260869565217392) internal successors, (167), 24 states have internal predecessors, (167), 9 states have call successors, (89), 5 states have call predecessors, (89), 11 states have return successors, (90), 8 states have call predecessors, (90), 9 states have call successors, (90) [2023-11-06 22:17:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:28,195 INFO L93 Difference]: Finished difference Result 8529 states and 11403 transitions. [2023-11-06 22:17:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:17:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 7.260869565217392) internal successors, (167), 24 states have internal predecessors, (167), 9 states have call successors, (89), 5 states have call predecessors, (89), 11 states have return successors, (90), 8 states have call predecessors, (90), 9 states have call successors, (90) Word has length 310 [2023-11-06 22:17:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:28,209 INFO L225 Difference]: With dead ends: 8529 [2023-11-06 22:17:28,209 INFO L226 Difference]: Without dead ends: 4819 [2023-11-06 22:17:28,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=440, Invalid=1042, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:17:28,216 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1136 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:28,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1136 Valid, 604 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:17:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4819 states. [2023-11-06 22:17:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4819 to 2401. [2023-11-06 22:17:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 1865 states have (on average 1.2568364611260054) internal successors, (2344), 1865 states have internal predecessors, (2344), 405 states have call successors, (405), 130 states have call predecessors, (405), 130 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-06 22:17:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3154 transitions. [2023-11-06 22:17:28,816 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3154 transitions. Word has length 310 [2023-11-06 22:17:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:28,817 INFO L495 AbstractCegarLoop]: Abstraction has 2401 states and 3154 transitions. [2023-11-06 22:17:28,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 7.260869565217392) internal successors, (167), 24 states have internal predecessors, (167), 9 states have call successors, (89), 5 states have call predecessors, (89), 11 states have return successors, (90), 8 states have call predecessors, (90), 9 states have call successors, (90) [2023-11-06 22:17:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3154 transitions. [2023-11-06 22:17:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:17:28,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:28,821 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:28,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:29,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:29,034 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:29,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash 845149199, now seen corresponding path program 1 times [2023-11-06 22:17:29,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:29,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188667124] [2023-11-06 22:17:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:29,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:29,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852941901] [2023-11-06 22:17:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:29,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:29,102 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:29,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:17:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:29,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:17:29,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1982 proven. 75 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2023-11-06 22:17:33,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 57 proven. 75 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-06 22:17:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:34,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188667124] [2023-11-06 22:17:34,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:34,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852941901] [2023-11-06 22:17:34,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852941901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:34,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:34,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 22:17:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882795062] [2023-11-06 22:17:34,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:34,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:17:34,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:17:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:17:34,399 INFO L87 Difference]: Start difference. First operand 2401 states and 3154 transitions. Second operand has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:17:37,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:39,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:41,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:43,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:45,226 INFO L93 Difference]: Finished difference Result 7456 states and 9751 transitions. [2023-11-06 22:17:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:17:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 310 [2023-11-06 22:17:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:45,239 INFO L225 Difference]: With dead ends: 7456 [2023-11-06 22:17:45,240 INFO L226 Difference]: Without dead ends: 5210 [2023-11-06 22:17:45,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=954, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:17:45,247 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1033 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 128 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:45,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1018 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 836 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2023-11-06 22:17:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2023-11-06 22:17:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 3422. [2023-11-06 22:17:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 2877 states have (on average 1.302745915884602) internal successors, (3748), 2877 states have internal predecessors, (3748), 405 states have call successors, (405), 139 states have call predecessors, (405), 139 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-06 22:17:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4558 transitions. [2023-11-06 22:17:45,944 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4558 transitions. Word has length 310 [2023-11-06 22:17:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:45,945 INFO L495 AbstractCegarLoop]: Abstraction has 3422 states and 4558 transitions. [2023-11-06 22:17:45,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-06 22:17:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4558 transitions. [2023-11-06 22:17:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:17:45,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:45,949 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:45,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:46,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:46,158 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:46,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -743198703, now seen corresponding path program 1 times [2023-11-06 22:17:46,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:46,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372683095] [2023-11-06 22:17:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:46,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137111142] [2023-11-06 22:17:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:46,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:46,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:46,212 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:46,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7859350e-a7c5-4ac6-991e-394e5a7d0e6c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:17:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:55,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 22:17:55,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2095 proven. 852 refuted. 0 times theorem prover too weak. 1013 trivial. 0 not checked. [2023-11-06 22:18:10,417 INFO L327 TraceCheckSpWp]: Computing backward predicates...