./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.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_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/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_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/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_b43162c3-0960-4183-a2b4-212757d4759a/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 aa1b7e3020c9e54f93d45078f4a249ca3b737cc17c725ce83b71e2a4a5a42766 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:04,899 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:04,961 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:04,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:04,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:04,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:04,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:04,994 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:04,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:04,995 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:04,996 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:04,997 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:04,997 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:04,998 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:04,998 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:04,999 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:05,000 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:05,000 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:05,001 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:05,001 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:05,002 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:05,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:05,009 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:05,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:05,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:05,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:05,012 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:05,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:05,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:05,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:05,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:05,014 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:05,014 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:05,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:05,015 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:05,016 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:05,016 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:05,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:05,017 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:05,017 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_b43162c3-0960-4183-a2b4-212757d4759a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa1b7e3020c9e54f93d45078f4a249ca3b737cc17c725ce83b71e2a4a5a42766 [2023-11-19 07:40:05,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:05,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:05,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:05,335 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:05,336 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:05,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i [2023-11-19 07:40:08,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:08,850 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:08,852 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i [2023-11-19 07:40:08,866 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/data/cf826c377/7b9a5a4d708c43ae8b615e2754775a46/FLAGa8424b3fb [2023-11-19 07:40:08,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/data/cf826c377/7b9a5a4d708c43ae8b615e2754775a46 [2023-11-19 07:40:08,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:08,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:08,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:08,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:08,908 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:08,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:08" (1/1) ... [2023-11-19 07:40:08,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0044eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:08, skipping insertion in model container [2023-11-19 07:40:08,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:08" (1/1) ... [2023-11-19 07:40:08,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:09,126 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_b43162c3-0960-4183-a2b4-212757d4759a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i[915,928] [2023-11-19 07:40:09,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:09,212 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:09,227 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_b43162c3-0960-4183-a2b4-212757d4759a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i[915,928] [2023-11-19 07:40:09,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:09,278 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:09,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09 WrapperNode [2023-11-19 07:40:09,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:09,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:09,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:09,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:09,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,357 INFO L138 Inliner]: procedures = 26, calls = 26, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 177 [2023-11-19 07:40:09,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:09,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:09,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:09,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:09,368 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,373 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,393 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:09,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:09,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:09,400 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:09,401 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (1/1) ... [2023-11-19 07:40:09,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:09,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:09,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:40:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:40:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:09,661 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:09,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:10,272 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:10,284 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:10,284 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:40:10,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:10 BoogieIcfgContainer [2023-11-19 07:40:10,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:10,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:10,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:10,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:10,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:08" (1/3) ... [2023-11-19 07:40:10,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118e9661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:10, skipping insertion in model container [2023-11-19 07:40:10,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:09" (2/3) ... [2023-11-19 07:40:10,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118e9661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:10, skipping insertion in model container [2023-11-19 07:40:10,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:10" (3/3) ... [2023-11-19 07:40:10,313 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_50-1loop_file-34.i [2023-11-19 07:40:10,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:10,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:40:10,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:10,448 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;@71be537c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:10,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:40:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 53 states have internal predecessors, (79), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 07:40:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-19 07:40:10,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:10,479 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:10,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:10,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash -399624424, now seen corresponding path program 1 times [2023-11-19 07:40:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:10,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380610673] [2023-11-19 07:40:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:10,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380610673] [2023-11-19 07:40:10,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:40:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234642167] [2023-11-19 07:40:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:10,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:10,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:10,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:10,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:40:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:11,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:40:11,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-19 07:40:11,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234642167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:11,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:11,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600997844] [2023-11-19 07:40:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:11,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:11,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:11,174 INFO L87 Difference]: Start difference. First operand has 68 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 53 states have internal predecessors, (79), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 07:40:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:11,216 INFO L93 Difference]: Finished difference Result 133 states and 220 transitions. [2023-11-19 07:40:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:11,219 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 94 [2023-11-19 07:40:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:11,231 INFO L225 Difference]: With dead ends: 133 [2023-11-19 07:40:11,232 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 07:40:11,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 93 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 07:40:11,241 INFO L413 NwaCegarLoop]: 102 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, 102 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 07:40:11,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 07:40:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 07:40:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.469387755102041) internal successors, (72), 49 states have internal predecessors, (72), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 07:40:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 98 transitions. [2023-11-19 07:40:11,308 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 98 transitions. Word has length 94 [2023-11-19 07:40:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:11,309 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 98 transitions. [2023-11-19 07:40:11,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 07:40:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 98 transitions. [2023-11-19 07:40:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-19 07:40:11,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:11,317 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:11,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:40:11,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:40:11,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:11,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash -527355494, now seen corresponding path program 1 times [2023-11-19 07:40:11,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:11,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070068490] [2023-11-19 07:40:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:11,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:11,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:11,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264877748] [2023-11-19 07:40:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:11,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:11,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:11,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:11,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:11,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:40:11,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-19 07:40:12,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:12,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:12,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070068490] [2023-11-19 07:40:12,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:12,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264877748] [2023-11-19 07:40:12,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264877748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:12,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:12,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:12,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400035623] [2023-11-19 07:40:12,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:12,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:12,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:12,083 INFO L87 Difference]: Start difference. First operand 64 states and 98 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:12,317 INFO L93 Difference]: Finished difference Result 187 states and 287 transitions. [2023-11-19 07:40:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 94 [2023-11-19 07:40:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:12,322 INFO L225 Difference]: With dead ends: 187 [2023-11-19 07:40:12,322 INFO L226 Difference]: Without dead ends: 126 [2023-11-19 07:40:12,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:12,325 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 124 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:12,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 390 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:40:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-19 07:40:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 66. [2023-11-19 07:40:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 07:40:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 100 transitions. [2023-11-19 07:40:12,346 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 100 transitions. Word has length 94 [2023-11-19 07:40:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:12,348 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 100 transitions. [2023-11-19 07:40:12,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 100 transitions. [2023-11-19 07:40:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 07:40:12,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:12,352 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:12,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:40:12,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:12,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:12,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -291337622, now seen corresponding path program 1 times [2023-11-19 07:40:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:12,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247838846] [2023-11-19 07:40:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:12,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:12,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895341617] [2023-11-19 07:40:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:12,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:12,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:12,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:12,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:40:12,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-19 07:40:12,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:12,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:12,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247838846] [2023-11-19 07:40:12,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:12,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895341617] [2023-11-19 07:40:12,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895341617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:12,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:12,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:12,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586043612] [2023-11-19 07:40:12,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:12,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:12,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:12,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:12,991 INFO L87 Difference]: Start difference. First operand 66 states and 100 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:13,132 INFO L93 Difference]: Finished difference Result 223 states and 340 transitions. [2023-11-19 07:40:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:13,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 95 [2023-11-19 07:40:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:13,137 INFO L225 Difference]: With dead ends: 223 [2023-11-19 07:40:13,137 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 07:40:13,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 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 07:40:13,140 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 120 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:13,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 311 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 07:40:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2023-11-19 07:40:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 100 states have (on average 1.45) internal successors, (145), 100 states have internal predecessors, (145), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 07:40:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 197 transitions. [2023-11-19 07:40:13,178 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 197 transitions. Word has length 95 [2023-11-19 07:40:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:13,179 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 197 transitions. [2023-11-19 07:40:13,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:13,180 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 197 transitions. [2023-11-19 07:40:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 07:40:13,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:13,183 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:13,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:13,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:13,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:13,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash -228830509, now seen corresponding path program 1 times [2023-11-19 07:40:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:13,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828524081] [2023-11-19 07:40:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:13,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:13,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:13,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433746851] [2023-11-19 07:40:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:13,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:13,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:13,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:40:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:13,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:40:13,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-19 07:40:14,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:14,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:14,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828524081] [2023-11-19 07:40:14,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:14,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433746851] [2023-11-19 07:40:14,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433746851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:14,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:14,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23992506] [2023-11-19 07:40:14,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:14,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:14,344 INFO L87 Difference]: Start difference. First operand 129 states and 197 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:14,710 INFO L93 Difference]: Finished difference Result 528 states and 804 transitions. [2023-11-19 07:40:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:40:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-19 07:40:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:14,719 INFO L225 Difference]: With dead ends: 528 [2023-11-19 07:40:14,719 INFO L226 Difference]: Without dead ends: 402 [2023-11-19 07:40:14,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:40:14,729 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 273 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:14,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 460 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:40:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-19 07:40:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2023-11-19 07:40:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 221 states have (on average 1.4434389140271493) internal successors, (319), 221 states have internal predecessors, (319), 65 states have call successors, (65), 5 states have call predecessors, (65), 5 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-19 07:40:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 449 transitions. [2023-11-19 07:40:14,809 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 449 transitions. Word has length 96 [2023-11-19 07:40:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:14,816 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 449 transitions. [2023-11-19 07:40:14,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 449 transitions. [2023-11-19 07:40:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 07:40:14,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:14,824 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:14,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:15,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:15,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:15,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1041302562, now seen corresponding path program 1 times [2023-11-19 07:40:15,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800963200] [2023-11-19 07:40:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:15,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:15,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989239525] [2023-11-19 07:40:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:15,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:15,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:15,068 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:15,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:40:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:15,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-19 07:40:15,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 213 proven. 45 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-19 07:40:23,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-19 07:40:29,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800963200] [2023-11-19 07:40:29,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:29,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989239525] [2023-11-19 07:40:29,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989239525] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:29,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:40:29,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 28 [2023-11-19 07:40:29,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398618437] [2023-11-19 07:40:29,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:29,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:40:29,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:29,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:40:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=593, Unknown=15, NotChecked=0, Total=756 [2023-11-19 07:40:29,577 INFO L87 Difference]: Start difference. First operand 292 states and 449 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:31,448 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse24 (mod c_~last_1_var_1_20~0 4294967296)) (.cse26 (+ c_~var_1_1~0 4294967296)) (.cse23 (mod c_~last_1_var_1_7~0 4294967296)) (.cse3 (mod c_~var_1_15~0 4294967296)) (.cse6 (= (mod c_~var_1_18~0 256) 0)) (.cse11 (mod c_~last_1_var_1_17~0 4294967296))) (let ((.cse10 (< 2147483647 .cse11)) (.cse5 (= (mod c_~var_1_12~0 256) c_~var_1_14~0)) (.cse4 (mod |c_ULTIMATE.start_step_~stepLocal_1~0#1| 4294967296)) (.cse0 (= 64 c_~var_1_14~0)) (.cse1 (not .cse6)) (.cse13 (+ .cse11 2147483646)) (.cse15 (forall ((v_z_62 Int)) (or (< 4294967295 v_z_62) (< .cse11 (+ (mod (mod .cse3 v_z_62) 4294967296) 2147483650)) (< v_z_62 0)))) (.cse7 (let ((.cse27 (= c_~var_1_1~0 .cse23))) (and (or (and (= .cse26 .cse23) (<= 2147483648 .cse23)) .cse27) (or (< .cse23 2147483648) (not .cse27))))) (.cse9 (mod (+ c_~var_1_1~0 c_~last_1_var_1_17~0) 4294967296)) (.cse8 (< .cse24 (+ .cse23 1))) (.cse19 (let ((.cse25 (= .cse24 c_~var_1_1~0))) (and (or (< .cse24 2147483648) (not .cse25)) (or (and (= .cse26 .cse24) (<= 2147483648 .cse24)) .cse25)))) (.cse2 (mod (+ c_~var_1_1~0 c_~var_1_20~0) 4294967296)) (.cse20 (< .cse23 .cse24))) (and (or .cse0 .cse1 (forall ((v_z_62 Int)) (or (< 4294967295 v_z_62) (< v_z_62 0) (< .cse2 (+ (mod (mod .cse3 v_z_62) 4294967296) 1))))) (or .cse0 .cse1 (forall ((v_z_62 Int)) (or (< 4294967295 v_z_62) (< .cse4 (+ (mod (mod .cse3 v_z_62) 4294967296) 1)) (< v_z_62 0)))) (or (forall ((v_z_64 Int)) (or (< v_z_64 0) (< 4294967295 v_z_64) (< .cse4 (+ (mod (mod .cse3 v_z_64) 4294967296) 1)))) .cse5 .cse6) (or (forall ((v_z_63 Int)) (or (< v_z_63 0) (< 4294967295 v_z_63) (< .cse2 (+ (mod (mod .cse3 v_z_63) 4294967296) 1)))) .cse7 .cse8) (or (forall ((v_z_63 Int)) (or (< .cse4 (+ (mod (mod .cse3 v_z_63) 4294967296) 1)) (< v_z_63 0) (< 4294967295 v_z_63))) .cse7 .cse8) (or (forall ((v_z_64 Int)) (or (< v_z_64 0) (< 4294967295 v_z_64) (< .cse2 (+ (mod (mod .cse3 v_z_64) 4294967296) 1)))) .cse5 .cse6) (or .cse5 .cse6 (forall ((v_z_64 Int)) (or (< v_z_64 0) (< .cse9 (+ (mod (mod .cse3 v_z_64) 4294967296) 1)) (< 4294967295 v_z_64)))) (or (and (or (forall ((v_z_64 Int)) (or (< v_z_64 0) (< 4294967295 v_z_64) (< 4294967294 (mod (mod .cse3 v_z_64) 4294967296)))) .cse10) (forall ((v_z_64 Int)) (or (< v_z_64 0) (< 4294967295 v_z_64) (< .cse11 (+ 2 (mod (mod .cse3 v_z_64) 4294967296)))))) .cse5 .cse6) (or .cse0 .cse1 (and (or .cse10 (forall ((v_z_62 Int)) (or (< 4294967295 v_z_62) (< 4294967294 (mod (mod .cse3 v_z_62) 4294967296)) (< v_z_62 0)))) (forall ((v_z_62 Int)) (or (< 4294967295 v_z_62) (< .cse11 (+ (mod (mod .cse3 v_z_62) 4294967296) 2)) (< v_z_62 0))))) (or (forall ((v_z_64 Int)) (let ((.cse12 (mod (mod .cse3 v_z_64) 4294967296))) (or (< v_z_64 0) (< 4294967295 v_z_64) (< 4294967294 .cse12) (= .cse12 (+ 4294967294 .cse11))))) .cse5 .cse6) (or (and (forall ((v_z_64 Int)) (or (< v_z_64 0) (< 4294967295 v_z_64) (< .cse11 (+ 2147483650 (mod (mod .cse3 v_z_64) 4294967296))))) (forall ((v_z_64 Int)) (let ((.cse14 (mod (mod .cse3 v_z_64) 4294967296))) (or (< v_z_64 0) (< .cse13 .cse14) (< 4294967295 v_z_64) (< 4294967294 .cse14))))) .cse5 .cse6) (or .cse0 .cse1 (forall ((v_z_62 Int)) (or (< 4294967295 v_z_62) (< v_z_62 0) (< .cse9 (+ (mod (mod .cse3 v_z_62) 4294967296) 1))))) (or .cse0 .cse1 (and .cse15 (let ((.cse16 (div (+ (- 6442450944) .cse11) 4294967296))) (or (< 0 (+ 2 .cse16)) (forall ((v_z_62 Int)) (let ((.cse17 (mod (mod .cse3 v_z_62) 4294967296))) (or (< 4294967295 v_z_62) (< .cse11 (+ .cse17 (* 4294967296 .cse16) 4294967299)) (< 4294967294 .cse17) (< v_z_62 0)))))) (forall ((v_z_62 Int)) (let ((.cse18 (mod (mod .cse3 v_z_62) 4294967296))) (or (< .cse13 (+ (* (div .cse11 4294967296) 4294967296) .cse18)) (< 4294967295 v_z_62) (< 4294967294 .cse18) (< v_z_62 0)))) (forall ((v_z_62 Int)) (or (< .cse11 (+ (mod (mod .cse3 v_z_62) 4294967296) 3)) (< 4294967295 v_z_62) (< v_z_62 0))))) (or .cse19 (forall ((v_z_65 Int)) (or (< .cse4 (+ (mod (mod .cse3 v_z_65) 4294967296) 1)) (< v_z_65 0) (< 4294967295 v_z_65))) .cse20) (or .cse19 (forall ((v_z_65 Int)) (or (< v_z_65 0) (< .cse9 (+ (mod (mod .cse3 v_z_65) 4294967296) 1)) (< 4294967295 v_z_65))) .cse20) (or (= (mod c_~var_1_1~0 4294967296) (mod c_~var_1_20~0 4294967296)) (forall ((v_z_60 Int)) (let ((.cse21 (mod (mod .cse3 v_z_60) 4294967296))) (or (< .cse21 .cse2) (< 4294967295 v_z_60) (< v_z_60 0) (< .cse4 (+ .cse21 1))))) (not (= c_~var_1_20~0 c_~var_1_17~0))) (or .cse0 .cse1 (and (forall ((v_z_62 Int)) (let ((.cse22 (mod (mod .cse3 v_z_62) 4294967296))) (or (< 4294967295 v_z_62) (< 4294967294 .cse22) (< .cse13 .cse22) (< v_z_62 0)))) .cse15)) (or .cse7 (forall ((v_z_63 Int)) (or (< v_z_63 0) (< 4294967295 v_z_63) (< .cse9 (+ (mod (mod .cse3 v_z_63) 4294967296) 1)))) .cse8) (or .cse19 (forall ((v_z_65 Int)) (or (< v_z_65 0) (< .cse2 (+ (mod (mod .cse3 v_z_65) 4294967296) 1)) (< 4294967295 v_z_65))) .cse20)))) is different from false [2023-11-19 07:40:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:36,494 INFO L93 Difference]: Finished difference Result 840 states and 1259 transitions. [2023-11-19 07:40:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:40:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-19 07:40:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:36,505 INFO L225 Difference]: With dead ends: 840 [2023-11-19 07:40:36,505 INFO L226 Difference]: Without dead ends: 590 [2023-11-19 07:40:36,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=204, Invalid=895, Unknown=27, NotChecked=64, Total=1190 [2023-11-19 07:40:36,509 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 287 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 74 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 74 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:36,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 476 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 74 Unknown, 15 Unchecked, 4.0s Time] [2023-11-19 07:40:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-11-19 07:40:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 456. [2023-11-19 07:40:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 361 states have (on average 1.4210526315789473) internal successors, (513), 365 states have internal predecessors, (513), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-19 07:40:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 683 transitions. [2023-11-19 07:40:36,714 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 683 transitions. Word has length 96 [2023-11-19 07:40:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:36,715 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 683 transitions. [2023-11-19 07:40:36,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 683 transitions. [2023-11-19 07:40:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 07:40:36,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:36,718 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:36,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:36,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:36,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:36,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1478657372, now seen corresponding path program 1 times [2023-11-19 07:40:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770169098] [2023-11-19 07:40:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:36,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:36,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:36,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697593797] [2023-11-19 07:40:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:36,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:36,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:37,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:40:37,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-19 07:40:41,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:41,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:41,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770169098] [2023-11-19 07:40:41,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:41,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697593797] [2023-11-19 07:40:41,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697593797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:41,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:41,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:40:41,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333410343] [2023-11-19 07:40:41,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:41,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:40:41,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:40:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:41,727 INFO L87 Difference]: Start difference. First operand 456 states and 683 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:44,335 INFO L93 Difference]: Finished difference Result 1275 states and 1903 transitions. [2023-11-19 07:40:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:40:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-19 07:40:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:44,347 INFO L225 Difference]: With dead ends: 1275 [2023-11-19 07:40:44,348 INFO L226 Difference]: Without dead ends: 1106 [2023-11-19 07:40:44,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:40:44,351 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 475 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:44,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 586 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:40:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2023-11-19 07:40:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1034. [2023-11-19 07:40:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 819 states have (on average 1.413919413919414) internal successors, (1158), 829 states have internal predecessors, (1158), 193 states have call successors, (193), 21 states have call predecessors, (193), 21 states have return successors, (193), 183 states have call predecessors, (193), 193 states have call successors, (193) [2023-11-19 07:40:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1544 transitions. [2023-11-19 07:40:44,705 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1544 transitions. Word has length 96 [2023-11-19 07:40:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:44,706 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1544 transitions. [2023-11-19 07:40:44,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1544 transitions. [2023-11-19 07:40:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 07:40:44,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:44,709 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:44,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:44,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:40:44,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:44,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1721360932, now seen corresponding path program 1 times [2023-11-19 07:40:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:44,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782738068] [2023-11-19 07:40:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:44,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:44,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955756692] [2023-11-19 07:40:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:44,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:44,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:45,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:40:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:45,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:40:45,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-19 07:40:46,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:46,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782738068] [2023-11-19 07:40:46,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:46,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955756692] [2023-11-19 07:40:46,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955756692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:46,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:46,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:40:46,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966434370] [2023-11-19 07:40:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:46,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:46,123 INFO L87 Difference]: Start difference. First operand 1034 states and 1544 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:47,109 INFO L93 Difference]: Finished difference Result 2590 states and 3819 transitions. [2023-11-19 07:40:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:40:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-19 07:40:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:47,126 INFO L225 Difference]: With dead ends: 2590 [2023-11-19 07:40:47,126 INFO L226 Difference]: Without dead ends: 1588 [2023-11-19 07:40:47,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:40:47,132 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 282 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:47,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 397 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:40:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2023-11-19 07:40:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1258. [2023-11-19 07:40:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1043 states have (on average 1.4247363374880153) internal successors, (1486), 1053 states have internal predecessors, (1486), 193 states have call successors, (193), 21 states have call predecessors, (193), 21 states have return successors, (193), 183 states have call predecessors, (193), 193 states have call successors, (193) [2023-11-19 07:40:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1872 transitions. [2023-11-19 07:40:47,497 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1872 transitions. Word has length 96 [2023-11-19 07:40:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:47,499 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1872 transitions. [2023-11-19 07:40:47,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 07:40:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1872 transitions. [2023-11-19 07:40:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 07:40:47,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:47,504 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:47,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:47,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:40:47,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:47,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1239947759, now seen corresponding path program 1 times [2023-11-19 07:40:47,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961026967] [2023-11-19 07:40:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:47,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779298101] [2023-11-19 07:40:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:47,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:47,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:40:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:40:47,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-19 07:40:48,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-19 07:40:48,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961026967] [2023-11-19 07:40:48,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779298101] [2023-11-19 07:40:48,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779298101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:48,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:48,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-19 07:40:48,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710963333] [2023-11-19 07:40:48,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:48,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:40:48,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:40:48,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:48,510 INFO L87 Difference]: Start difference. First operand 1258 states and 1872 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-19 07:40:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:49,570 INFO L93 Difference]: Finished difference Result 2066 states and 3039 transitions. [2023-11-19 07:40:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:40:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 96 [2023-11-19 07:40:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:49,591 INFO L225 Difference]: With dead ends: 2066 [2023-11-19 07:40:49,592 INFO L226 Difference]: Without dead ends: 1814 [2023-11-19 07:40:49,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:40:49,595 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 234 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:49,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 521 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:40:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2023-11-19 07:40:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1416. [2023-11-19 07:40:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1152 states have (on average 1.4027777777777777) internal successors, (1616), 1162 states have internal predecessors, (1616), 232 states have call successors, (232), 31 states have call predecessors, (232), 31 states have return successors, (232), 222 states have call predecessors, (232), 232 states have call successors, (232) [2023-11-19 07:40:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2080 transitions. [2023-11-19 07:40:50,130 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2080 transitions. Word has length 96 [2023-11-19 07:40:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:50,130 INFO L495 AbstractCegarLoop]: Abstraction has 1416 states and 2080 transitions. [2023-11-19 07:40:50,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-19 07:40:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2080 transitions. [2023-11-19 07:40:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 07:40:50,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:50,134 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:50,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 07:40:50,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:50,360 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:50,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash 30185312, now seen corresponding path program 1 times [2023-11-19 07:40:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:50,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270830079] [2023-11-19 07:40:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:50,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:50,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662310928] [2023-11-19 07:40:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:50,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:50,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:50,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:50,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43162c3-0960-4183-a2b4-212757d4759a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:40:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:50,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:40:50,715 INFO L285 TraceCheckSpWp]: Computing forward predicates...