./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_srvr_2a_alt.BV.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/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_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/s3_srvr_2a_alt.BV.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/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_0e9f4f55-1398-4431-b75e-f5c4931e18d7/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 ffdd9c6c8ed32275119d4b9d2dc66b9f80986fea1a039186a702d6c803e62485 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:02,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:02,948 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:03:02,959 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:02,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:03,004 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:03,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:03,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:03,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:03,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:03,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:03,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:03,017 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:03,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:03,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:03:03,020 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:03,020 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:03,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:03,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:03,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:03:03,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:03,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:03:03,024 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:03,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:03:03,025 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:03,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:03,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:03,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:03,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:03,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:03,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:03,030 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:03:03,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:03,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:03,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:03,032 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:03:03,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:03,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:03,033 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:03,033 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_0e9f4f55-1398-4431-b75e-f5c4931e18d7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ffdd9c6c8ed32275119d4b9d2dc66b9f80986fea1a039186a702d6c803e62485 [2023-11-19 08:03:03,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:03,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:03,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:03,390 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:03,390 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:03,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/bitvector/s3_srvr_2a_alt.BV.c.cil.c [2023-11-19 08:03:06,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:06,811 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:06,811 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/sv-benchmarks/c/bitvector/s3_srvr_2a_alt.BV.c.cil.c [2023-11-19 08:03:06,834 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/data/6f87f87cc/a3815da317684356aebed323d47ac24d/FLAGfe72a3244 [2023-11-19 08:03:06,855 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/data/6f87f87cc/a3815da317684356aebed323d47ac24d [2023-11-19 08:03:06,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:06,866 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:06,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:06,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:06,879 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:06,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:06" (1/1) ... [2023-11-19 08:03:06,882 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63532357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:06, skipping insertion in model container [2023-11-19 08:03:06,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:06" (1/1) ... [2023-11-19 08:03:06,947 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:07,174 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_0e9f4f55-1398-4431-b75e-f5c4931e18d7/sv-benchmarks/c/bitvector/s3_srvr_2a_alt.BV.c.cil.c[44811,44824] [2023-11-19 08:03:07,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:07,197 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:07,259 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_0e9f4f55-1398-4431-b75e-f5c4931e18d7/sv-benchmarks/c/bitvector/s3_srvr_2a_alt.BV.c.cil.c[44811,44824] [2023-11-19 08:03:07,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:07,279 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:07,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07 WrapperNode [2023-11-19 08:03:07,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:07,281 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:07,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:07,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:07,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,350 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 577 [2023-11-19 08:03:07,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:07,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:07,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:07,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:07,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:07,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:07,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:07,400 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:07,400 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (1/1) ... [2023-11-19 08:03:07,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:07,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:07,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:07,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:07,680 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:07,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:07,721 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-19 08:03:08,390 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2023-11-19 08:03:08,391 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2023-11-19 08:03:08,391 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:08,409 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:08,410 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:03:08,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:08 BoogieIcfgContainer [2023-11-19 08:03:08,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:08,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:08,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:08,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:08,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:06" (1/3) ... [2023-11-19 08:03:08,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0b2bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:08, skipping insertion in model container [2023-11-19 08:03:08,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:07" (2/3) ... [2023-11-19 08:03:08,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0b2bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:08, skipping insertion in model container [2023-11-19 08:03:08,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:08" (3/3) ... [2023-11-19 08:03:08,433 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_2a_alt.BV.c.cil.c [2023-11-19 08:03:08,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:08,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:03:08,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:08,522 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;@ef57e71, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:08,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:03:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:08,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 08:03:08,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:08,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:08,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:08,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1632002022, now seen corresponding path program 1 times [2023-11-19 08:03:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393238825] [2023-11-19 08:03:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:08,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393238825] [2023-11-19 08:03:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393238825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:09,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583173535] [2023-11-19 08:03:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:09,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:09,141 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:09,389 INFO L93 Difference]: Finished difference Result 314 states and 545 transitions. [2023-11-19 08:03:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:09,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-19 08:03:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:09,406 INFO L225 Difference]: With dead ends: 314 [2023-11-19 08:03:09,406 INFO L226 Difference]: Without dead ends: 161 [2023-11-19 08:03:09,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:09,414 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:09,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 176 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:03:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-19 08:03:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2023-11-19 08:03:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.6) internal successors, (248), 155 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 248 transitions. [2023-11-19 08:03:09,470 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 248 transitions. Word has length 44 [2023-11-19 08:03:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:09,471 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 248 transitions. [2023-11-19 08:03:09,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 248 transitions. [2023-11-19 08:03:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 08:03:09,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:09,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:09,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:03:09,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:09,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash -954580408, now seen corresponding path program 1 times [2023-11-19 08:03:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:09,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474629402] [2023-11-19 08:03:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:09,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:09,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474629402] [2023-11-19 08:03:09,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474629402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:09,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:09,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129618011] [2023-11-19 08:03:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:09,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:09,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:09,754 INFO L87 Difference]: Start difference. First operand 156 states and 248 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:09,983 INFO L93 Difference]: Finished difference Result 352 states and 565 transitions. [2023-11-19 08:03:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:09,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-19 08:03:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:09,992 INFO L225 Difference]: With dead ends: 352 [2023-11-19 08:03:09,993 INFO L226 Difference]: Without dead ends: 202 [2023-11-19 08:03:10,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,002 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 110 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:10,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 126 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:03:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-19 08:03:10,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2023-11-19 08:03:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.6326530612244898) internal successors, (320), 196 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 320 transitions. [2023-11-19 08:03:10,023 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 320 transitions. Word has length 45 [2023-11-19 08:03:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:10,023 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 320 transitions. [2023-11-19 08:03:10,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 320 transitions. [2023-11-19 08:03:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 08:03:10,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:10,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:10,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:03:10,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:10,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2033157093, now seen corresponding path program 1 times [2023-11-19 08:03:10,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:10,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309674822] [2023-11-19 08:03:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:10,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309674822] [2023-11-19 08:03:10,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309674822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:10,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:10,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623077708] [2023-11-19 08:03:10,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:10,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:10,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,135 INFO L87 Difference]: Start difference. First operand 197 states and 320 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:10,172 INFO L93 Difference]: Finished difference Result 569 states and 929 transitions. [2023-11-19 08:03:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:10,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-19 08:03:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:10,177 INFO L225 Difference]: With dead ends: 569 [2023-11-19 08:03:10,177 INFO L226 Difference]: Without dead ends: 380 [2023-11-19 08:03:10,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,179 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 111 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:10,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 475 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:10,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-19 08:03:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2023-11-19 08:03:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.6279683377308707) internal successors, (617), 379 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 617 transitions. [2023-11-19 08:03:10,219 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 617 transitions. Word has length 60 [2023-11-19 08:03:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:10,219 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 617 transitions. [2023-11-19 08:03:10,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 617 transitions. [2023-11-19 08:03:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 08:03:10,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:10,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:10,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:03:10,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:10,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2013663709, now seen corresponding path program 1 times [2023-11-19 08:03:10,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329273135] [2023-11-19 08:03:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:10,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329273135] [2023-11-19 08:03:10,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329273135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:10,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:10,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534059951] [2023-11-19 08:03:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:10,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:10,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:10,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,334 INFO L87 Difference]: Start difference. First operand 380 states and 617 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:10,371 INFO L93 Difference]: Finished difference Result 938 states and 1528 transitions. [2023-11-19 08:03:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-19 08:03:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:10,377 INFO L225 Difference]: With dead ends: 938 [2023-11-19 08:03:10,377 INFO L226 Difference]: Without dead ends: 566 [2023-11-19 08:03:10,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,390 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 148 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:10,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 330 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-19 08:03:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2023-11-19 08:03:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.6247787610619469) internal successors, (918), 565 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 918 transitions. [2023-11-19 08:03:10,422 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 918 transitions. Word has length 60 [2023-11-19 08:03:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:10,422 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 918 transitions. [2023-11-19 08:03:10,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 918 transitions. [2023-11-19 08:03:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 08:03:10,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:10,430 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:10,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:03:10,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:10,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:10,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1930486570, now seen corresponding path program 1 times [2023-11-19 08:03:10,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:10,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356351795] [2023-11-19 08:03:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:10,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 08:03:10,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356351795] [2023-11-19 08:03:10,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356351795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:10,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:10,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:10,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151274457] [2023-11-19 08:03:10,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:10,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:10,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,526 INFO L87 Difference]: Start difference. First operand 566 states and 918 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:10,711 INFO L93 Difference]: Finished difference Result 1336 states and 2193 transitions. [2023-11-19 08:03:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-11-19 08:03:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:10,721 INFO L225 Difference]: With dead ends: 1336 [2023-11-19 08:03:10,721 INFO L226 Difference]: Without dead ends: 778 [2023-11-19 08:03:10,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,723 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 43 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:10,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 263 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:03:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-11-19 08:03:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 766. [2023-11-19 08:03:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 1.461437908496732) internal successors, (1118), 765 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1118 transitions. [2023-11-19 08:03:10,763 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1118 transitions. Word has length 97 [2023-11-19 08:03:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:10,764 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 1118 transitions. [2023-11-19 08:03:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1118 transitions. [2023-11-19 08:03:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 08:03:10,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:10,770 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:10,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:03:10,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:10,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1496757484, now seen corresponding path program 1 times [2023-11-19 08:03:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384750314] [2023-11-19 08:03:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 08:03:10,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384750314] [2023-11-19 08:03:10,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384750314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:10,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:10,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:10,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316130241] [2023-11-19 08:03:10,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:10,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:10,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:10,954 INFO L87 Difference]: Start difference. First operand 766 states and 1118 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:11,153 INFO L93 Difference]: Finished difference Result 1653 states and 2450 transitions. [2023-11-19 08:03:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-11-19 08:03:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:11,162 INFO L225 Difference]: With dead ends: 1653 [2023-11-19 08:03:11,163 INFO L226 Difference]: Without dead ends: 895 [2023-11-19 08:03:11,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:11,170 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 81 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:11,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 224 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:03:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-11-19 08:03:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 859. [2023-11-19 08:03:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.456876456876457) internal successors, (1250), 858 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1250 transitions. [2023-11-19 08:03:11,206 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1250 transitions. Word has length 97 [2023-11-19 08:03:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:11,208 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1250 transitions. [2023-11-19 08:03:11,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1250 transitions. [2023-11-19 08:03:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 08:03:11,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:11,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:11,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:03:11,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:11,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1340556462, now seen corresponding path program 1 times [2023-11-19 08:03:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:11,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355098995] [2023-11-19 08:03:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 08:03:11,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:11,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355098995] [2023-11-19 08:03:11,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355098995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:11,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:11,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165372787] [2023-11-19 08:03:11,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:11,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:11,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:11,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:11,394 INFO L87 Difference]: Start difference. First operand 859 states and 1250 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:11,454 INFO L93 Difference]: Finished difference Result 1746 states and 2558 transitions. [2023-11-19 08:03:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:11,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-19 08:03:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:11,464 INFO L225 Difference]: With dead ends: 1746 [2023-11-19 08:03:11,464 INFO L226 Difference]: Without dead ends: 1153 [2023-11-19 08:03:11,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:11,466 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 111 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:11,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 484 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-11-19 08:03:11,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1153. [2023-11-19 08:03:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.4592013888888888) internal successors, (1681), 1152 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1681 transitions. [2023-11-19 08:03:11,512 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1681 transitions. Word has length 121 [2023-11-19 08:03:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:11,512 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1681 transitions. [2023-11-19 08:03:11,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1681 transitions. [2023-11-19 08:03:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 08:03:11,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:11,517 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:03:11,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:11,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2057017556, now seen corresponding path program 1 times [2023-11-19 08:03:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:11,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017254267] [2023-11-19 08:03:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:11,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 08:03:11,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:11,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017254267] [2023-11-19 08:03:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017254267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:11,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:11,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:11,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019333372] [2023-11-19 08:03:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:11,617 INFO L87 Difference]: Start difference. First operand 1153 states and 1681 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:11,677 INFO L93 Difference]: Finished difference Result 2297 states and 3379 transitions. [2023-11-19 08:03:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-19 08:03:11,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:11,687 INFO L225 Difference]: With dead ends: 2297 [2023-11-19 08:03:11,688 INFO L226 Difference]: Without dead ends: 1410 [2023-11-19 08:03:11,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:11,691 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 113 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:11,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 485 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2023-11-19 08:03:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1410. [2023-11-19 08:03:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 1.4698367636621719) internal successors, (2071), 1409 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2071 transitions. [2023-11-19 08:03:11,744 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2071 transitions. Word has length 121 [2023-11-19 08:03:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:11,744 INFO L495 AbstractCegarLoop]: Abstraction has 1410 states and 2071 transitions. [2023-11-19 08:03:11,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2071 transitions. [2023-11-19 08:03:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-19 08:03:11,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:11,750 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:11,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:03:11,751 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:11,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash -860101462, now seen corresponding path program 1 times [2023-11-19 08:03:11,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:11,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375852340] [2023-11-19 08:03:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:11,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-19 08:03:11,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375852340] [2023-11-19 08:03:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375852340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:11,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:11,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:11,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985925204] [2023-11-19 08:03:11,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:11,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:11,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:11,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:11,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:11,943 INFO L87 Difference]: Start difference. First operand 1410 states and 2071 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:12,150 INFO L93 Difference]: Finished difference Result 3017 states and 4490 transitions. [2023-11-19 08:03:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2023-11-19 08:03:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:12,167 INFO L225 Difference]: With dead ends: 3017 [2023-11-19 08:03:12,167 INFO L226 Difference]: Without dead ends: 1565 [2023-11-19 08:03:12,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:12,173 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:12,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 255 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:03:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2023-11-19 08:03:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2023-11-19 08:03:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 1.4392583120204603) internal successors, (2251), 1564 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2251 transitions. [2023-11-19 08:03:12,248 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2251 transitions. Word has length 225 [2023-11-19 08:03:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:12,248 INFO L495 AbstractCegarLoop]: Abstraction has 1565 states and 2251 transitions. [2023-11-19 08:03:12,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2251 transitions. [2023-11-19 08:03:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-19 08:03:12,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:12,257 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:12,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:03:12,258 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:12,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash -482554043, now seen corresponding path program 1 times [2023-11-19 08:03:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:12,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946044331] [2023-11-19 08:03:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 430 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-19 08:03:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946044331] [2023-11-19 08:03:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946044331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577297887] [2023-11-19 08:03:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:12,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:12,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:12,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:12,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:03:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:12,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:03:12,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 430 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-19 08:03:12,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 430 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-19 08:03:12,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577297887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:12,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:12,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-19 08:03:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014145670] [2023-11-19 08:03:12,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:12,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:03:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:12,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:03:12,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:03:12,989 INFO L87 Difference]: Start difference. First operand 1565 states and 2251 transitions. Second operand has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:13,802 INFO L93 Difference]: Finished difference Result 6075 states and 8721 transitions. [2023-11-19 08:03:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:03:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2023-11-19 08:03:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:13,831 INFO L225 Difference]: With dead ends: 6075 [2023-11-19 08:03:13,832 INFO L226 Difference]: Without dead ends: 4518 [2023-11-19 08:03:13,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:03:13,836 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 350 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:13,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1150 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:03:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2023-11-19 08:03:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3398. [2023-11-19 08:03:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 1.40270827200471) internal successors, (4765), 3397 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 4765 transitions. [2023-11-19 08:03:13,989 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 4765 transitions. Word has length 253 [2023-11-19 08:03:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:13,990 INFO L495 AbstractCegarLoop]: Abstraction has 3398 states and 4765 transitions. [2023-11-19 08:03:13,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 4765 transitions. [2023-11-19 08:03:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-19 08:03:14,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:14,002 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:14,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:03:14,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:14,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash -193734653, now seen corresponding path program 1 times [2023-11-19 08:03:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:14,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778343246] [2023-11-19 08:03:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:14,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-19 08:03:14,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:14,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778343246] [2023-11-19 08:03:14,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778343246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:14,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:14,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251502185] [2023-11-19 08:03:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:14,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:14,356 INFO L87 Difference]: Start difference. First operand 3398 states and 4765 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:14,529 INFO L93 Difference]: Finished difference Result 9681 states and 13694 transitions. [2023-11-19 08:03:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:14,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2023-11-19 08:03:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:14,555 INFO L225 Difference]: With dead ends: 9681 [2023-11-19 08:03:14,556 INFO L226 Difference]: Without dead ends: 4220 [2023-11-19 08:03:14,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:14,562 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 109 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:14,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 492 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2023-11-19 08:03:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3918. [2023-11-19 08:03:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 1.4237937196834312) internal successors, (5577), 3917 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5577 transitions. [2023-11-19 08:03:14,719 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5577 transitions. Word has length 253 [2023-11-19 08:03:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:14,719 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 5577 transitions. [2023-11-19 08:03:14,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5577 transitions. [2023-11-19 08:03:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-19 08:03:14,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:14,732 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:14,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:03:14,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:14,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1163625151, now seen corresponding path program 1 times [2023-11-19 08:03:14,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:14,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861016813] [2023-11-19 08:03:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:14,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2023-11-19 08:03:14,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:14,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861016813] [2023-11-19 08:03:14,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861016813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:14,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:14,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:14,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624951204] [2023-11-19 08:03:14,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:14,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:14,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:14,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:14,851 INFO L87 Difference]: Start difference. First operand 3918 states and 5577 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:15,096 INFO L93 Difference]: Finished difference Result 8008 states and 11372 transitions. [2023-11-19 08:03:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2023-11-19 08:03:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:15,123 INFO L225 Difference]: With dead ends: 8008 [2023-11-19 08:03:15,123 INFO L226 Difference]: Without dead ends: 4098 [2023-11-19 08:03:15,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:15,130 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:15,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 272 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4098 states. [2023-11-19 08:03:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 4056. [2023-11-19 08:03:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 4055 states have (on average 1.4167694204685573) internal successors, (5745), 4055 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 5745 transitions. [2023-11-19 08:03:15,354 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 5745 transitions. Word has length 253 [2023-11-19 08:03:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:15,355 INFO L495 AbstractCegarLoop]: Abstraction has 4056 states and 5745 transitions. [2023-11-19 08:03:15,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 5745 transitions. [2023-11-19 08:03:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-19 08:03:15,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:15,366 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:03:15,367 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:15,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1335839441, now seen corresponding path program 1 times [2023-11-19 08:03:15,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:15,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181033624] [2023-11-19 08:03:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-19 08:03:15,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:15,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181033624] [2023-11-19 08:03:15,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181033624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:15,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:15,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:15,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114796879] [2023-11-19 08:03:15,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:15,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:15,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:15,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:15,483 INFO L87 Difference]: Start difference. First operand 4056 states and 5745 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:15,714 INFO L93 Difference]: Finished difference Result 8622 states and 12220 transitions. [2023-11-19 08:03:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:15,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2023-11-19 08:03:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:15,743 INFO L225 Difference]: With dead ends: 8622 [2023-11-19 08:03:15,743 INFO L226 Difference]: Without dead ends: 4574 [2023-11-19 08:03:15,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:15,750 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 28 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:15,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 272 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2023-11-19 08:03:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 4406. [2023-11-19 08:03:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4405 states have (on average 1.3995459704880817) internal successors, (6165), 4405 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 6165 transitions. [2023-11-19 08:03:15,901 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 6165 transitions. Word has length 273 [2023-11-19 08:03:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:15,901 INFO L495 AbstractCegarLoop]: Abstraction has 4406 states and 6165 transitions. [2023-11-19 08:03:15,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 6165 transitions. [2023-11-19 08:03:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:03:15,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:15,932 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:15,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:03:15,932 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:15,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:15,933 INFO L85 PathProgramCache]: Analyzing trace with hash -257796221, now seen corresponding path program 1 times [2023-11-19 08:03:15,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:15,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769159772] [2023-11-19 08:03:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:15,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-19 08:03:16,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:16,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769159772] [2023-11-19 08:03:16,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769159772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:16,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:16,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492153097] [2023-11-19 08:03:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:16,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:16,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:16,050 INFO L87 Difference]: Start difference. First operand 4406 states and 6165 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:16,241 INFO L93 Difference]: Finished difference Result 9266 states and 12990 transitions. [2023-11-19 08:03:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 299 [2023-11-19 08:03:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:16,270 INFO L225 Difference]: With dead ends: 9266 [2023-11-19 08:03:16,270 INFO L226 Difference]: Without dead ends: 4868 [2023-11-19 08:03:16,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:16,277 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:16,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 272 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2023-11-19 08:03:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4784. [2023-11-19 08:03:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4784 states, 4783 states have (on average 1.382605059586034) internal successors, (6613), 4783 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4784 states to 4784 states and 6613 transitions. [2023-11-19 08:03:16,411 INFO L78 Accepts]: Start accepts. Automaton has 4784 states and 6613 transitions. Word has length 299 [2023-11-19 08:03:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:16,411 INFO L495 AbstractCegarLoop]: Abstraction has 4784 states and 6613 transitions. [2023-11-19 08:03:16,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4784 states and 6613 transitions. [2023-11-19 08:03:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-11-19 08:03:16,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:16,423 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:16,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:03:16,424 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:16,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash 212293102, now seen corresponding path program 1 times [2023-11-19 08:03:16,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:16,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597160136] [2023-11-19 08:03:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:16,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 627 proven. 0 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-11-19 08:03:16,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597160136] [2023-11-19 08:03:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597160136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:16,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:16,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018771021] [2023-11-19 08:03:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:16,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:16,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:16,597 INFO L87 Difference]: Start difference. First operand 4784 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:16,824 INFO L93 Difference]: Finished difference Result 9980 states and 13802 transitions. [2023-11-19 08:03:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2023-11-19 08:03:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:16,842 INFO L225 Difference]: With dead ends: 9980 [2023-11-19 08:03:16,842 INFO L226 Difference]: Without dead ends: 5204 [2023-11-19 08:03:16,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:16,851 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:16,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 272 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2023-11-19 08:03:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4391. [2023-11-19 08:03:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4391 states, 4390 states have (on average 1.3824601366742597) internal successors, (6069), 4390 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 6069 transitions. [2023-11-19 08:03:16,988 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 6069 transitions. Word has length 322 [2023-11-19 08:03:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:16,989 INFO L495 AbstractCegarLoop]: Abstraction has 4391 states and 6069 transitions. [2023-11-19 08:03:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 6069 transitions. [2023-11-19 08:03:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 08:03:17,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:17,002 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:17,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:03:17,002 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:17,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash -812160295, now seen corresponding path program 1 times [2023-11-19 08:03:17,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:17,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116015747] [2023-11-19 08:03:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 692 proven. 0 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-11-19 08:03:17,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:17,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116015747] [2023-11-19 08:03:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116015747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:17,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:17,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:17,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946033089] [2023-11-19 08:03:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:17,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:17,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:17,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:17,183 INFO L87 Difference]: Start difference. First operand 4391 states and 6069 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:17,411 INFO L93 Difference]: Finished difference Result 13143 states and 18162 transitions. [2023-11-19 08:03:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2023-11-19 08:03:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:17,431 INFO L225 Difference]: With dead ends: 13143 [2023-11-19 08:03:17,431 INFO L226 Difference]: Without dead ends: 8760 [2023-11-19 08:03:17,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:17,438 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 125 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:17,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 486 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8760 states. [2023-11-19 08:03:17,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8760 to 8575. [2023-11-19 08:03:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8575 states, 8574 states have (on average 1.385117797993935) internal successors, (11876), 8574 states have internal predecessors, (11876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8575 states to 8575 states and 11876 transitions. [2023-11-19 08:03:17,695 INFO L78 Accepts]: Start accepts. Automaton has 8575 states and 11876 transitions. Word has length 354 [2023-11-19 08:03:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:17,695 INFO L495 AbstractCegarLoop]: Abstraction has 8575 states and 11876 transitions. [2023-11-19 08:03:17,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 8575 states and 11876 transitions. [2023-11-19 08:03:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2023-11-19 08:03:17,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:17,713 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:17,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 08:03:17,713 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:17,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash 209922624, now seen corresponding path program 1 times [2023-11-19 08:03:17,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:17,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915664051] [2023-11-19 08:03:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:17,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 871 proven. 26 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2023-11-19 08:03:17,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:17,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915664051] [2023-11-19 08:03:17,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915664051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:17,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260360495] [2023-11-19 08:03:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:17,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:17,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:17,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:17,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:03:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:18,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:03:18,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2023-11-19 08:03:18,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:18,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260360495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:18,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:18,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 08:03:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056358929] [2023-11-19 08:03:18,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:18,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:18,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:18,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:18,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:18,495 INFO L87 Difference]: Start difference. First operand 8575 states and 11876 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:18,651 INFO L93 Difference]: Finished difference Result 10751 states and 14913 transitions. [2023-11-19 08:03:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2023-11-19 08:03:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:18,670 INFO L225 Difference]: With dead ends: 10751 [2023-11-19 08:03:18,670 INFO L226 Difference]: Without dead ends: 8530 [2023-11-19 08:03:18,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:18,676 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 83 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:18,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 480 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8530 states. [2023-11-19 08:03:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8530 to 6140. [2023-11-19 08:03:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6140 states, 6139 states have (on average 1.3924091871640332) internal successors, (8548), 6139 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6140 states to 6140 states and 8548 transitions. [2023-11-19 08:03:18,919 INFO L78 Accepts]: Start accepts. Automaton has 6140 states and 8548 transitions. Word has length 355 [2023-11-19 08:03:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:18,920 INFO L495 AbstractCegarLoop]: Abstraction has 6140 states and 8548 transitions. [2023-11-19 08:03:18,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6140 states and 8548 transitions. [2023-11-19 08:03:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-11-19 08:03:18,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:18,939 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:18,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 08:03:19,160 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:19,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1965226690, now seen corresponding path program 1 times [2023-11-19 08:03:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538282357] [2023-11-19 08:03:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1251 proven. 26 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-11-19 08:03:19,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:19,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538282357] [2023-11-19 08:03:19,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538282357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:19,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581080770] [2023-11-19 08:03:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:19,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:19,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:19,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:19,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:03:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:19,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:03:19,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1251 proven. 26 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-11-19 08:03:19,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1251 proven. 26 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-11-19 08:03:19,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581080770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:19,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:19,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-19 08:03:19,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397923214] [2023-11-19 08:03:19,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:19,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:03:19,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:19,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:03:19,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:03:19,824 INFO L87 Difference]: Start difference. First operand 6140 states and 8548 transitions. Second operand has 6 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:20,529 INFO L93 Difference]: Finished difference Result 13848 states and 19249 transitions. [2023-11-19 08:03:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:03:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 417 [2023-11-19 08:03:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:20,548 INFO L225 Difference]: With dead ends: 13848 [2023-11-19 08:03:20,549 INFO L226 Difference]: Without dead ends: 7414 [2023-11-19 08:03:20,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 834 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:03:20,559 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 286 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:20,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 539 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:03:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2023-11-19 08:03:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 6032. [2023-11-19 08:03:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6032 states, 6031 states have (on average 1.3669374896368762) internal successors, (8244), 6031 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6032 states to 6032 states and 8244 transitions. [2023-11-19 08:03:20,756 INFO L78 Accepts]: Start accepts. Automaton has 6032 states and 8244 transitions. Word has length 417 [2023-11-19 08:03:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:20,757 INFO L495 AbstractCegarLoop]: Abstraction has 6032 states and 8244 transitions. [2023-11-19 08:03:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 6032 states and 8244 transitions. [2023-11-19 08:03:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-19 08:03:20,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:20,778 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 16, 16, 16, 14, 14, 12, 12, 10, 10, 8, 8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:20,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:20,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 08:03:20,994 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:20,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1529804208, now seen corresponding path program 1 times [2023-11-19 08:03:20,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780572219] [2023-11-19 08:03:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 1660 proven. 77 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2023-11-19 08:03:21,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:21,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780572219] [2023-11-19 08:03:21,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780572219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:21,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540767486] [2023-11-19 08:03:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:21,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:21,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:21,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:03:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:21,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:03:21,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 1671 proven. 0 refuted. 0 times theorem prover too weak. 1467 trivial. 0 not checked. [2023-11-19 08:03:21,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:21,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540767486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:21,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:21,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 08:03:21,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8098743] [2023-11-19 08:03:21,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:21,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:21,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:21,778 INFO L87 Difference]: Start difference. First operand 6032 states and 8244 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:22,045 INFO L93 Difference]: Finished difference Result 12486 states and 17159 transitions. [2023-11-19 08:03:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:22,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 509 [2023-11-19 08:03:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:22,059 INFO L225 Difference]: With dead ends: 12486 [2023-11-19 08:03:22,060 INFO L226 Difference]: Without dead ends: 6462 [2023-11-19 08:03:22,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:22,068 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 92 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:22,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 216 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2023-11-19 08:03:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 6266. [2023-11-19 08:03:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6266 states, 6265 states have (on average 1.3661612130885874) internal successors, (8559), 6265 states have internal predecessors, (8559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6266 states to 6266 states and 8559 transitions. [2023-11-19 08:03:22,290 INFO L78 Accepts]: Start accepts. Automaton has 6266 states and 8559 transitions. Word has length 509 [2023-11-19 08:03:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:22,291 INFO L495 AbstractCegarLoop]: Abstraction has 6266 states and 8559 transitions. [2023-11-19 08:03:22,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6266 states and 8559 transitions. [2023-11-19 08:03:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-19 08:03:22,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:22,315 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 16, 14, 14, 12, 12, 10, 10, 8, 8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:22,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:22,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:22,538 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:22,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1911316890, now seen corresponding path program 1 times [2023-11-19 08:03:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:22,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074121716] [2023-11-19 08:03:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3204 backedges. 1744 proven. 206 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2023-11-19 08:03:23,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:23,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074121716] [2023-11-19 08:03:23,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074121716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:23,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191833695] [2023-11-19 08:03:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:23,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:23,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:23,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:23,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:03:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:23,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:03:23,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3204 backedges. 1792 proven. 239 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2023-11-19 08:03:24,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3204 backedges. 1887 proven. 144 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2023-11-19 08:03:26,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191833695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:26,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:26,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 08:03:26,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337978779] [2023-11-19 08:03:26,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:03:26,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:03:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:03:26,357 INFO L87 Difference]: Start difference. First operand 6266 states and 8559 transitions. Second operand has 11 states, 11 states have (on average 38.0) internal successors, (418), 11 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:29,958 INFO L93 Difference]: Finished difference Result 26866 states and 36740 transitions. [2023-11-19 08:03:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:03:29,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 38.0) internal successors, (418), 11 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2023-11-19 08:03:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:30,007 INFO L225 Difference]: With dead ends: 26866 [2023-11-19 08:03:30,008 INFO L226 Difference]: Without dead ends: 19739 [2023-11-19 08:03:30,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 1033 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:03:30,025 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 1143 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:30,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 1612 Invalid, 2238 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [221 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 08:03:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19739 states. [2023-11-19 08:03:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19739 to 18645. [2023-11-19 08:03:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18645 states, 18644 states have (on average 1.3174747908174211) internal successors, (24563), 18644 states have internal predecessors, (24563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18645 states to 18645 states and 24563 transitions. [2023-11-19 08:03:30,787 INFO L78 Accepts]: Start accepts. Automaton has 18645 states and 24563 transitions. Word has length 513 [2023-11-19 08:03:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:30,788 INFO L495 AbstractCegarLoop]: Abstraction has 18645 states and 24563 transitions. [2023-11-19 08:03:30,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.0) internal successors, (418), 11 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18645 states and 24563 transitions. [2023-11-19 08:03:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2023-11-19 08:03:30,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:30,852 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:30,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:31,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:31,068 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:31,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash 944376353, now seen corresponding path program 2 times [2023-11-19 08:03:31,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:31,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848636337] [2023-11-19 08:03:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:31,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4078 backedges. 1321 proven. 16 refuted. 0 times theorem prover too weak. 2741 trivial. 0 not checked. [2023-11-19 08:03:31,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:31,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848636337] [2023-11-19 08:03:31,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848636337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:31,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571407907] [2023-11-19 08:03:31,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:03:31,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:31,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:31,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:03:31,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:03:31,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:31,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:03:31,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4078 backedges. 1321 proven. 16 refuted. 0 times theorem prover too weak. 2741 trivial. 0 not checked. [2023-11-19 08:03:31,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4078 backedges. 1321 proven. 16 refuted. 0 times theorem prover too weak. 2741 trivial. 0 not checked. [2023-11-19 08:03:31,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571407907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:31,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:31,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-19 08:03:31,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986692118] [2023-11-19 08:03:31,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:31,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:03:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:03:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:03:31,909 INFO L87 Difference]: Start difference. First operand 18645 states and 24563 transitions. Second operand has 8 states, 8 states have (on average 34.25) internal successors, (274), 8 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:32,898 INFO L93 Difference]: Finished difference Result 28966 states and 37845 transitions. [2023-11-19 08:03:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:03:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 34.25) internal successors, (274), 8 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 583 [2023-11-19 08:03:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:32,900 INFO L225 Difference]: With dead ends: 28966 [2023-11-19 08:03:32,900 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 08:03:32,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:03:32,925 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 239 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:32,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1019 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:03:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 08:03:32,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 08:03:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 08:03:32,927 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 583 [2023-11-19 08:03:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:32,927 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 08:03:32,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.25) internal successors, (274), 8 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 08:03:32,928 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 08:03:32,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 08:03:32,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e9f4f55-1398-4431-b75e-f5c4931e18d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:33,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-19 08:03:53,512 WARN L293 SmtUtils]: Spent 20.34s on a formula simplification. DAG size of input: 770 DAG size of output: 595 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)