./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/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_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/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_791e5d90-082d-4bcd-93b4-f6a06707eaa0/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 01664cc77fe0f94aba93d78be3bbb8d6dfcad417fd9d550a500a598597cc5b39 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:34,857 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:34,992 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:35,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:35,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:35,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:35,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:35,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:35,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:35,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:35,056 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:35,057 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:35,057 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:35,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:35,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:35,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:35,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:35,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:35,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:35,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:35,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:35,063 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:35,064 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:35,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:35,065 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:35,065 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:35,066 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:35,066 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:35,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:35,067 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:35,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:35,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:35,069 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:35,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:35,070 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:35,070 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:35,070 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:35,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:35,071 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:35,071 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_791e5d90-082d-4bcd-93b4-f6a06707eaa0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01664cc77fe0f94aba93d78be3bbb8d6dfcad417fd9d550a500a598597cc5b39 [2023-11-19 07:50:35,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:35,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:35,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:35,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:35,419 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:35,421 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i [2023-11-19 07:50:38,642 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:38,946 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:38,947 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i [2023-11-19 07:50:38,965 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/data/5219ac392/1929b9d556364077bce60e5593b8c608/FLAGa10643c42 [2023-11-19 07:50:38,984 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/data/5219ac392/1929b9d556364077bce60e5593b8c608 [2023-11-19 07:50:38,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:38,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:38,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:38,988 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:39,002 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:39,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50511654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39, skipping insertion in model container [2023-11-19 07:50:39,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:39,243 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_791e5d90-082d-4bcd-93b4-f6a06707eaa0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i[916,929] [2023-11-19 07:50:39,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:39,561 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:39,582 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_791e5d90-082d-4bcd-93b4-f6a06707eaa0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i[916,929] [2023-11-19 07:50:39,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:39,814 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:39,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39 WrapperNode [2023-11-19 07:50:39,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:39,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:39,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:39,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:39,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:39,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:39,985 INFO L138 Inliner]: procedures = 26, calls = 99, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 704 [2023-11-19 07:50:39,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:39,987 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:39,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:39,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:39,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:39,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,024 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,024 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:40,138 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:40,138 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:40,139 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:40,139 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (1/1) ... [2023-11-19 07:50:40,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:40,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:40,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:40,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:50:40,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:50:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:40,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:40,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:40,398 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:40,400 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:41,893 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:41,917 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:41,917 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:50:41,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:41 BoogieIcfgContainer [2023-11-19 07:50:41,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:41,936 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:41,936 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:41,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:41,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:38" (1/3) ... [2023-11-19 07:50:41,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eae373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:41, skipping insertion in model container [2023-11-19 07:50:41,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:39" (2/3) ... [2023-11-19 07:50:41,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eae373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:41, skipping insertion in model container [2023-11-19 07:50:41,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:41" (3/3) ... [2023-11-19 07:50:41,944 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-90.i [2023-11-19 07:50:41,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:41,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:50:42,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:42,055 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;@14b0d02b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:42,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:50:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 285 states, 196 states have (on average 1.5459183673469388) internal successors, (303), 197 states have internal predecessors, (303), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 07:50:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-19 07:50:42,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:42,132 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:42,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:42,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1240075034, now seen corresponding path program 1 times [2023-11-19 07:50:42,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:42,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651260605] [2023-11-19 07:50:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651260605] [2023-11-19 07:50:42,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:50:42,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498156418] [2023-11-19 07:50:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:42,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:42,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:50:43,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2023-11-19 07:50:43,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498156418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:43,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:43,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201521243] [2023-11-19 07:50:43,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:43,510 INFO L87 Difference]: Start difference. First operand has 285 states, 196 states have (on average 1.5459183673469388) internal successors, (303), 197 states have internal predecessors, (303), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-19 07:50:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:43,614 INFO L93 Difference]: Finished difference Result 563 states and 1030 transitions. [2023-11-19 07:50:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) Word has length 565 [2023-11-19 07:50:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:43,630 INFO L225 Difference]: With dead ends: 563 [2023-11-19 07:50:43,630 INFO L226 Difference]: Without dead ends: 281 [2023-11-19 07:50:43,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 564 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 07:50:43,641 INFO L413 NwaCegarLoop]: 466 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, 466 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 07:50:43,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-19 07:50:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2023-11-19 07:50:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 193 states have (on average 1.5233160621761659) internal successors, (294), 193 states have internal predecessors, (294), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 07:50:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 466 transitions. [2023-11-19 07:50:43,741 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 466 transitions. Word has length 565 [2023-11-19 07:50:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:43,742 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 466 transitions. [2023-11-19 07:50:43,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-19 07:50:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 466 transitions. [2023-11-19 07:50:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-19 07:50:43,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:43,762 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:43,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:50:43,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:43,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:43,980 INFO L85 PathProgramCache]: Analyzing trace with hash 690913038, now seen corresponding path program 1 times [2023-11-19 07:50:43,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:43,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659023249] [2023-11-19 07:50:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:43,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:44,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912879645] [2023-11-19 07:50:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:44,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:44,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:50:44,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:50:44,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:44,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659023249] [2023-11-19 07:50:44,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912879645] [2023-11-19 07:50:44,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912879645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:44,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:44,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:44,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384234268] [2023-11-19 07:50:44,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:44,843 INFO L87 Difference]: Start difference. First operand 281 states and 466 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:44,978 INFO L93 Difference]: Finished difference Result 791 states and 1311 transitions. [2023-11-19 07:50:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:44,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 565 [2023-11-19 07:50:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:44,988 INFO L225 Difference]: With dead ends: 791 [2023-11-19 07:50:44,988 INFO L226 Difference]: Without dead ends: 513 [2023-11-19 07:50:44,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 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 07:50:44,991 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 378 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:44,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 910 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-11-19 07:50:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2023-11-19 07:50:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 350 states have (on average 1.5142857142857142) internal successors, (530), 351 states have internal predecessors, (530), 157 states have call successors, (157), 2 states have call predecessors, (157), 2 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-19 07:50:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 844 transitions. [2023-11-19 07:50:45,069 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 844 transitions. Word has length 565 [2023-11-19 07:50:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:45,072 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 844 transitions. [2023-11-19 07:50:45,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 844 transitions. [2023-11-19 07:50:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-19 07:50:45,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:45,089 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:45,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:50:45,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:45,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -434567022, now seen corresponding path program 1 times [2023-11-19 07:50:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:45,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897940901] [2023-11-19 07:50:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:45,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:45,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:45,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880732954] [2023-11-19 07:50:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:45,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:45,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:45,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:45,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:50:46,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:50:46,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:46,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:46,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897940901] [2023-11-19 07:50:46,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:46,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880732954] [2023-11-19 07:50:46,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880732954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:46,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:46,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388053633] [2023-11-19 07:50:46,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:46,162 INFO L87 Difference]: Start difference. First operand 510 states and 844 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:46,296 INFO L93 Difference]: Finished difference Result 1516 states and 2513 transitions. [2023-11-19 07:50:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 565 [2023-11-19 07:50:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:46,315 INFO L225 Difference]: With dead ends: 1516 [2023-11-19 07:50:46,316 INFO L226 Difference]: Without dead ends: 1009 [2023-11-19 07:50:46,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 563 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 07:50:46,321 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 434 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:46,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 909 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2023-11-19 07:50:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 576. [2023-11-19 07:50:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 416 states have (on average 1.5360576923076923) internal successors, (639), 417 states have internal predecessors, (639), 157 states have call successors, (157), 2 states have call predecessors, (157), 2 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-19 07:50:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 953 transitions. [2023-11-19 07:50:46,455 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 953 transitions. Word has length 565 [2023-11-19 07:50:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:46,457 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 953 transitions. [2023-11-19 07:50:46,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 953 transitions. [2023-11-19 07:50:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-19 07:50:46,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:46,464 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:46,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:46,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:46,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:46,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:46,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1382727598, now seen corresponding path program 1 times [2023-11-19 07:50:46,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:46,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349268623] [2023-11-19 07:50:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:46,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:46,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437153149] [2023-11-19 07:50:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:46,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:46,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:47,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:50:48,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:48,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349268623] [2023-11-19 07:50:48,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437153149] [2023-11-19 07:50:48,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437153149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:48,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:48,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186375109] [2023-11-19 07:50:48,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:48,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:48,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:48,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:48,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:48,376 INFO L87 Difference]: Start difference. First operand 576 states and 953 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:49,220 INFO L93 Difference]: Finished difference Result 2295 states and 3803 transitions. [2023-11-19 07:50:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 565 [2023-11-19 07:50:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:49,235 INFO L225 Difference]: With dead ends: 2295 [2023-11-19 07:50:49,235 INFO L226 Difference]: Without dead ends: 1722 [2023-11-19 07:50:49,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:49,239 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 664 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:49,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 1438 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:50:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2023-11-19 07:50:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1176. [2023-11-19 07:50:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 857 states have (on average 1.5367561260210034) internal successors, (1317), 859 states have internal predecessors, (1317), 314 states have call successors, (314), 4 states have call predecessors, (314), 4 states have return successors, (314), 312 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-19 07:50:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1945 transitions. [2023-11-19 07:50:49,472 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1945 transitions. Word has length 565 [2023-11-19 07:50:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:49,474 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1945 transitions. [2023-11-19 07:50:49,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1945 transitions. [2023-11-19 07:50:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-19 07:50:49,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:49,481 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:49,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:49,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:49,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash -948998512, now seen corresponding path program 1 times [2023-11-19 07:50:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:49,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694347515] [2023-11-19 07:50:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:49,857 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:49,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965619015] [2023-11-19 07:50:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:49,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:49,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:50:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:50,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 4425 proven. 45 refuted. 0 times theorem prover too weak. 10150 trivial. 0 not checked. [2023-11-19 07:50:50,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-19 07:50:51,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:51,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694347515] [2023-11-19 07:50:51,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:51,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965619015] [2023-11-19 07:50:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965619015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:51,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:51,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:50:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472738865] [2023-11-19 07:50:51,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:51,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:51,269 INFO L87 Difference]: Start difference. First operand 1176 states and 1945 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-19 07:50:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:52,041 INFO L93 Difference]: Finished difference Result 2381 states and 3915 transitions. [2023-11-19 07:50:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:50:52,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) Word has length 565 [2023-11-19 07:50:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:52,053 INFO L225 Difference]: With dead ends: 2381 [2023-11-19 07:50:52,054 INFO L226 Difference]: Without dead ends: 1208 [2023-11-19 07:50:52,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1132 GetRequests, 1122 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:52,061 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 332 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:52,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 939 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:50:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2023-11-19 07:50:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1178. [2023-11-19 07:50:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 861 states have (on average 1.519163763066202) internal successors, (1308), 863 states have internal predecessors, (1308), 310 states have call successors, (310), 6 states have call predecessors, (310), 6 states have return successors, (310), 308 states have call predecessors, (310), 310 states have call successors, (310) [2023-11-19 07:50:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1928 transitions. [2023-11-19 07:50:52,254 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1928 transitions. Word has length 565 [2023-11-19 07:50:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:52,255 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1928 transitions. [2023-11-19 07:50:52,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-19 07:50:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1928 transitions. [2023-11-19 07:50:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-19 07:50:52,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:52,263 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:52,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:52,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:52,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash -747174578, now seen corresponding path program 1 times [2023-11-19 07:50:52,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:52,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495420567] [2023-11-19 07:50:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:52,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:52,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404914442] [2023-11-19 07:50:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:52,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:52,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:52,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:50:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:50:53,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 1233 proven. 9 refuted. 0 times theorem prover too weak. 13378 trivial. 0 not checked. [2023-11-19 07:50:53,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:50:53,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495420567] [2023-11-19 07:50:53,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404914442] [2023-11-19 07:50:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404914442] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:53,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:50:53,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-19 07:50:53,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037271984] [2023-11-19 07:50:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:53,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:53,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:53,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:53,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:50:53,807 INFO L87 Difference]: Start difference. First operand 1178 states and 1928 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:54,763 INFO L93 Difference]: Finished difference Result 3380 states and 5520 transitions. [2023-11-19 07:50:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:54,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 565 [2023-11-19 07:50:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:54,782 INFO L225 Difference]: With dead ends: 3380 [2023-11-19 07:50:54,783 INFO L226 Difference]: Without dead ends: 2205 [2023-11-19 07:50:54,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1121 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:50:54,790 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 1125 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:54,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1212 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:50:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2023-11-19 07:50:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2137. [2023-11-19 07:50:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1419 states have (on average 1.4503171247357294) internal successors, (2058), 1426 states have internal predecessors, (2058), 701 states have call successors, (701), 16 states have call predecessors, (701), 16 states have return successors, (701), 694 states have call predecessors, (701), 701 states have call successors, (701) [2023-11-19 07:50:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3460 transitions. [2023-11-19 07:50:55,168 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3460 transitions. Word has length 565 [2023-11-19 07:50:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:55,169 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 3460 transitions. [2023-11-19 07:50:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3460 transitions. [2023-11-19 07:50:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-19 07:50:55,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:55,177 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:55,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:50:55,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:55,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:55,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash -478286256, now seen corresponding path program 1 times [2023-11-19 07:50:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618114657] [2023-11-19 07:50:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:55,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:55,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993282940] [2023-11-19 07:50:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:55,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:55,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:55,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:50:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:56,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:50:56,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:50:57,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:57,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618114657] [2023-11-19 07:50:57,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993282940] [2023-11-19 07:50:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993282940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:57,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:57,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:57,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843902650] [2023-11-19 07:50:57,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:57,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:57,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:57,152 INFO L87 Difference]: Start difference. First operand 2137 states and 3460 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:57,448 INFO L93 Difference]: Finished difference Result 4142 states and 6711 transitions. [2023-11-19 07:50:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 565 [2023-11-19 07:50:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:57,467 INFO L225 Difference]: With dead ends: 4142 [2023-11-19 07:50:57,467 INFO L226 Difference]: Without dead ends: 2143 [2023-11-19 07:50:57,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 562 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 07:50:57,476 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 274 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:57,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1360 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2023-11-19 07:50:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2137. [2023-11-19 07:50:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1419 states have (on average 1.4474982381959127) internal successors, (2054), 1426 states have internal predecessors, (2054), 701 states have call successors, (701), 16 states have call predecessors, (701), 16 states have return successors, (701), 694 states have call predecessors, (701), 701 states have call successors, (701) [2023-11-19 07:50:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3456 transitions. [2023-11-19 07:50:57,814 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3456 transitions. Word has length 565 [2023-11-19 07:50:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:57,816 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 3456 transitions. [2023-11-19 07:50:57,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:50:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3456 transitions. [2023-11-19 07:50:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-19 07:50:57,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:57,844 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:57,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:58,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:58,063 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:58,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash -357944805, now seen corresponding path program 1 times [2023-11-19 07:50:58,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:58,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91452003] [2023-11-19 07:50:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:58,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:58,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452844028] [2023-11-19 07:50:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:58,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:58,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:58,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:50:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:50:59,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 4845 proven. 51 refuted. 0 times theorem prover too weak. 9724 trivial. 0 not checked. [2023-11-19 07:50:59,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 204 proven. 51 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-19 07:50:59,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91452003] [2023-11-19 07:50:59,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452844028] [2023-11-19 07:50:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452844028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:59,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:59,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-19 07:50:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451388602] [2023-11-19 07:50:59,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:50:59,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:50:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:59,797 INFO L87 Difference]: Start difference. First operand 2137 states and 3456 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-19 07:51:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:01,755 INFO L93 Difference]: Finished difference Result 6293 states and 10071 transitions. [2023-11-19 07:51:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:51:01,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 566 [2023-11-19 07:51:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:01,798 INFO L225 Difference]: With dead ends: 6293 [2023-11-19 07:51:01,798 INFO L226 Difference]: Without dead ends: 4294 [2023-11-19 07:51:01,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1123 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:51:01,810 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 1692 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:01,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1761 Valid, 1269 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:51:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2023-11-19 07:51:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 2568. [2023-11-19 07:51:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 1695 states have (on average 1.44070796460177) internal successors, (2442), 1704 states have internal predecessors, (2442), 846 states have call successors, (846), 26 states have call predecessors, (846), 26 states have return successors, (846), 837 states have call predecessors, (846), 846 states have call successors, (846) [2023-11-19 07:51:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 4134 transitions. [2023-11-19 07:51:02,591 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 4134 transitions. Word has length 566 [2023-11-19 07:51:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:02,592 INFO L495 AbstractCegarLoop]: Abstraction has 2568 states and 4134 transitions. [2023-11-19 07:51:02,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-19 07:51:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 4134 transitions. [2023-11-19 07:51:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-19 07:51:02,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:02,601 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:51:02,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 07:51:02,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:02,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:02,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:02,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1565283229, now seen corresponding path program 1 times [2023-11-19 07:51:02,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:02,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554453431] [2023-11-19 07:51:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:02,919 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913385412] [2023-11-19 07:51:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:02,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:02,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:02,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:51:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:03,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:51:03,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:51:05,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:51:05,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:05,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554453431] [2023-11-19 07:51:05,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:05,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913385412] [2023-11-19 07:51:05,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913385412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:05,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:05,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:51:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743060275] [2023-11-19 07:51:05,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:05,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:51:05,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:51:05,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:51:05,758 INFO L87 Difference]: Start difference. First operand 2568 states and 4134 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:51:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:06,285 INFO L93 Difference]: Finished difference Result 4100 states and 6637 transitions. [2023-11-19 07:51:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:51:06,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 566 [2023-11-19 07:51:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:06,300 INFO L225 Difference]: With dead ends: 4100 [2023-11-19 07:51:06,300 INFO L226 Difference]: Without dead ends: 1674 [2023-11-19 07:51:06,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 563 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 07:51:06,312 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 401 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:06,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1359 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:51:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2023-11-19 07:51:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1181. [2023-11-19 07:51:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 775 states have (on average 1.4412903225806453) internal successors, (1117), 778 states have internal predecessors, (1117), 392 states have call successors, (392), 13 states have call predecessors, (392), 13 states have return successors, (392), 389 states have call predecessors, (392), 392 states have call successors, (392) [2023-11-19 07:51:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1901 transitions. [2023-11-19 07:51:06,569 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1901 transitions. Word has length 566 [2023-11-19 07:51:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:06,571 INFO L495 AbstractCegarLoop]: Abstraction has 1181 states and 1901 transitions. [2023-11-19 07:51:06,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:51:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1901 transitions. [2023-11-19 07:51:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-19 07:51:06,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:06,579 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:51:06,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:06,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:51:06,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:06,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1244047070, now seen corresponding path program 1 times [2023-11-19 07:51:06,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:06,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271491908] [2023-11-19 07:51:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:06,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:06,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:06,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589404768] [2023-11-19 07:51:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:06,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:06,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:06,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:51:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:07,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:51:07,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:51:07,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:51:07,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:07,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271491908] [2023-11-19 07:51:07,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:07,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589404768] [2023-11-19 07:51:07,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589404768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:07,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:07,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:51:07,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070163000] [2023-11-19 07:51:07,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:07,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:51:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:51:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:51:07,736 INFO L87 Difference]: Start difference. First operand 1181 states and 1901 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:51:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:09,290 INFO L93 Difference]: Finished difference Result 4242 states and 6865 transitions. [2023-11-19 07:51:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:51:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 566 [2023-11-19 07:51:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:09,321 INFO L225 Difference]: With dead ends: 4242 [2023-11-19 07:51:09,322 INFO L226 Difference]: Without dead ends: 3225 [2023-11-19 07:51:09,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:51:09,329 INFO L413 NwaCegarLoop]: 1131 mSDtfsCounter, 1500 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1500 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:09,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1500 Valid, 1825 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:51:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2023-11-19 07:51:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2233. [2023-11-19 07:51:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 1512 states have (on average 1.4424603174603174) internal successors, (2181), 1518 states have internal predecessors, (2181), 698 states have call successors, (698), 22 states have call predecessors, (698), 22 states have return successors, (698), 692 states have call predecessors, (698), 698 states have call successors, (698) [2023-11-19 07:51:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 3577 transitions. [2023-11-19 07:51:09,874 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 3577 transitions. Word has length 566 [2023-11-19 07:51:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:09,876 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 3577 transitions. [2023-11-19 07:51:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:51:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 3577 transitions. [2023-11-19 07:51:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-19 07:51:09,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:09,885 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:51:09,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:10,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:51:10,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:10,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash -810317984, now seen corresponding path program 1 times [2023-11-19 07:51:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:10,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516457403] [2023-11-19 07:51:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:10,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:10,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:10,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582778325] [2023-11-19 07:51:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:10,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:10,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:51:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:10,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:51:10,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-19 07:51:11,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:51:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:11,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516457403] [2023-11-19 07:51:11,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:11,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582778325] [2023-11-19 07:51:11,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582778325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:11,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:11,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:51:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229683148] [2023-11-19 07:51:11,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:11,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:51:11,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:51:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:51:11,323 INFO L87 Difference]: Start difference. First operand 2233 states and 3577 transitions. Second operand has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:51:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:15,664 INFO L93 Difference]: Finished difference Result 8325 states and 13392 transitions. [2023-11-19 07:51:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:51:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 566 [2023-11-19 07:51:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:15,715 INFO L225 Difference]: With dead ends: 8325 [2023-11-19 07:51:15,716 INFO L226 Difference]: Without dead ends: 6256 [2023-11-19 07:51:15,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:51:15,726 INFO L413 NwaCegarLoop]: 1276 mSDtfsCounter, 3141 mSDsluCounter, 3374 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3141 SdHoareTripleChecker+Valid, 4650 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:15,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3141 Valid, 4650 Invalid, 2906 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1229 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-19 07:51:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2023-11-19 07:51:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4276. [2023-11-19 07:51:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 2925 states have (on average 1.4437606837606838) internal successors, (4223), 2937 states have internal predecessors, (4223), 1310 states have call successors, (1310), 40 states have call predecessors, (1310), 40 states have return successors, (1310), 1298 states have call predecessors, (1310), 1310 states have call successors, (1310) [2023-11-19 07:51:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 6843 transitions. [2023-11-19 07:51:16,809 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 6843 transitions. Word has length 566 [2023-11-19 07:51:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:16,810 INFO L495 AbstractCegarLoop]: Abstraction has 4276 states and 6843 transitions. [2023-11-19 07:51:16,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-19 07:51:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 6843 transitions. [2023-11-19 07:51:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-19 07:51:16,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:16,821 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:51:16,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:17,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:51:17,037 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:17,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash 762409758, now seen corresponding path program 1 times [2023-11-19 07:51:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:17,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212410667] [2023-11-19 07:51:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:17,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:17,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:17,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036241397] [2023-11-19 07:51:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:17,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:17,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:17,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_791e5d90-082d-4bcd-93b4-f6a06707eaa0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:51:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:18,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 1409 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:51:18,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 9469 proven. 333 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2023-11-19 07:51:19,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 303 proven. 204 refuted. 0 times theorem prover too weak. 14113 trivial. 0 not checked. [2023-11-19 07:51:20,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:20,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212410667] [2023-11-19 07:51:20,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036241397] [2023-11-19 07:51:20,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036241397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:20,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-19 07:51:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995880940] [2023-11-19 07:51:20,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:20,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:51:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:20,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:51:20,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:51:20,315 INFO L87 Difference]: Start difference. First operand 4276 states and 6843 transitions. Second operand has 19 states, 19 states have (on average 10.105263157894736) internal successors, (192), 18 states have internal predecessors, (192), 6 states have call successors, (133), 4 states have call predecessors, (133), 8 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-19 07:51:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:21,851 INFO L93 Difference]: Finished difference Result 8706 states and 13701 transitions. [2023-11-19 07:51:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:51:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 10.105263157894736) internal successors, (192), 18 states have internal predecessors, (192), 6 states have call successors, (133), 4 states have call predecessors, (133), 8 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) Word has length 566 [2023-11-19 07:51:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:21,881 INFO L225 Difference]: With dead ends: 8706 [2023-11-19 07:51:21,881 INFO L226 Difference]: Without dead ends: 4594 [2023-11-19 07:51:21,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1113 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:51:21,897 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 678 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:21,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1283 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:51:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4594 states.