./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.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_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/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_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/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_6090d8f0-95d6-4abf-a612-433f90bc4f77/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 10f0c9018ad5a3307ca17a327503d3e78d6b57daa0dbd1bfcb592e3c4d78b33a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:03,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:03,577 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:44:03,584 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:03,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:03,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:03,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:03,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:03,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:03,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:03,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:03,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:03,626 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:03,626 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:03,629 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:03,630 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:03,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:03,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:03,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:03,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:03,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:03,635 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:03,635 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:03,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:03,636 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:03,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:03,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:03,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:03,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:03,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:03,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:03,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:03,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:03,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:03,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:03,642 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:03,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:03,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:03,642 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:03,643 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_6090d8f0-95d6-4abf-a612-433f90bc4f77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f0c9018ad5a3307ca17a327503d3e78d6b57daa0dbd1bfcb592e3c4d78b33a [2023-11-19 07:44:04,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:04,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:04,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:04,054 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:04,054 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:04,056 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i [2023-11-19 07:44:07,151 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:07,465 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:07,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i [2023-11-19 07:44:07,479 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/data/472c8dd65/43d6fb2267904587bd628112e3708bf9/FLAG594622bd5 [2023-11-19 07:44:07,497 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/data/472c8dd65/43d6fb2267904587bd628112e3708bf9 [2023-11-19 07:44:07,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:07,506 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:07,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:07,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:07,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:07,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:07" (1/1) ... [2023-11-19 07:44:07,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9ba28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07, skipping insertion in model container [2023-11-19 07:44:07,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:07" (1/1) ... [2023-11-19 07:44:07,594 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:07,739 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_6090d8f0-95d6-4abf-a612-433f90bc4f77/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i[915,928] [2023-11-19 07:44:07,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:07,938 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:07,956 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_6090d8f0-95d6-4abf-a612-433f90bc4f77/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i[915,928] [2023-11-19 07:44:08,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:08,101 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:08,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08 WrapperNode [2023-11-19 07:44:08,102 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:08,103 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:08,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:08,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:08,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,231 INFO L138 Inliner]: procedures = 26, calls = 71, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 418 [2023-11-19 07:44:08,232 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:08,233 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:08,233 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:08,233 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:08,243 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,269 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:08,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:08,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:08,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:08,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (1/1) ... [2023-11-19 07:44:08,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:08,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:08,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:08,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:44:08,450 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:44:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:08,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:08,599 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:08,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:09,657 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:09,672 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:09,672 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:44:09,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:09 BoogieIcfgContainer [2023-11-19 07:44:09,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:09,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:09,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:09,693 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:09,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:07" (1/3) ... [2023-11-19 07:44:09,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3255458c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:09, skipping insertion in model container [2023-11-19 07:44:09,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:08" (2/3) ... [2023-11-19 07:44:09,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3255458c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:09, skipping insertion in model container [2023-11-19 07:44:09,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:09" (3/3) ... [2023-11-19 07:44:09,698 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-6.i [2023-11-19 07:44:09,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:09,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:44:09,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:09,784 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;@1a7bd28f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:09,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:44:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 176 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 116 states have internal predecessors, (169), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-19 07:44:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 07:44:09,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:09,850 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:09,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:09,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2003490361, now seen corresponding path program 1 times [2023-11-19 07:44:09,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:09,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169361143] [2023-11-19 07:44:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:09,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:10,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:10,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169361143] [2023-11-19 07:44:10,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:44:10,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185131627] [2023-11-19 07:44:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:10,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:10,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:10,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:10,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:44:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:10,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:44:10,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2023-11-19 07:44:10,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:10,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185131627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:10,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:10,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:10,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137883413] [2023-11-19 07:44:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:10,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:44:10,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:10,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:44:10,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:44:10,946 INFO L87 Difference]: Start difference. First operand has 176 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 116 states have internal predecessors, (169), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-19 07:44:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:11,002 INFO L93 Difference]: Finished difference Result 343 states and 618 transitions. [2023-11-19 07:44:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:44:11,004 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) Word has length 370 [2023-11-19 07:44:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:11,015 INFO L225 Difference]: With dead ends: 343 [2023-11-19 07:44:11,016 INFO L226 Difference]: Without dead ends: 170 [2023-11-19 07:44:11,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 369 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 07:44:11,025 INFO L413 NwaCegarLoop]: 272 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, 272 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 07:44:11,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-19 07:44:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-19 07:44:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 110 states have (on average 1.4181818181818182) internal successors, (156), 110 states have internal predecessors, (156), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-19 07:44:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 272 transitions. [2023-11-19 07:44:11,093 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 272 transitions. Word has length 370 [2023-11-19 07:44:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:11,094 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 272 transitions. [2023-11-19 07:44:11,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-19 07:44:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 272 transitions. [2023-11-19 07:44:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 07:44:11,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:11,104 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:11,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:11,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:44:11,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:11,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash -956276617, now seen corresponding path program 1 times [2023-11-19 07:44:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:11,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484572494] [2023-11-19 07:44:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:11,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978146807] [2023-11-19 07:44:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:11,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:11,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:11,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:44:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:11,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:11,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-19 07:44:11,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:11,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:11,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484572494] [2023-11-19 07:44:11,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:11,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978146807] [2023-11-19 07:44:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978146807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:11,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:11,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214868087] [2023-11-19 07:44:11,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:11,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:11,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:11,914 INFO L87 Difference]: Start difference. First operand 170 states and 272 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-19 07:44:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:12,108 INFO L93 Difference]: Finished difference Result 493 states and 791 transitions. [2023-11-19 07:44:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 370 [2023-11-19 07:44:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:12,124 INFO L225 Difference]: With dead ends: 493 [2023-11-19 07:44:12,124 INFO L226 Difference]: Without dead ends: 326 [2023-11-19 07:44:12,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 368 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 07:44:12,132 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 247 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:12,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 560 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-19 07:44:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 198. [2023-11-19 07:44:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 138 states have (on average 1.4565217391304348) internal successors, (201), 138 states have internal predecessors, (201), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-19 07:44:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 317 transitions. [2023-11-19 07:44:12,216 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 317 transitions. Word has length 370 [2023-11-19 07:44:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:12,221 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 317 transitions. [2023-11-19 07:44:12,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-19 07:44:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 317 transitions. [2023-11-19 07:44:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 07:44:12,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:12,236 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:12,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:12,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:12,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:12,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash -815728007, now seen corresponding path program 1 times [2023-11-19 07:44:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991651557] [2023-11-19 07:44:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:12,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:12,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:12,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816813871] [2023-11-19 07:44:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:12,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:12,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:12,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:12,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:44:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:12,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:44:12,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-19 07:44:13,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:13,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:13,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991651557] [2023-11-19 07:44:13,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:13,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816813871] [2023-11-19 07:44:13,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816813871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:13,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:13,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844806281] [2023-11-19 07:44:13,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:13,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:13,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:13,530 INFO L87 Difference]: Start difference. First operand 198 states and 317 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-19 07:44:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:13,871 INFO L93 Difference]: Finished difference Result 589 states and 946 transitions. [2023-11-19 07:44:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 370 [2023-11-19 07:44:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:13,879 INFO L225 Difference]: With dead ends: 589 [2023-11-19 07:44:13,879 INFO L226 Difference]: Without dead ends: 394 [2023-11-19 07:44:13,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:13,884 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 166 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:13,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 780 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:44:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-19 07:44:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 307. [2023-11-19 07:44:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 188 states have (on average 1.377659574468085) internal successors, (259), 188 states have internal predecessors, (259), 116 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-19 07:44:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 491 transitions. [2023-11-19 07:44:13,948 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 491 transitions. Word has length 370 [2023-11-19 07:44:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:13,949 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 491 transitions. [2023-11-19 07:44:13,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-19 07:44:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 491 transitions. [2023-11-19 07:44:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 07:44:13,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:13,958 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:13,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:14,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:44:14,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:14,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:14,182 INFO L85 PathProgramCache]: Analyzing trace with hash 28277495, now seen corresponding path program 1 times [2023-11-19 07:44:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:14,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241333281] [2023-11-19 07:44:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:14,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:14,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446378697] [2023-11-19 07:44:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:14,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:14,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:14,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:44:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:44:14,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 4165 proven. 423 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-11-19 07:44:17,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 279 proven. 225 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2023-11-19 07:44:25,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:25,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241333281] [2023-11-19 07:44:25,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446378697] [2023-11-19 07:44:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446378697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:25,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:25,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2023-11-19 07:44:25,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60601146] [2023-11-19 07:44:25,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:25,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:44:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:44:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:44:25,214 INFO L87 Difference]: Start difference. First operand 307 states and 491 transitions. Second operand has 33 states, 33 states have (on average 5.212121212121212) internal successors, (172), 32 states have internal predecessors, (172), 10 states have call successors, (97), 6 states have call predecessors, (97), 12 states have return successors, (98), 10 states have call predecessors, (98), 10 states have call successors, (98) [2023-11-19 07:44:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:33,499 INFO L93 Difference]: Finished difference Result 1094 states and 1669 transitions. [2023-11-19 07:44:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-19 07:44:33,500 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.212121212121212) internal successors, (172), 32 states have internal predecessors, (172), 10 states have call successors, (97), 6 states have call predecessors, (97), 12 states have return successors, (98), 10 states have call predecessors, (98), 10 states have call successors, (98) Word has length 370 [2023-11-19 07:44:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:33,508 INFO L225 Difference]: With dead ends: 1094 [2023-11-19 07:44:33,508 INFO L226 Difference]: Without dead ends: 899 [2023-11-19 07:44:33,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3344 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2655, Invalid=8687, Unknown=0, NotChecked=0, Total=11342 [2023-11-19 07:44:33,515 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1884 mSDsluCounter, 2429 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 1018 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 2800 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1018 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:33,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 2800 Invalid, 3987 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1018 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-19 07:44:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-11-19 07:44:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 618. [2023-11-19 07:44:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 404 states have (on average 1.3440594059405941) internal successors, (543), 406 states have internal predecessors, (543), 192 states have call successors, (192), 21 states have call predecessors, (192), 21 states have return successors, (192), 190 states have call predecessors, (192), 192 states have call successors, (192) [2023-11-19 07:44:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 927 transitions. [2023-11-19 07:44:33,626 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 927 transitions. Word has length 370 [2023-11-19 07:44:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:33,627 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 927 transitions. [2023-11-19 07:44:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.212121212121212) internal successors, (172), 32 states have internal predecessors, (172), 10 states have call successors, (97), 6 states have call predecessors, (97), 12 states have return successors, (98), 10 states have call predecessors, (98), 10 states have call successors, (98) [2023-11-19 07:44:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 927 transitions. [2023-11-19 07:44:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-19 07:44:33,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:33,637 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:33,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:44:33,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:33,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:33,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1058873401, now seen corresponding path program 1 times [2023-11-19 07:44:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:33,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335492680] [2023-11-19 07:44:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:33,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:33,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084728028] [2023-11-19 07:44:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:33,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:33,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:34,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:44:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:34,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:44:34,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 2661 proven. 45 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2023-11-19 07:44:34,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-19 07:44:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335492680] [2023-11-19 07:44:34,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084728028] [2023-11-19 07:44:34,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084728028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:34,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:34,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-19 07:44:34,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140754635] [2023-11-19 07:44:34,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:34,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:44:34,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:34,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:44:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:34,880 INFO L87 Difference]: Start difference. First operand 618 states and 927 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-19 07:44:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:36,190 INFO L93 Difference]: Finished difference Result 1615 states and 2414 transitions. [2023-11-19 07:44:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:44:36,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 371 [2023-11-19 07:44:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:36,207 INFO L225 Difference]: With dead ends: 1615 [2023-11-19 07:44:36,207 INFO L226 Difference]: Without dead ends: 1133 [2023-11-19 07:44:36,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 733 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:44:36,212 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 635 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:36,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 871 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:44:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2023-11-19 07:44:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 715. [2023-11-19 07:44:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 498 states have (on average 1.3795180722891567) internal successors, (687), 500 states have internal predecessors, (687), 192 states have call successors, (192), 24 states have call predecessors, (192), 24 states have return successors, (192), 190 states have call predecessors, (192), 192 states have call successors, (192) [2023-11-19 07:44:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1071 transitions. [2023-11-19 07:44:36,356 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1071 transitions. Word has length 371 [2023-11-19 07:44:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:36,357 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 1071 transitions. [2023-11-19 07:44:36,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-19 07:44:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1071 transitions. [2023-11-19 07:44:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 07:44:36,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:36,364 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:36,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:36,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:36,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:36,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1027177245, now seen corresponding path program 1 times [2023-11-19 07:44:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563246377] [2023-11-19 07:44:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:36,666 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:36,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694186978] [2023-11-19 07:44:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:36,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:36,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:36,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:36,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:44:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:37,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:37,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-19 07:44:37,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:37,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563246377] [2023-11-19 07:44:37,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694186978] [2023-11-19 07:44:37,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694186978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:37,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616459933] [2023-11-19 07:44:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:37,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:37,050 INFO L87 Difference]: Start difference. First operand 715 states and 1071 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-19 07:44:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:37,187 INFO L93 Difference]: Finished difference Result 1290 states and 1944 transitions. [2023-11-19 07:44:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:37,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 372 [2023-11-19 07:44:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:37,196 INFO L225 Difference]: With dead ends: 1290 [2023-11-19 07:44:37,197 INFO L226 Difference]: Without dead ends: 715 [2023-11-19 07:44:37,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 370 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 07:44:37,202 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 46 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:37,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 476 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-11-19 07:44:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 715. [2023-11-19 07:44:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 498 states have (on average 1.3714859437751004) internal successors, (683), 500 states have internal predecessors, (683), 192 states have call successors, (192), 24 states have call predecessors, (192), 24 states have return successors, (192), 190 states have call predecessors, (192), 192 states have call successors, (192) [2023-11-19 07:44:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1067 transitions. [2023-11-19 07:44:37,310 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1067 transitions. Word has length 372 [2023-11-19 07:44:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:37,312 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 1067 transitions. [2023-11-19 07:44:37,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-19 07:44:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1067 transitions. [2023-11-19 07:44:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 07:44:37,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:37,317 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:37,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:37,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:44:37,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:37,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash -893163739, now seen corresponding path program 1 times [2023-11-19 07:44:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:37,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81894862] [2023-11-19 07:44:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:37,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:37,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541118515] [2023-11-19 07:44:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:37,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:37,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:37,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:44:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:37,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 07:44:37,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3548 proven. 588 refuted. 0 times theorem prover too weak. 2476 trivial. 0 not checked. [2023-11-19 07:44:42,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:46,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81894862] [2023-11-19 07:44:46,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541118515] [2023-11-19 07:44:46,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541118515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:46,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:46,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-19 07:44:46,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202262805] [2023-11-19 07:44:46,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:46,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:44:46,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:44:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1091, Unknown=1, NotChecked=0, Total=1406 [2023-11-19 07:44:46,416 INFO L87 Difference]: Start difference. First operand 715 states and 1067 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 21 states have internal predecessors, (112), 8 states have call successors, (58), 8 states have call predecessors, (58), 10 states have return successors, (58), 8 states have call predecessors, (58), 8 states have call successors, (58) [2023-11-19 07:44:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:50,751 INFO L93 Difference]: Finished difference Result 1598 states and 2336 transitions. [2023-11-19 07:44:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-19 07:44:50,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 21 states have internal predecessors, (112), 8 states have call successors, (58), 8 states have call predecessors, (58), 10 states have return successors, (58), 8 states have call predecessors, (58), 8 states have call successors, (58) Word has length 372 [2023-11-19 07:44:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:50,760 INFO L225 Difference]: With dead ends: 1598 [2023-11-19 07:44:50,760 INFO L226 Difference]: Without dead ends: 1023 [2023-11-19 07:44:50,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1479, Invalid=4372, Unknown=1, NotChecked=0, Total=5852 [2023-11-19 07:44:50,766 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 278 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:50,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2281 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 07:44:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2023-11-19 07:44:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 442. [2023-11-19 07:44:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 303 states have (on average 1.33003300330033) internal successors, (403), 303 states have internal predecessors, (403), 116 states have call successors, (116), 22 states have call predecessors, (116), 22 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-19 07:44:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 635 transitions. [2023-11-19 07:44:50,867 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 635 transitions. Word has length 372 [2023-11-19 07:44:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:50,868 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 635 transitions. [2023-11-19 07:44:50,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 21 states have internal predecessors, (112), 8 states have call successors, (58), 8 states have call predecessors, (58), 10 states have return successors, (58), 8 states have call predecessors, (58), 8 states have call successors, (58) [2023-11-19 07:44:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 635 transitions. [2023-11-19 07:44:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 07:44:50,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:50,873 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:50,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:51,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 476183711, now seen corresponding path program 1 times [2023-11-19 07:44:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302953853] [2023-11-19 07:44:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:51,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:51,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694230094] [2023-11-19 07:44:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:51,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:51,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:51,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6090d8f0-95d6-4abf-a612-433f90bc4f77/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:44:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:51,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:51,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-19 07:44:51,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302953853] [2023-11-19 07:44:51,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694230094] [2023-11-19 07:44:51,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694230094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:51,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:51,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:44:51,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768512240] [2023-11-19 07:44:51,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:51,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:44:51,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:44:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:51,553 INFO L87 Difference]: Start difference. First operand 442 states and 635 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58)