./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8756b08be05a2754ba7f473b23db96aacdd088f16a43249dcd482c532b48d535 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:59:47,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:48,099 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:59:48,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:48,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:48,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:48,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:48,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:48,154 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:48,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:48,160 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:48,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:48,161 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:48,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:48,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:59:48,164 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:48,165 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:48,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:48,166 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:48,166 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:59:48,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:48,167 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:59:48,167 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:48,168 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:59:48,168 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:48,169 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:48,170 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:48,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:48,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:48,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:48,172 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:48,173 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:59:48,173 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:48,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:48,173 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:48,173 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:59:48,174 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:48,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:48,174 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:48,174 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_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8756b08be05a2754ba7f473b23db96aacdd088f16a43249dcd482c532b48d535 [2023-11-19 07:59:48,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:48,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:48,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:48,550 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:48,550 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:48,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-8.i [2023-11-19 07:59:51,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:52,007 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:52,008 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-8.i [2023-11-19 07:59:52,029 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/data/429078922/ae38683072a7446980de82f42efbca11/FLAGb92e82a85 [2023-11-19 07:59:52,050 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/data/429078922/ae38683072a7446980de82f42efbca11 [2023-11-19 07:59:52,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:52,059 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:52,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:52,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:52,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:52,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758fa97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52, skipping insertion in model container [2023-11-19 07:59:52,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,135 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:52,326 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_536536c7-8a40-4423-ba06-9730c89a8b16/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-8.i[915,928] [2023-11-19 07:59:52,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:52,522 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:52,552 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_536536c7-8a40-4423-ba06-9730c89a8b16/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-8.i[915,928] [2023-11-19 07:59:52,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:52,669 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:52,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52 WrapperNode [2023-11-19 07:59:52,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:52,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:52,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:52,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:52,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,824 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 384 [2023-11-19 07:59:52,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:52,828 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:52,828 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:52,828 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:52,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,863 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,900 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:52,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:52,964 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:52,964 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:52,965 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (1/1) ... [2023-11-19 07:59:52,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:53,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:53,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:59:53,047 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:59:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:53,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:53,200 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:53,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:54,009 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:54,020 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:54,021 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:59:54,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:54 BoogieIcfgContainer [2023-11-19 07:59:54,027 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:54,030 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:54,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:54,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:54,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:52" (1/3) ... [2023-11-19 07:59:54,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28960e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:54, skipping insertion in model container [2023-11-19 07:59:54,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:52" (2/3) ... [2023-11-19 07:59:54,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28960e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:54, skipping insertion in model container [2023-11-19 07:59:54,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:54" (3/3) ... [2023-11-19 07:59:54,037 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-8.i [2023-11-19 07:59:54,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:54,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:59:54,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:54,114 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55b3b684, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:54,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:59:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 117 states have (on average 1.5384615384615385) internal successors, (180), 118 states have internal predecessors, (180), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 07:59:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-11-19 07:59:54,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:54,146 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:54,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:54,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -651913964, now seen corresponding path program 1 times [2023-11-19 07:59:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230339567] [2023-11-19 07:59:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:54,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230339567] [2023-11-19 07:59:54,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:59:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236464585] [2023-11-19 07:59:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:54,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:54,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:54,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:54,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:59:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:54,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:59:54,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2023-11-19 07:59:55,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236464585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:55,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:55,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:55,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376977279] [2023-11-19 07:59:55,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:55,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:55,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:55,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:55,141 INFO L87 Difference]: Start difference. First operand has 170 states, 117 states have (on average 1.5384615384615385) internal successors, (180), 118 states have internal predecessors, (180), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-19 07:59:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:55,193 INFO L93 Difference]: Finished difference Result 333 states and 604 transitions. [2023-11-19 07:59:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:59:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) Word has length 327 [2023-11-19 07:59:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:55,206 INFO L225 Difference]: With dead ends: 333 [2023-11-19 07:59:55,206 INFO L226 Difference]: Without dead ends: 166 [2023-11-19 07:59:55,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:55,215 INFO L413 NwaCegarLoop]: 273 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, 273 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:55,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-19 07:59:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-19 07:59:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 114 states have internal predecessors, (173), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 07:59:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 273 transitions. [2023-11-19 07:59:55,289 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 273 transitions. Word has length 327 [2023-11-19 07:59:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:55,289 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 273 transitions. [2023-11-19 07:59:55,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-19 07:59:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 273 transitions. [2023-11-19 07:59:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-11-19 07:59:55,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:55,301 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:55,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:55,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:59:55,524 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:55,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash 169205196, now seen corresponding path program 1 times [2023-11-19 07:59:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:55,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043500187] [2023-11-19 07:59:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:55,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:55,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:55,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271024660] [2023-11-19 07:59:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:55,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:55,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:55,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:55,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:59:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:55,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:59:55,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 07:59:56,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:56,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:56,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043500187] [2023-11-19 07:59:56,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:56,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271024660] [2023-11-19 07:59:56,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271024660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:56,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:56,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:56,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660601849] [2023-11-19 07:59:56,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:56,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:56,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:56,099 INFO L87 Difference]: Start difference. First operand 166 states and 273 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:59:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:56,288 INFO L93 Difference]: Finished difference Result 479 states and 787 transitions. [2023-11-19 07:59:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 327 [2023-11-19 07:59:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:56,296 INFO L225 Difference]: With dead ends: 479 [2023-11-19 07:59:56,296 INFO L226 Difference]: Without dead ends: 316 [2023-11-19 07:59:56,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:56,300 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 240 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:56,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 654 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:59:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-19 07:59:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2023-11-19 07:59:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 211 states have (on average 1.4407582938388626) internal successors, (304), 211 states have internal predecessors, (304), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-19 07:59:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 504 transitions. [2023-11-19 07:59:56,362 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 504 transitions. Word has length 327 [2023-11-19 07:59:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:56,364 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 504 transitions. [2023-11-19 07:59:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:59:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 504 transitions. [2023-11-19 07:59:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-11-19 07:59:56,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:56,397 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:56,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:56,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:56,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:56,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1889154284, now seen corresponding path program 1 times [2023-11-19 07:59:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:56,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973661454] [2023-11-19 07:59:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:56,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:56,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:56,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027841796] [2023-11-19 07:59:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:56,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:56,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:56,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:59:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:56,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:59:56,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 07:59:57,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:57,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973661454] [2023-11-19 07:59:57,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027841796] [2023-11-19 07:59:57,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027841796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:57,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:57,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:57,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427933327] [2023-11-19 07:59:57,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:57,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:57,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:57,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:57,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:57,044 INFO L87 Difference]: Start difference. First operand 314 states and 504 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:59:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:57,210 INFO L93 Difference]: Finished difference Result 632 states and 1014 transitions. [2023-11-19 07:59:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 327 [2023-11-19 07:59:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:57,220 INFO L225 Difference]: With dead ends: 632 [2023-11-19 07:59:57,220 INFO L226 Difference]: Without dead ends: 321 [2023-11-19 07:59:57,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:57,226 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 216 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:57,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 480 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:59:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-19 07:59:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2023-11-19 07:59:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 216 states have (on average 1.3842592592592593) internal successors, (299), 216 states have internal predecessors, (299), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-19 07:59:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 499 transitions. [2023-11-19 07:59:57,302 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 499 transitions. Word has length 327 [2023-11-19 07:59:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:57,304 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 499 transitions. [2023-11-19 07:59:57,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:59:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 499 transitions. [2023-11-19 07:59:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-11-19 07:59:57,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:57,309 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:57,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:57,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:57,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:57,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 411668306, now seen corresponding path program 1 times [2023-11-19 07:59:57,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:57,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460551034] [2023-11-19 07:59:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:57,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:57,626 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:57,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377351848] [2023-11-19 07:59:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:57,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:57,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:57,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:57,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:59:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:57,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:57,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 07:59:59,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:59,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:59,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460551034] [2023-11-19 07:59:59,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:59,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377351848] [2023-11-19 07:59:59,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377351848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:59,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:59,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233625900] [2023-11-19 07:59:59,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:59,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:59:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:59,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:59:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:59,253 INFO L87 Difference]: Start difference. First operand 319 states and 499 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:59:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:59,712 INFO L93 Difference]: Finished difference Result 953 states and 1486 transitions. [2023-11-19 07:59:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:59:59,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 327 [2023-11-19 07:59:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:59,721 INFO L225 Difference]: With dead ends: 953 [2023-11-19 07:59:59,721 INFO L226 Difference]: Without dead ends: 637 [2023-11-19 07:59:59,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:59,729 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 406 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:59,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 569 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:59:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2023-11-19 07:59:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 474. [2023-11-19 07:59:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 320 states have (on average 1.378125) internal successors, (441), 320 states have internal predecessors, (441), 150 states have call successors, (150), 3 states have call predecessors, (150), 3 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-19 07:59:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 741 transitions. [2023-11-19 07:59:59,842 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 741 transitions. Word has length 327 [2023-11-19 07:59:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:59,846 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 741 transitions. [2023-11-19 07:59:59,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:59:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 741 transitions. [2023-11-19 07:59:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-11-19 07:59:59,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:59,850 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:59,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:00,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:00,073 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:00,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 552216916, now seen corresponding path program 1 times [2023-11-19 08:00:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:00,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608484056] [2023-11-19 08:00:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:00,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:00,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464506288] [2023-11-19 08:00:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:00,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:00,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:00,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:00,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:00:00,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2443 proven. 84 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2023-11-19 08:00:01,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 63 proven. 84 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-19 08:00:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608484056] [2023-11-19 08:00:02,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464506288] [2023-11-19 08:00:02,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464506288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:02,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:02,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-19 08:00:02,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973311756] [2023-11-19 08:00:02,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:02,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:00:02,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:00:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:00:02,014 INFO L87 Difference]: Start difference. First operand 474 states and 741 transitions. Second operand has 14 states, 14 states have (on average 10.285714285714286) internal successors, (144), 14 states have internal predecessors, (144), 4 states have call successors, (100), 3 states have call predecessors, (100), 5 states have return successors, (100), 4 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-19 08:00:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:06,001 INFO L93 Difference]: Finished difference Result 2692 states and 4133 transitions. [2023-11-19 08:00:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-19 08:00:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.285714285714286) internal successors, (144), 14 states have internal predecessors, (144), 4 states have call successors, (100), 3 states have call predecessors, (100), 5 states have return successors, (100), 4 states have call predecessors, (100), 4 states have call successors, (100) Word has length 327 [2023-11-19 08:00:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:06,024 INFO L225 Difference]: With dead ends: 2692 [2023-11-19 08:00:06,024 INFO L226 Difference]: Without dead ends: 2221 [2023-11-19 08:00:06,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1252, Unknown=0, NotChecked=0, Total=1722 [2023-11-19 08:00:06,029 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 1578 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 2861 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:06,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 2861 Invalid, 2887 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [438 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 08:00:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2023-11-19 08:00:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1424. [2023-11-19 08:00:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 970 states have (on average 1.3618556701030928) internal successors, (1321), 974 states have internal predecessors, (1321), 434 states have call successors, (434), 19 states have call predecessors, (434), 19 states have return successors, (434), 430 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-19 08:00:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2189 transitions. [2023-11-19 08:00:06,348 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2189 transitions. Word has length 327 [2023-11-19 08:00:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:06,349 INFO L495 AbstractCegarLoop]: Abstraction has 1424 states and 2189 transitions. [2023-11-19 08:00:06,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.285714285714286) internal successors, (144), 14 states have internal predecessors, (144), 4 states have call successors, (100), 3 states have call predecessors, (100), 5 states have return successors, (100), 4 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-19 08:00:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2189 transitions. [2023-11-19 08:00:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-19 08:00:06,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:06,357 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:06,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:06,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1267653955, now seen corresponding path program 1 times [2023-11-19 08:00:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184066271] [2023-11-19 08:00:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:06,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:06,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706584355] [2023-11-19 08:00:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:06,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:06,658 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:06,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:00:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:07,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:07,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1993 proven. 39 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2023-11-19 08:00:07,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 08:00:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184066271] [2023-11-19 08:00:07,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706584355] [2023-11-19 08:00:07,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706584355] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:07,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:07,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 08:00:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142577533] [2023-11-19 08:00:07,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:07,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:07,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:07,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:00:07,483 INFO L87 Difference]: Start difference. First operand 1424 states and 2189 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 08:00:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:07,855 INFO L93 Difference]: Finished difference Result 3457 states and 5324 transitions. [2023-11-19 08:00:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 329 [2023-11-19 08:00:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:07,876 INFO L225 Difference]: With dead ends: 3457 [2023-11-19 08:00:07,876 INFO L226 Difference]: Without dead ends: 2036 [2023-11-19 08:00:07,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:00:07,885 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 245 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:07,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 518 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2023-11-19 08:00:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1609. [2023-11-19 08:00:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1155 states have (on average 1.3948051948051947) internal successors, (1611), 1159 states have internal predecessors, (1611), 434 states have call successors, (434), 19 states have call predecessors, (434), 19 states have return successors, (434), 430 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-19 08:00:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2479 transitions. [2023-11-19 08:00:08,190 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2479 transitions. Word has length 329 [2023-11-19 08:00:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:08,191 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2479 transitions. [2023-11-19 08:00:08,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 08:00:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2479 transitions. [2023-11-19 08:00:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-19 08:00:08,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:08,196 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:08,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:00:08,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:08,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash 327969803, now seen corresponding path program 1 times [2023-11-19 08:00:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:08,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759705585] [2023-11-19 08:00:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:08,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:08,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162995980] [2023-11-19 08:00:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:08,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:08,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:08,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:08,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:00:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:08,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 08:00:08,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 3228 proven. 129 refuted. 0 times theorem prover too weak. 1543 trivial. 0 not checked. [2023-11-19 08:00:13,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:21,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759705585] [2023-11-19 08:00:21,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162995980] [2023-11-19 08:00:21,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162995980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:21,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:21,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-19 08:00:21,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563468750] [2023-11-19 08:00:21,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:21,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 08:00:21,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 08:00:21,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2023-11-19 08:00:21,427 INFO L87 Difference]: Start difference. First operand 1609 states and 2479 transitions. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 14 states have internal predecessors, (101), 5 states have call successors, (50), 5 states have call predecessors, (50), 7 states have return successors, (50), 5 states have call predecessors, (50), 5 states have call successors, (50) [2023-11-19 08:00:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:24,996 INFO L93 Difference]: Finished difference Result 3891 states and 5894 transitions. [2023-11-19 08:00:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 08:00:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 14 states have internal predecessors, (101), 5 states have call successors, (50), 5 states have call predecessors, (50), 7 states have return successors, (50), 5 states have call predecessors, (50), 5 states have call successors, (50) Word has length 330 [2023-11-19 08:00:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:25,015 INFO L225 Difference]: With dead ends: 3891 [2023-11-19 08:00:25,015 INFO L226 Difference]: Without dead ends: 2285 [2023-11-19 08:00:25,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=670, Invalid=1400, Unknown=0, NotChecked=0, Total=2070 [2023-11-19 08:00:25,022 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1336 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:25,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 1661 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 08:00:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2023-11-19 08:00:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2252. [2023-11-19 08:00:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 1588 states have (on average 1.3482367758186398) internal successors, (2141), 1597 states have internal predecessors, (2141), 621 states have call successors, (621), 42 states have call predecessors, (621), 42 states have return successors, (621), 612 states have call predecessors, (621), 621 states have call successors, (621) [2023-11-19 08:00:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 3383 transitions. [2023-11-19 08:00:25,382 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 3383 transitions. Word has length 330 [2023-11-19 08:00:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:25,384 INFO L495 AbstractCegarLoop]: Abstraction has 2252 states and 3383 transitions. [2023-11-19 08:00:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 14 states have internal predecessors, (101), 5 states have call successors, (50), 5 states have call predecessors, (50), 7 states have return successors, (50), 5 states have call predecessors, (50), 5 states have call successors, (50) [2023-11-19 08:00:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 3383 transitions. [2023-11-19 08:00:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-19 08:00:25,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:25,410 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:25,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:25,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:00:25,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:25,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1975637346, now seen corresponding path program 1 times [2023-11-19 08:00:25,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:25,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524089172] [2023-11-19 08:00:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:25,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720295418] [2023-11-19 08:00:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:25,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:25,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:25,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:00:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:26,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:26,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 08:00:26,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:26,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:26,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524089172] [2023-11-19 08:00:26,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:26,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720295418] [2023-11-19 08:00:26,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720295418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:26,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:26,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:26,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369020225] [2023-11-19 08:00:26,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:26,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:26,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:26,116 INFO L87 Difference]: Start difference. First operand 2252 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 08:00:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:26,674 INFO L93 Difference]: Finished difference Result 3697 states and 5618 transitions. [2023-11-19 08:00:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 331 [2023-11-19 08:00:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:26,692 INFO L225 Difference]: With dead ends: 3697 [2023-11-19 08:00:26,692 INFO L226 Difference]: Without dead ends: 2254 [2023-11-19 08:00:26,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:26,698 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 262 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:26,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 781 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:00:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2023-11-19 08:00:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2252. [2023-11-19 08:00:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 1588 states have (on average 1.3419395465994963) internal successors, (2131), 1597 states have internal predecessors, (2131), 621 states have call successors, (621), 42 states have call predecessors, (621), 42 states have return successors, (621), 612 states have call predecessors, (621), 621 states have call successors, (621) [2023-11-19 08:00:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 3373 transitions. [2023-11-19 08:00:27,087 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 3373 transitions. Word has length 331 [2023-11-19 08:00:27,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:27,088 INFO L495 AbstractCegarLoop]: Abstraction has 2252 states and 3373 transitions. [2023-11-19 08:00:27,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 08:00:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 3373 transitions. [2023-11-19 08:00:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-19 08:00:27,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:27,093 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:27,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:27,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:00:27,316 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:27,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1325214572, now seen corresponding path program 1 times [2023-11-19 08:00:27,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:27,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465200164] [2023-11-19 08:00:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:27,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:27,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:27,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554167934] [2023-11-19 08:00:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:27,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:27,370 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:27,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:00:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:27,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:27,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2747 proven. 126 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2023-11-19 08:00:28,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-19 08:00:28,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:28,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465200164] [2023-11-19 08:00:28,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:28,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554167934] [2023-11-19 08:00:28,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554167934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:28,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 08:00:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960947969] [2023-11-19 08:00:28,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:28,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:00:28,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:00:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:00:28,707 INFO L87 Difference]: Start difference. First operand 2252 states and 3373 transitions. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 5 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-19 08:00:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:29,428 INFO L93 Difference]: Finished difference Result 4030 states and 5969 transitions. [2023-11-19 08:00:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:00:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 5 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) Word has length 331 [2023-11-19 08:00:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:29,458 INFO L225 Difference]: With dead ends: 4030 [2023-11-19 08:00:29,458 INFO L226 Difference]: Without dead ends: 2424 [2023-11-19 08:00:29,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-11-19 08:00:29,466 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 384 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:29,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 476 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:00:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2023-11-19 08:00:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2252. [2023-11-19 08:00:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 1618 states have (on average 1.3244746600741657) internal successors, (2143), 1627 states have internal predecessors, (2143), 565 states have call successors, (565), 68 states have call predecessors, (565), 68 states have return successors, (565), 556 states have call predecessors, (565), 565 states have call successors, (565) [2023-11-19 08:00:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 3273 transitions. [2023-11-19 08:00:29,801 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 3273 transitions. Word has length 331 [2023-11-19 08:00:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:29,802 INFO L495 AbstractCegarLoop]: Abstraction has 2252 states and 3273 transitions. [2023-11-19 08:00:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 5 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-19 08:00:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 3273 transitions. [2023-11-19 08:00:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-19 08:00:29,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:29,807 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:29,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:30,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:30,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:30,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash 908524642, now seen corresponding path program 1 times [2023-11-19 08:00:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418200995] [2023-11-19 08:00:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:30,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:30,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:30,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128652345] [2023-11-19 08:00:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:30,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:30,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:30,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:30,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_536536c7-8a40-4423-ba06-9730c89a8b16/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:00:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:30,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-19 08:00:30,533 INFO L285 TraceCheckSpWp]: Computing forward predicates...