./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --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 f3536db9699385ffb876a2d41b01ddec88a6e92c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:24:04,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:24:04,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:24:04,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:24:04,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:24:04,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:24:04,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:24:04,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:24:04,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:24:04,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:24:04,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:24:04,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:24:04,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:24:04,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:24:04,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:24:04,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:24:04,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:24:04,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:24:04,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:24:04,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:24:04,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:24:04,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:24:04,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:24:04,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:24:04,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:24:04,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:24:04,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:24:04,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:24:04,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:24:04,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:24:04,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:24:04,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:24:04,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:24:04,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:24:04,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:24:04,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:24:04,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:24:04,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:24:04,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:24:04,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:24:04,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:24:04,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:24:04,425 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:24:04,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:24:04,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:24:04,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:24:04,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:24:04,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:24:04,429 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:24:04,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:24:04,429 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:24:04,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:24:04,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:24:04,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:24:04,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:24:04,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:24:04,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:24:04,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:24:04,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:24:04,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:24:04,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:24:04,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:24:04,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:24:04,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:24:04,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:04,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:24:04,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:24:04,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:24:04,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:24:04,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:24:04,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:24:04,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:24:04,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:24:04,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:24:04,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3536db9699385ffb876a2d41b01ddec88a6e92c [2021-10-15 20:24:04,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:24:04,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:24:04,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:24:04,712 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:24:04,713 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:24:04,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2021-10-15 20:24:04,790 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/data/54f20e54e/a0063d8d20144f26b1170ac731315ab8/FLAGe2cecb1b5 [2021-10-15 20:24:05,340 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:24:05,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2021-10-15 20:24:05,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/data/54f20e54e/a0063d8d20144f26b1170ac731315ab8/FLAGe2cecb1b5 [2021-10-15 20:24:05,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/data/54f20e54e/a0063d8d20144f26b1170ac731315ab8 [2021-10-15 20:24:05,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:24:05,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:24:05,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:05,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:24:05,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:24:05,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:05" (1/1) ... [2021-10-15 20:24:05,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ebb03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:05, skipping insertion in model container [2021-10-15 20:24:05,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:05" (1/1) ... [2021-10-15 20:24:05,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:24:05,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:24:05,991 WARN L228 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_cc527fa5-fad6-4b80-8380-22bc37a05826/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c[45163,45176] [2021-10-15 20:24:05,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:06,008 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:24:06,075 WARN L228 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_cc527fa5-fad6-4b80-8380-22bc37a05826/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c[45163,45176] [2021-10-15 20:24:06,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:06,096 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:24:06,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06 WrapperNode [2021-10-15 20:24:06,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:06,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:06,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:24:06,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:24:06,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:06,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:24:06,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:24:06,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:24:06,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:24:06,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:24:06,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:24:06,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:24:06,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (1/1) ... [2021-10-15 20:24:06,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:24:06,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:24:06,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:24:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:24:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:24:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:24:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:24:06,509 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-15 20:24:07,063 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-15 20:24:07,063 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-15 20:24:07,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:24:07,081 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:24:07,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:07 BoogieIcfgContainer [2021-10-15 20:24:07,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:24:07,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:24:07,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:24:07,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:24:07,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:24:05" (1/3) ... [2021-10-15 20:24:07,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a24c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:07, skipping insertion in model container [2021-10-15 20:24:07,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:06" (2/3) ... [2021-10-15 20:24:07,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a24c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:07, skipping insertion in model container [2021-10-15 20:24:07,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:07" (3/3) ... [2021-10-15 20:24:07,094 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2021-10-15 20:24:07,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:24:07,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:24:07,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:24:07,155 INFO L339 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, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:24:07,155 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:24:07,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 260 transitions, 520 flow [2021-10-15 20:24:07,256 INFO L129 PetriNetUnfolder]: 110/260 cut-off events. [2021-10-15 20:24:07,256 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:07,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 260 events. 110/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 512 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-10-15 20:24:07,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 260 transitions, 520 flow [2021-10-15 20:24:07,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 216 transitions, 432 flow [2021-10-15 20:24:07,302 INFO L129 PetriNetUnfolder]: 30/87 cut-off events. [2021-10-15 20:24:07,303 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:07,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:07,304 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:07,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1180429726, now seen corresponding path program 1 times [2021-10-15 20:24:07,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:07,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569684132] [2021-10-15 20:24:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:07,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:07,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:07,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569684132] [2021-10-15 20:24:07,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569684132] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:07,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:07,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:07,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620959616] [2021-10-15 20:24:07,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:07,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:07,614 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:07,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 216 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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) [2021-10-15 20:24:07,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:07,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:07,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:07,911 INFO L129 PetriNetUnfolder]: 92/252 cut-off events. [2021-10-15 20:24:07,913 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:07,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 252 events. 92/252 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 592 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 20. Up to 102 conditions per place. [2021-10-15 20:24:07,922 INFO L132 encePairwiseOnDemand]: 248/260 looper letters, 103 selfloop transitions, 11 changer transitions 0/233 dead transitions. [2021-10-15 20:24:07,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 233 transitions, 694 flow [2021-10-15 20:24:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2021-10-15 20:24:07,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7512820512820513 [2021-10-15 20:24:07,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2021-10-15 20:24:07,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2021-10-15 20:24:07,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:07,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2021-10-15 20:24:07,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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) [2021-10-15 20:24:07,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:07,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:07,978 INFO L186 Difference]: Start difference. First operand has 138 places, 216 transitions, 432 flow. Second operand 3 states and 586 transitions. [2021-10-15 20:24:07,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 233 transitions, 694 flow [2021-10-15 20:24:07,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 233 transitions, 694 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:07,991 INFO L242 Difference]: Finished difference. Result has 142 places, 224 transitions, 510 flow [2021-10-15 20:24:07,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=510, PETRI_PLACES=142, PETRI_TRANSITIONS=224} [2021-10-15 20:24:07,994 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 4 predicate places. [2021-10-15 20:24:07,994 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 224 transitions, 510 flow [2021-10-15 20:24:07,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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) [2021-10-15 20:24:07,995 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:07,996 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:07,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:24:07,997 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1518860370, now seen corresponding path program 1 times [2021-10-15 20:24:07,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:07,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137692529] [2021-10-15 20:24:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:07,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:08,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:08,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137692529] [2021-10-15 20:24:08,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137692529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:08,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:08,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:08,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629246263] [2021-10-15 20:24:08,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:08,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:08,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:08,113 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:08,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 224 transitions, 510 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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) [2021-10-15 20:24:08,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:08,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:08,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:08,339 INFO L129 PetriNetUnfolder]: 101/286 cut-off events. [2021-10-15 20:24:08,339 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-10-15 20:24:08,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 286 events. 101/286 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 680 event pairs, 0 based on Foata normal form. 3/204 useless extension candidates. Maximal degree in co-relation 308. Up to 114 conditions per place. [2021-10-15 20:24:08,346 INFO L132 encePairwiseOnDemand]: 253/260 looper letters, 105 selfloop transitions, 6 changer transitions 0/230 dead transitions. [2021-10-15 20:24:08,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 230 transitions, 746 flow [2021-10-15 20:24:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2021-10-15 20:24:08,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7397435897435898 [2021-10-15 20:24:08,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2021-10-15 20:24:08,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2021-10-15 20:24:08,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:08,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2021-10-15 20:24:08,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 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) [2021-10-15 20:24:08,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:08,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:08,364 INFO L186 Difference]: Start difference. First operand has 142 places, 224 transitions, 510 flow. Second operand 3 states and 577 transitions. [2021-10-15 20:24:08,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 230 transitions, 746 flow [2021-10-15 20:24:08,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 230 transitions, 722 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:08,395 INFO L242 Difference]: Finished difference. Result has 144 places, 226 transitions, 524 flow [2021-10-15 20:24:08,395 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=524, PETRI_PLACES=144, PETRI_TRANSITIONS=226} [2021-10-15 20:24:08,396 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 6 predicate places. [2021-10-15 20:24:08,396 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 226 transitions, 524 flow [2021-10-15 20:24:08,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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) [2021-10-15 20:24:08,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:08,397 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:08,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:24:08,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:08,404 INFO L82 PathProgramCache]: Analyzing trace with hash -945010985, now seen corresponding path program 1 times [2021-10-15 20:24:08,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:08,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098460035] [2021-10-15 20:24:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:08,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:08,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:08,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098460035] [2021-10-15 20:24:08,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098460035] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:08,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:08,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:08,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762960551] [2021-10-15 20:24:08,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:08,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:08,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:08,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 226 transitions, 524 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2021-10-15 20:24:08,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:08,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:08,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:08,786 INFO L129 PetriNetUnfolder]: 106/297 cut-off events. [2021-10-15 20:24:08,786 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-10-15 20:24:08,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 297 events. 106/297 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 717 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 304. Up to 119 conditions per place. [2021-10-15 20:24:08,789 INFO L132 encePairwiseOnDemand]: 248/260 looper letters, 111 selfloop transitions, 11 changer transitions 0/241 dead transitions. [2021-10-15 20:24:08,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 241 transitions, 810 flow [2021-10-15 20:24:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2021-10-15 20:24:08,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7525641025641026 [2021-10-15 20:24:08,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2021-10-15 20:24:08,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2021-10-15 20:24:08,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:08,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2021-10-15 20:24:08,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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) [2021-10-15 20:24:08,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:08,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:08,799 INFO L186 Difference]: Start difference. First operand has 144 places, 226 transitions, 524 flow. Second operand 3 states and 587 transitions. [2021-10-15 20:24:08,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 241 transitions, 810 flow [2021-10-15 20:24:08,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 241 transitions, 798 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:08,808 INFO L242 Difference]: Finished difference. Result has 146 places, 232 transitions, 592 flow [2021-10-15 20:24:08,809 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=146, PETRI_TRANSITIONS=232} [2021-10-15 20:24:08,809 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 8 predicate places. [2021-10-15 20:24:08,809 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 232 transitions, 592 flow [2021-10-15 20:24:08,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2021-10-15 20:24:08,810 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:08,810 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:08,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:24:08,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:08,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1648361961, now seen corresponding path program 1 times [2021-10-15 20:24:08,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:08,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030572843] [2021-10-15 20:24:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:08,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:08,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:08,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030572843] [2021-10-15 20:24:08,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030572843] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:08,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:08,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:08,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059426817] [2021-10-15 20:24:08,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:08,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:08,875 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:08,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 232 transitions, 592 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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) [2021-10-15 20:24:08,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:08,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:08,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:09,019 INFO L129 PetriNetUnfolder]: 106/298 cut-off events. [2021-10-15 20:24:09,019 INFO L130 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2021-10-15 20:24:09,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 298 events. 106/298 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 719 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 301. Up to 119 conditions per place. [2021-10-15 20:24:09,022 INFO L132 encePairwiseOnDemand]: 247/260 looper letters, 111 selfloop transitions, 12 changer transitions 0/242 dead transitions. [2021-10-15 20:24:09,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 242 transitions, 860 flow [2021-10-15 20:24:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2021-10-15 20:24:09,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7525641025641026 [2021-10-15 20:24:09,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2021-10-15 20:24:09,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2021-10-15 20:24:09,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:09,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2021-10-15 20:24:09,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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) [2021-10-15 20:24:09,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,033 INFO L186 Difference]: Start difference. First operand has 146 places, 232 transitions, 592 flow. Second operand 3 states and 587 transitions. [2021-10-15 20:24:09,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 242 transitions, 860 flow [2021-10-15 20:24:09,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 242 transitions, 838 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:09,046 INFO L242 Difference]: Finished difference. Result has 148 places, 233 transitions, 624 flow [2021-10-15 20:24:09,047 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=624, PETRI_PLACES=148, PETRI_TRANSITIONS=233} [2021-10-15 20:24:09,047 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 10 predicate places. [2021-10-15 20:24:09,047 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 233 transitions, 624 flow [2021-10-15 20:24:09,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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) [2021-10-15 20:24:09,048 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:09,048 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:09,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:24:09,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash -322299688, now seen corresponding path program 1 times [2021-10-15 20:24:09,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:09,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066789518] [2021-10-15 20:24:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:09,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:09,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:09,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066789518] [2021-10-15 20:24:09,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066789518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:09,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:09,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:09,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710190745] [2021-10-15 20:24:09,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:09,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:09,142 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:09,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 233 transitions, 624 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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) [2021-10-15 20:24:09,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:09,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:09,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:09,292 INFO L129 PetriNetUnfolder]: 106/308 cut-off events. [2021-10-15 20:24:09,292 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2021-10-15 20:24:09,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 308 events. 106/308 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 792 event pairs, 0 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 299. Up to 124 conditions per place. [2021-10-15 20:24:09,295 INFO L132 encePairwiseOnDemand]: 253/260 looper letters, 113 selfloop transitions, 6 changer transitions 0/238 dead transitions. [2021-10-15 20:24:09,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 238 transitions, 868 flow [2021-10-15 20:24:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2021-10-15 20:24:09,299 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7410256410256411 [2021-10-15 20:24:09,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2021-10-15 20:24:09,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2021-10-15 20:24:09,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:09,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2021-10-15 20:24:09,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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) [2021-10-15 20:24:09,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,306 INFO L186 Difference]: Start difference. First operand has 148 places, 233 transitions, 624 flow. Second operand 3 states and 578 transitions. [2021-10-15 20:24:09,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 238 transitions, 868 flow [2021-10-15 20:24:09,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 238 transitions, 844 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:09,317 INFO L242 Difference]: Finished difference. Result has 149 places, 233 transitions, 616 flow [2021-10-15 20:24:09,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=616, PETRI_PLACES=149, PETRI_TRANSITIONS=233} [2021-10-15 20:24:09,318 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 11 predicate places. [2021-10-15 20:24:09,318 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 233 transitions, 616 flow [2021-10-15 20:24:09,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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) [2021-10-15 20:24:09,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:09,319 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:09,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:24:09,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:09,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1640212753, now seen corresponding path program 1 times [2021-10-15 20:24:09,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:09,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480410177] [2021-10-15 20:24:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:09,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:09,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:09,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480410177] [2021-10-15 20:24:09,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480410177] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:09,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:09,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:09,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246352661] [2021-10-15 20:24:09,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:09,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:09,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:09,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 233 transitions, 616 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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) [2021-10-15 20:24:09,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:09,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:09,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:09,558 INFO L129 PetriNetUnfolder]: 106/318 cut-off events. [2021-10-15 20:24:09,559 INFO L130 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2021-10-15 20:24:09,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 318 events. 106/318 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 867 event pairs, 0 based on Foata normal form. 2/232 useless extension candidates. Maximal degree in co-relation 298. Up to 123 conditions per place. [2021-10-15 20:24:09,565 INFO L132 encePairwiseOnDemand]: 252/260 looper letters, 112 selfloop transitions, 7 changer transitions 0/238 dead transitions. [2021-10-15 20:24:09,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 238 transitions, 862 flow [2021-10-15 20:24:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2021-10-15 20:24:09,568 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423076923076923 [2021-10-15 20:24:09,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2021-10-15 20:24:09,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2021-10-15 20:24:09,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:09,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2021-10-15 20:24:09,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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) [2021-10-15 20:24:09,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,575 INFO L186 Difference]: Start difference. First operand has 149 places, 233 transitions, 616 flow. Second operand 3 states and 579 transitions. [2021-10-15 20:24:09,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 238 transitions, 862 flow [2021-10-15 20:24:09,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 238 transitions, 856 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:09,584 INFO L242 Difference]: Finished difference. Result has 151 places, 233 transitions, 631 flow [2021-10-15 20:24:09,585 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=631, PETRI_PLACES=151, PETRI_TRANSITIONS=233} [2021-10-15 20:24:09,585 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 13 predicate places. [2021-10-15 20:24:09,585 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 233 transitions, 631 flow [2021-10-15 20:24:09,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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) [2021-10-15 20:24:09,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:09,587 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:09,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:24:09,587 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:09,588 INFO L82 PathProgramCache]: Analyzing trace with hash 96844374, now seen corresponding path program 1 times [2021-10-15 20:24:09,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:09,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027877497] [2021-10-15 20:24:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:09,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:09,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:09,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027877497] [2021-10-15 20:24:09,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027877497] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:09,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:09,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:09,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691175309] [2021-10-15 20:24:09,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:09,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:09,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:09,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:09,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 260 [2021-10-15 20:24:09,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 233 transitions, 631 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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) [2021-10-15 20:24:09,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:09,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 260 [2021-10-15 20:24:09,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:09,755 INFO L129 PetriNetUnfolder]: 196/612 cut-off events. [2021-10-15 20:24:09,755 INFO L130 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2021-10-15 20:24:09,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 612 events. 196/612 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2202 event pairs, 0 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 439. Up to 47 conditions per place. [2021-10-15 20:24:09,760 INFO L132 encePairwiseOnDemand]: 247/260 looper letters, 32 selfloop transitions, 2 changer transitions 0/244 dead transitions. [2021-10-15 20:24:09,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 244 transitions, 721 flow [2021-10-15 20:24:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2021-10-15 20:24:09,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9576923076923077 [2021-10-15 20:24:09,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2021-10-15 20:24:09,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2021-10-15 20:24:09,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:09,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2021-10-15 20:24:09,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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) [2021-10-15 20:24:09,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,771 INFO L186 Difference]: Start difference. First operand has 151 places, 233 transitions, 631 flow. Second operand 3 states and 747 transitions. [2021-10-15 20:24:09,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 244 transitions, 721 flow [2021-10-15 20:24:09,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 244 transitions, 714 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:09,779 INFO L242 Difference]: Finished difference. Result has 153 places, 234 transitions, 656 flow [2021-10-15 20:24:09,780 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=656, PETRI_PLACES=153, PETRI_TRANSITIONS=234} [2021-10-15 20:24:09,780 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 15 predicate places. [2021-10-15 20:24:09,780 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 234 transitions, 656 flow [2021-10-15 20:24:09,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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) [2021-10-15 20:24:09,781 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:09,781 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:09,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:24:09,782 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:09,783 INFO L82 PathProgramCache]: Analyzing trace with hash -583213996, now seen corresponding path program 1 times [2021-10-15 20:24:09,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:09,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174528151] [2021-10-15 20:24:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:09,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:09,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:09,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174528151] [2021-10-15 20:24:09,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174528151] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:09,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:09,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:09,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809817085] [2021-10-15 20:24:09,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:09,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:09,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:09,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 260 [2021-10-15 20:24:09,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 234 transitions, 656 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 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) [2021-10-15 20:24:09,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:09,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 260 [2021-10-15 20:24:09,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:09,956 INFO L129 PetriNetUnfolder]: 368/1166 cut-off events. [2021-10-15 20:24:09,957 INFO L130 PetriNetUnfolder]: For 292/292 co-relation queries the response was YES. [2021-10-15 20:24:09,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 1166 events. 368/1166 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5770 event pairs, 0 based on Foata normal form. 0/870 useless extension candidates. Maximal degree in co-relation 733. Up to 94 conditions per place. [2021-10-15 20:24:09,963 INFO L132 encePairwiseOnDemand]: 257/260 looper letters, 4 selfloop transitions, 2 changer transitions 0/235 dead transitions. [2021-10-15 20:24:09,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 235 transitions, 670 flow [2021-10-15 20:24:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2021-10-15 20:24:09,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9782051282051282 [2021-10-15 20:24:09,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2021-10-15 20:24:09,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2021-10-15 20:24:09,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:09,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2021-10-15 20:24:09,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 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) [2021-10-15 20:24:09,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:09,974 INFO L186 Difference]: Start difference. First operand has 153 places, 234 transitions, 656 flow. Second operand 3 states and 763 transitions. [2021-10-15 20:24:09,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 235 transitions, 670 flow [2021-10-15 20:24:09,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 235 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:09,982 INFO L242 Difference]: Finished difference. Result has 156 places, 235 transitions, 668 flow [2021-10-15 20:24:09,982 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=668, PETRI_PLACES=156, PETRI_TRANSITIONS=235} [2021-10-15 20:24:09,983 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 18 predicate places. [2021-10-15 20:24:09,983 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 235 transitions, 668 flow [2021-10-15 20:24:09,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 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) [2021-10-15 20:24:09,984 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:09,984 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:24:09,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:24:09,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1263978570, now seen corresponding path program 1 times [2021-10-15 20:24:09,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:09,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937748103] [2021-10-15 20:24:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:09,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:10,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:10,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937748103] [2021-10-15 20:24:10,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937748103] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:10,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:10,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:24:10,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434763335] [2021-10-15 20:24:10,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:24:10,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:24:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:24:10,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 260 [2021-10-15 20:24:10,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 235 transitions, 668 flow. Second operand has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 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) [2021-10-15 20:24:10,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:10,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 260 [2021-10-15 20:24:10,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:10,490 INFO L129 PetriNetUnfolder]: 742/2356 cut-off events. [2021-10-15 20:24:10,491 INFO L130 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2021-10-15 20:24:10,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4038 conditions, 2356 events. 742/2356 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 14932 event pairs, 0 based on Foata normal form. 0/1796 useless extension candidates. Maximal degree in co-relation 2085. Up to 521 conditions per place. [2021-10-15 20:24:10,505 INFO L132 encePairwiseOnDemand]: 237/260 looper letters, 210 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2021-10-15 20:24:10,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 360 transitions, 1538 flow [2021-10-15 20:24:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:24:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:24:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 988 transitions. [2021-10-15 20:24:10,509 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-10-15 20:24:10,509 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 988 transitions. [2021-10-15 20:24:10,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 988 transitions. [2021-10-15 20:24:10,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:10,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 988 transitions. [2021-10-15 20:24:10,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 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) [2021-10-15 20:24:10,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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) [2021-10-15 20:24:10,518 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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) [2021-10-15 20:24:10,518 INFO L186 Difference]: Start difference. First operand has 156 places, 235 transitions, 668 flow. Second operand 5 states and 988 transitions. [2021-10-15 20:24:10,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 360 transitions, 1538 flow [2021-10-15 20:24:10,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 360 transitions, 1536 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:10,529 INFO L242 Difference]: Finished difference. Result has 163 places, 262 transitions, 980 flow [2021-10-15 20:24:10,530 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=980, PETRI_PLACES=163, PETRI_TRANSITIONS=262} [2021-10-15 20:24:10,530 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 25 predicate places. [2021-10-15 20:24:10,530 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 262 transitions, 980 flow [2021-10-15 20:24:10,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 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) [2021-10-15 20:24:10,531 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:10,531 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:10,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:24:10,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1714449803, now seen corresponding path program 1 times [2021-10-15 20:24:10,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:10,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538053549] [2021-10-15 20:24:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:10,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:10,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:10,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538053549] [2021-10-15 20:24:10,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538053549] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:10,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:10,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:10,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015431295] [2021-10-15 20:24:10,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:10,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:10,567 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 260 [2021-10-15 20:24:10,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 262 transitions, 980 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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) [2021-10-15 20:24:10,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:10,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 260 [2021-10-15 20:24:10,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:10,775 INFO L129 PetriNetUnfolder]: 714/2328 cut-off events. [2021-10-15 20:24:10,776 INFO L130 PetriNetUnfolder]: For 1148/1148 co-relation queries the response was YES. [2021-10-15 20:24:10,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3436 conditions, 2328 events. 714/2328 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 14861 event pairs, 0 based on Foata normal form. 0/1821 useless extension candidates. Maximal degree in co-relation 1578. Up to 188 conditions per place. [2021-10-15 20:24:10,790 INFO L132 encePairwiseOnDemand]: 258/260 looper letters, 1 selfloop transitions, 1 changer transitions 0/261 dead transitions. [2021-10-15 20:24:10,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 261 transitions, 982 flow [2021-10-15 20:24:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2021-10-15 20:24:10,794 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9807692307692307 [2021-10-15 20:24:10,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2021-10-15 20:24:10,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2021-10-15 20:24:10,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:10,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2021-10-15 20:24:10,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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) [2021-10-15 20:24:10,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:10,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:10,802 INFO L186 Difference]: Start difference. First operand has 163 places, 262 transitions, 980 flow. Second operand 3 states and 765 transitions. [2021-10-15 20:24:10,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 261 transitions, 982 flow [2021-10-15 20:24:10,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 261 transitions, 982 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:10,816 INFO L242 Difference]: Finished difference. Result has 165 places, 261 transitions, 980 flow [2021-10-15 20:24:10,816 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=980, PETRI_PLACES=165, PETRI_TRANSITIONS=261} [2021-10-15 20:24:10,817 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 27 predicate places. [2021-10-15 20:24:10,817 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 261 transitions, 980 flow [2021-10-15 20:24:10,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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) [2021-10-15 20:24:10,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:10,818 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:10,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:24:10,819 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1870560393, now seen corresponding path program 1 times [2021-10-15 20:24:10,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:10,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670228914] [2021-10-15 20:24:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:10,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:10,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:10,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670228914] [2021-10-15 20:24:10,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670228914] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:10,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:10,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:10,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677548339] [2021-10-15 20:24:10,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:10,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:10,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 260 [2021-10-15 20:24:10,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 261 transitions, 980 flow. Second operand has 3 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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) [2021-10-15 20:24:10,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:10,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 260 [2021-10-15 20:24:10,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:11,077 INFO L129 PetriNetUnfolder]: 694/2348 cut-off events. [2021-10-15 20:24:11,078 INFO L130 PetriNetUnfolder]: For 1158/1158 co-relation queries the response was YES. [2021-10-15 20:24:11,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3570 conditions, 2348 events. 694/2348 cut-off events. For 1158/1158 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 14821 event pairs, 0 based on Foata normal form. 0/1917 useless extension candidates. Maximal degree in co-relation 3542. Up to 204 conditions per place. [2021-10-15 20:24:11,094 INFO L132 encePairwiseOnDemand]: 249/260 looper letters, 3 selfloop transitions, 10 changer transitions 0/263 dead transitions. [2021-10-15 20:24:11,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 263 transitions, 1010 flow [2021-10-15 20:24:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2021-10-15 20:24:11,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9641025641025641 [2021-10-15 20:24:11,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2021-10-15 20:24:11,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2021-10-15 20:24:11,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:11,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2021-10-15 20:24:11,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2021-10-15 20:24:11,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:11,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:11,105 INFO L186 Difference]: Start difference. First operand has 165 places, 261 transitions, 980 flow. Second operand 3 states and 752 transitions. [2021-10-15 20:24:11,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 263 transitions, 1010 flow [2021-10-15 20:24:11,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 263 transitions, 1009 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:11,118 INFO L242 Difference]: Finished difference. Result has 168 places, 263 transitions, 1029 flow [2021-10-15 20:24:11,119 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1029, PETRI_PLACES=168, PETRI_TRANSITIONS=263} [2021-10-15 20:24:11,119 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 30 predicate places. [2021-10-15 20:24:11,119 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 263 transitions, 1029 flow [2021-10-15 20:24:11,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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) [2021-10-15 20:24:11,120 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:11,120 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:11,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:24:11,121 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash -201464677, now seen corresponding path program 1 times [2021-10-15 20:24:11,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:11,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464739856] [2021-10-15 20:24:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:11,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:11,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:11,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464739856] [2021-10-15 20:24:11,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464739856] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:11,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:11,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:11,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311058802] [2021-10-15 20:24:11,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:11,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:11,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:11,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:11,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 260 [2021-10-15 20:24:11,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 263 transitions, 1029 flow. Second operand has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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) [2021-10-15 20:24:11,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:11,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 260 [2021-10-15 20:24:11,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:11,564 INFO L129 PetriNetUnfolder]: 1353/4593 cut-off events. [2021-10-15 20:24:11,564 INFO L130 PetriNetUnfolder]: For 2369/2369 co-relation queries the response was YES. [2021-10-15 20:24:11,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7133 conditions, 4593 events. 1353/4593 cut-off events. For 2369/2369 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 35772 event pairs, 0 based on Foata normal form. 0/3774 useless extension candidates. Maximal degree in co-relation 7102. Up to 408 conditions per place. [2021-10-15 20:24:11,663 INFO L132 encePairwiseOnDemand]: 257/260 looper letters, 4 selfloop transitions, 2 changer transitions 0/264 dead transitions. [2021-10-15 20:24:11,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 264 transitions, 1043 flow [2021-10-15 20:24:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2021-10-15 20:24:11,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9782051282051282 [2021-10-15 20:24:11,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2021-10-15 20:24:11,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2021-10-15 20:24:11,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:11,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2021-10-15 20:24:11,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 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) [2021-10-15 20:24:11,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:11,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:11,672 INFO L186 Difference]: Start difference. First operand has 168 places, 263 transitions, 1029 flow. Second operand 3 states and 763 transitions. [2021-10-15 20:24:11,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 264 transitions, 1043 flow [2021-10-15 20:24:11,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 264 transitions, 1023 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:11,695 INFO L242 Difference]: Finished difference. Result has 170 places, 264 transitions, 1023 flow [2021-10-15 20:24:11,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1023, PETRI_PLACES=170, PETRI_TRANSITIONS=264} [2021-10-15 20:24:11,696 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 32 predicate places. [2021-10-15 20:24:11,696 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 264 transitions, 1023 flow [2021-10-15 20:24:11,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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) [2021-10-15 20:24:11,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:11,697 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:11,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 20:24:11,697 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:11,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:11,699 INFO L82 PathProgramCache]: Analyzing trace with hash 692021661, now seen corresponding path program 1 times [2021-10-15 20:24:11,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:11,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204512750] [2021-10-15 20:24:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:11,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:11,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:11,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204512750] [2021-10-15 20:24:11,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204512750] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:11,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:11,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:11,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502762235] [2021-10-15 20:24:11,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:11,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:11,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:11,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:11,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 264 transitions, 1023 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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) [2021-10-15 20:24:11,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:11,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:11,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:12,590 INFO L129 PetriNetUnfolder]: 1695/5659 cut-off events. [2021-10-15 20:24:12,590 INFO L130 PetriNetUnfolder]: For 3142/3142 co-relation queries the response was YES. [2021-10-15 20:24:12,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11069 conditions, 5659 events. 1695/5659 cut-off events. For 3142/3142 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 42711 event pairs, 0 based on Foata normal form. 48/4595 useless extension candidates. Maximal degree in co-relation 11038. Up to 1485 conditions per place. [2021-10-15 20:24:12,631 INFO L132 encePairwiseOnDemand]: 221/260 looper letters, 162 selfloop transitions, 44 changer transitions 0/331 dead transitions. [2021-10-15 20:24:12,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 331 transitions, 1623 flow [2021-10-15 20:24:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2021-10-15 20:24:12,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8153846153846154 [2021-10-15 20:24:12,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2021-10-15 20:24:12,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2021-10-15 20:24:12,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:12,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2021-10-15 20:24:12,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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) [2021-10-15 20:24:12,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:12,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:12,641 INFO L186 Difference]: Start difference. First operand has 170 places, 264 transitions, 1023 flow. Second operand 3 states and 636 transitions. [2021-10-15 20:24:12,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 331 transitions, 1623 flow [2021-10-15 20:24:12,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 331 transitions, 1621 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:12,665 INFO L242 Difference]: Finished difference. Result has 173 places, 288 transitions, 1321 flow [2021-10-15 20:24:12,666 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1321, PETRI_PLACES=173, PETRI_TRANSITIONS=288} [2021-10-15 20:24:12,666 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 35 predicate places. [2021-10-15 20:24:12,667 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 288 transitions, 1321 flow [2021-10-15 20:24:12,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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) [2021-10-15 20:24:12,667 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:12,668 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:12,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:24:12,668 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash 391062682, now seen corresponding path program 1 times [2021-10-15 20:24:12,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:12,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698794031] [2021-10-15 20:24:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:12,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:12,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:12,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698794031] [2021-10-15 20:24:12,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698794031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:12,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:12,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:12,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109620153] [2021-10-15 20:24:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:12,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:12,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 260 [2021-10-15 20:24:12,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 288 transitions, 1321 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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) [2021-10-15 20:24:12,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:12,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 260 [2021-10-15 20:24:12,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:13,839 INFO L129 PetriNetUnfolder]: 1591/5911 cut-off events. [2021-10-15 20:24:13,839 INFO L130 PetriNetUnfolder]: For 5327/5327 co-relation queries the response was YES. [2021-10-15 20:24:13,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12922 conditions, 5911 events. 1591/5911 cut-off events. For 5327/5327 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 43241 event pairs, 0 based on Foata normal form. 380/5753 useless extension candidates. Maximal degree in co-relation 12890. Up to 1787 conditions per place. [2021-10-15 20:24:13,886 INFO L132 encePairwiseOnDemand]: 216/260 looper letters, 159 selfloop transitions, 31 changer transitions 14/329 dead transitions. [2021-10-15 20:24:13,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 329 transitions, 1819 flow [2021-10-15 20:24:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2021-10-15 20:24:13,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8192307692307692 [2021-10-15 20:24:13,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2021-10-15 20:24:13,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2021-10-15 20:24:13,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:13,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2021-10-15 20:24:13,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 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) [2021-10-15 20:24:13,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:13,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:13,899 INFO L186 Difference]: Start difference. First operand has 173 places, 288 transitions, 1321 flow. Second operand 3 states and 639 transitions. [2021-10-15 20:24:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 329 transitions, 1819 flow [2021-10-15 20:24:13,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 329 transitions, 1739 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:13,935 INFO L242 Difference]: Finished difference. Result has 175 places, 285 transitions, 1415 flow [2021-10-15 20:24:13,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1415, PETRI_PLACES=175, PETRI_TRANSITIONS=285} [2021-10-15 20:24:13,936 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 37 predicate places. [2021-10-15 20:24:13,936 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 285 transitions, 1415 flow [2021-10-15 20:24:13,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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) [2021-10-15 20:24:13,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:13,937 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:13,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 20:24:13,938 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2137552285, now seen corresponding path program 1 times [2021-10-15 20:24:13,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:13,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86755093] [2021-10-15 20:24:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:13,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:13,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:13,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86755093] [2021-10-15 20:24:13,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86755093] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:13,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:13,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:13,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864300318] [2021-10-15 20:24:13,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:13,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:13,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:13,980 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 260 [2021-10-15 20:24:13,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 285 transitions, 1415 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 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) [2021-10-15 20:24:13,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:13,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 260 [2021-10-15 20:24:13,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:14,939 INFO L129 PetriNetUnfolder]: 1614/6319 cut-off events. [2021-10-15 20:24:14,940 INFO L130 PetriNetUnfolder]: For 5517/5517 co-relation queries the response was YES. [2021-10-15 20:24:14,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11474 conditions, 6319 events. 1614/6319 cut-off events. For 5517/5517 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 47785 event pairs, 0 based on Foata normal form. 4/5765 useless extension candidates. Maximal degree in co-relation 11439. Up to 608 conditions per place. [2021-10-15 20:24:14,979 INFO L132 encePairwiseOnDemand]: 257/260 looper letters, 22 selfloop transitions, 3 changer transitions 0/286 dead transitions. [2021-10-15 20:24:14,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 286 transitions, 1469 flow [2021-10-15 20:24:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 727 transitions. [2021-10-15 20:24:14,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9320512820512821 [2021-10-15 20:24:14,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 727 transitions. [2021-10-15 20:24:14,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 727 transitions. [2021-10-15 20:24:14,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:14,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 727 transitions. [2021-10-15 20:24:14,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 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) [2021-10-15 20:24:14,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:14,992 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:14,992 INFO L186 Difference]: Start difference. First operand has 175 places, 285 transitions, 1415 flow. Second operand 3 states and 727 transitions. [2021-10-15 20:24:14,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 286 transitions, 1469 flow [2021-10-15 20:24:15,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 286 transitions, 1407 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:15,027 INFO L242 Difference]: Finished difference. Result has 176 places, 286 transitions, 1370 flow [2021-10-15 20:24:15,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1370, PETRI_PLACES=176, PETRI_TRANSITIONS=286} [2021-10-15 20:24:15,028 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 38 predicate places. [2021-10-15 20:24:15,028 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 286 transitions, 1370 flow [2021-10-15 20:24:15,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 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) [2021-10-15 20:24:15,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:15,029 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:15,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:24:15,030 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:15,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1456350433, now seen corresponding path program 1 times [2021-10-15 20:24:15,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:15,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121044303] [2021-10-15 20:24:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:15,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 20:24:15,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:15,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121044303] [2021-10-15 20:24:15,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121044303] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:15,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:15,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:15,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564247711] [2021-10-15 20:24:15,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:15,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:15,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:15,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:15,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 260 [2021-10-15 20:24:15,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 286 transitions, 1370 flow. Second operand has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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) [2021-10-15 20:24:15,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:15,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 260 [2021-10-15 20:24:15,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:16,344 INFO L129 PetriNetUnfolder]: 1983/7846 cut-off events. [2021-10-15 20:24:16,344 INFO L130 PetriNetUnfolder]: For 5428/5428 co-relation queries the response was YES. [2021-10-15 20:24:16,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13546 conditions, 7846 events. 1983/7846 cut-off events. For 5428/5428 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 63357 event pairs, 0 based on Foata normal form. 0/7190 useless extension candidates. Maximal degree in co-relation 13511. Up to 756 conditions per place. [2021-10-15 20:24:16,408 INFO L132 encePairwiseOnDemand]: 258/260 looper letters, 4 selfloop transitions, 1 changer transitions 0/285 dead transitions. [2021-10-15 20:24:16,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 285 transitions, 1375 flow [2021-10-15 20:24:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2021-10-15 20:24:16,412 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9769230769230769 [2021-10-15 20:24:16,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2021-10-15 20:24:16,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2021-10-15 20:24:16,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:16,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2021-10-15 20:24:16,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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) [2021-10-15 20:24:16,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:16,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:16,422 INFO L186 Difference]: Start difference. First operand has 176 places, 286 transitions, 1370 flow. Second operand 3 states and 762 transitions. [2021-10-15 20:24:16,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 285 transitions, 1375 flow [2021-10-15 20:24:16,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 285 transitions, 1370 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:16,454 INFO L242 Difference]: Finished difference. Result has 177 places, 285 transitions, 1362 flow [2021-10-15 20:24:16,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1362, PETRI_PLACES=177, PETRI_TRANSITIONS=285} [2021-10-15 20:24:16,455 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 39 predicate places. [2021-10-15 20:24:16,455 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 285 transitions, 1362 flow [2021-10-15 20:24:16,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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) [2021-10-15 20:24:16,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:16,456 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:16,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:24:16,457 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1301716177, now seen corresponding path program 1 times [2021-10-15 20:24:16,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:16,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226578678] [2021-10-15 20:24:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:16,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:16,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:16,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226578678] [2021-10-15 20:24:16,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226578678] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:16,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:16,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:16,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373372523] [2021-10-15 20:24:16,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:16,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:16,546 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 260 [2021-10-15 20:24:16,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 285 transitions, 1362 flow. Second operand has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 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) [2021-10-15 20:24:16,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:16,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 260 [2021-10-15 20:24:16,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:18,112 INFO L129 PetriNetUnfolder]: 3279/13752 cut-off events. [2021-10-15 20:24:18,112 INFO L130 PetriNetUnfolder]: For 9156/9156 co-relation queries the response was YES. [2021-10-15 20:24:18,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23985 conditions, 13752 events. 3279/13752 cut-off events. For 9156/9156 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 129395 event pairs, 0 based on Foata normal form. 0/12716 useless extension candidates. Maximal degree in co-relation 23950. Up to 1272 conditions per place. [2021-10-15 20:24:18,201 INFO L132 encePairwiseOnDemand]: 254/260 looper letters, 5 selfloop transitions, 4 changer transitions 0/287 dead transitions. [2021-10-15 20:24:18,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 287 transitions, 1384 flow [2021-10-15 20:24:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2021-10-15 20:24:18,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9602564102564103 [2021-10-15 20:24:18,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2021-10-15 20:24:18,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2021-10-15 20:24:18,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:18,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2021-10-15 20:24:18,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 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) [2021-10-15 20:24:18,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:18,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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) [2021-10-15 20:24:18,213 INFO L186 Difference]: Start difference. First operand has 177 places, 285 transitions, 1362 flow. Second operand 3 states and 749 transitions. [2021-10-15 20:24:18,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 287 transitions, 1384 flow [2021-10-15 20:24:18,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 287 transitions, 1383 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:18,257 INFO L242 Difference]: Finished difference. Result has 180 places, 287 transitions, 1389 flow [2021-10-15 20:24:18,258 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1389, PETRI_PLACES=180, PETRI_TRANSITIONS=287} [2021-10-15 20:24:18,258 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 42 predicate places. [2021-10-15 20:24:18,259 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 287 transitions, 1389 flow [2021-10-15 20:24:18,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 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) [2021-10-15 20:24:18,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:18,260 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:18,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 20:24:18,261 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1019375947, now seen corresponding path program 1 times [2021-10-15 20:24:18,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:18,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757829042] [2021-10-15 20:24:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:18,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:24:18,281 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:24:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:24:18,341 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:24:18,341 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:24:18,343 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:24:18,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 20:24:18,353 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:24:18,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:24:18 BoogieIcfgContainer [2021-10-15 20:24:18,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:24:18,431 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:24:18,431 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:24:18,431 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:24:18,432 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:07" (3/4) ... [2021-10-15 20:24:18,434 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 20:24:18,521 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:24:18,521 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:24:18,523 INFO L168 Benchmark]: Toolchain (without parser) took 12874.75 ms. Allocated memory was 111.1 MB in the beginning and 690.0 MB in the end (delta: 578.8 MB). Free memory was 74.5 MB in the beginning and 334.8 MB in the end (delta: -260.3 MB). Peak memory consumption was 319.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:18,524 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 82.5 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:24:18,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.82 ms. Allocated memory is still 111.1 MB. Free memory was 74.4 MB in the beginning and 81.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:18,525 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.22 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 78.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:18,525 INFO L168 Benchmark]: Boogie Preprocessor took 69.38 ms. Allocated memory is still 111.1 MB. Free memory was 78.6 MB in the beginning and 76.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:18,526 INFO L168 Benchmark]: RCFGBuilder took 840.87 ms. Allocated memory is still 111.1 MB. Free memory was 76.5 MB in the beginning and 46.6 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:18,526 INFO L168 Benchmark]: TraceAbstraction took 11344.78 ms. Allocated memory was 111.1 MB in the beginning and 690.0 MB in the end (delta: 578.8 MB). Free memory was 46.1 MB in the beginning and 342.2 MB in the end (delta: -296.0 MB). Peak memory consumption was 282.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:18,527 INFO L168 Benchmark]: Witness Printer took 90.70 ms. Allocated memory is still 690.0 MB. Free memory was 342.2 MB in the beginning and 334.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:18,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 82.5 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 446.82 ms. Allocated memory is still 111.1 MB. Free memory was 74.4 MB in the beginning and 81.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.22 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 78.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.38 ms. Allocated memory is still 111.1 MB. Free memory was 78.6 MB in the beginning and 76.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 840.87 ms. Allocated memory is still 111.1 MB. Free memory was 76.5 MB in the beginning and 46.6 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11344.78 ms. Allocated memory was 111.1 MB in the beginning and 690.0 MB in the end (delta: 578.8 MB). Free memory was 46.1 MB in the beginning and 342.2 MB in the end (delta: -296.0 MB). Peak memory consumption was 282.2 MB. Max. memory is 16.1 GB. * Witness Printer took 90.70 ms. Allocated memory is still 690.0 MB. Free memory was 342.2 MB in the beginning and 334.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 652]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L657] int s ; [L658] int tmp ; [L662] s = 8464 [L23] int s__info_callback = __VERIFIER_nondet_int() ; [L24] int s__in_handshake = __VERIFIER_nondet_int() ; [L25] int s__state ; [L26] int s__new_session ; [L27] int s__server ; [L28] int s__version = __VERIFIER_nondet_int() ; [L29] int s__type ; [L30] int s__init_num ; [L31] int s__hit = __VERIFIER_nondet_int() ; [L32] int s__rwstate ; [L33] int s__init_buf___0 = 1; [L34] int s__debug = __VERIFIER_nondet_int() ; [L35] int s__shutdown ; [L36] int s__cert = __VERIFIER_nondet_int() ; [L37] int s__options = __VERIFIER_nondet_int() ; [L38] int s__verify_mode = __VERIFIER_nondet_int() ; [L39] int s__session__peer = __VERIFIER_nondet_int() ; [L40] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L41] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L42] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L43] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L44] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L45] int s__s3__tmp__cert_request ; [L46] int s__s3__tmp__reuse_message ; [L47] int s__s3__tmp__use_rsa_tmp ; [L48] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L49] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L50] int s__s3__tmp__next_state___0 ; [L51] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L52] int s__session__cipher ; [L53] int buf ; [L54] unsigned long l ; [L55] unsigned long Time ; [L56] unsigned long tmp ; [L57] int cb ; [L58] long num1 = __VERIFIER_nondet_long() ; [L59] int ret ; [L60] int new_state ; [L61] int state ; [L62] int skip ; [L63] int got_new_session ; [L64] int tmp___1 = __VERIFIER_nondet_int() ; [L65] int tmp___2 = __VERIFIER_nondet_int() ; [L66] int tmp___3 = __VERIFIER_nondet_int() ; [L67] int tmp___4 = __VERIFIER_nondet_int() ; [L68] int tmp___5 = __VERIFIER_nondet_int() ; [L69] int tmp___6 = __VERIFIER_nondet_int() ; [L70] int tmp___7 ; [L71] long tmp___8 = __VERIFIER_nondet_long() ; [L72] int tmp___9 = __VERIFIER_nondet_int() ; [L73] int tmp___10 = __VERIFIER_nondet_int() ; [L74] int blastFlag ; [L75] int __cil_tmp55 ; [L76] unsigned long __cil_tmp56 ; [L77] unsigned long __cil_tmp57 ; [L78] unsigned long __cil_tmp58 ; [L79] unsigned long __cil_tmp59 ; [L80] int __cil_tmp60 ; [L81] unsigned long __cil_tmp61 ; [L84] s__s3__tmp__reuse_message = 0 [L85] s__state = initial_state [L86] blastFlag = 0 [L87] tmp = __VERIFIER_nondet_int() [L88] Time = tmp [L89] cb = 0 [L90] ret = -1 [L91] skip = 0 [L92] got_new_session = 0 [L93] COND FALSE !(s__info_callback != 0) [L96] COND FALSE !(s__ctx__info_callback != 0) [L100] s__in_handshake ++ [L101] COND TRUE tmp___1 + 12288 [L102] COND TRUE tmp___2 + 16384 [L106] COND FALSE !(s__cert == 0) [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND TRUE s__state == 8464 [L283] s__shutdown = 0 [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 0 [L286] blastFlag = 1 [L288] COND FALSE !(ret <= 0) [L291] got_new_session = 1 [L292] s__state = 8496 [L293] s__init_num = 0 [L614] COND TRUE ! s__s3__tmp__reuse_message [L615] COND TRUE ! skip [L616] COND TRUE tmp___1 != -12288 [L617] COND TRUE s__state != 8656 [L618] COND TRUE tmp___2 != -16384 [L619] COND FALSE !(state == 8496) [L626] COND FALSE !(\read(s__debug)) [L632] COND FALSE !(cb != 0) [L641] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND TRUE s__state == 8496 [L297] ret = __VERIFIER_nondet_int() [L298] COND TRUE blastFlag == 1 [L299] blastFlag = 2 [L301] COND FALSE !(ret <= 0) [L304] COND FALSE !(\read(s__hit)) [L307] s__state = 8512 [L309] s__init_num = 0 [L614] COND TRUE ! s__s3__tmp__reuse_message [L615] COND TRUE ! skip [L616] COND TRUE tmp___1 != -12288 [L617] COND TRUE s__state != 8656 [L618] COND TRUE tmp___2 != -16384 [L619] COND TRUE state == 8496 [L652] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 151 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 11.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11206.0ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 9558.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 135.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 398 SDtfs, 669 SDslu, 49 SDs, 0 SdLazy, 966 SolverSat, 343 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1013.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1415occurred in iteration=14, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 85.6ms SsaConstructionTime, 343.3ms SatisfiabilityAnalysisTime, 669.0ms InterpolantComputationTime, 690 NumberOfCodeBlocks, 690 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 616 ConstructedInterpolants, 0 QuantifiedInterpolants, 1680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 121/121 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 20:24:18,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc527fa5-fad6-4b80-8380-22bc37a05826/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...