./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_5.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_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/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_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/locks/test_locks_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/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_f8f3d40c-a500-4742-9861-8004c4609340/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 d28fd50bd3f7e49bee026aec860ad9015a4fdfba ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:06:05,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:05,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:05,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:05,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:05,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:05,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:05,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:05,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:05,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:05,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:05,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:05,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:05,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:05,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:05,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:05,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:05,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:05,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:05,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:05,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:05,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:05,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:05,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:05,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:05,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:05,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:05,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:05,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:05,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:05,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:05,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:05,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:05,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:05,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:05,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:05,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:05,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:05,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:05,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:05,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:05,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:05,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:05,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:05,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:05,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:05,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:05,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:05,406 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:05,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:05,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:05,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:05,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:05,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:05,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:05,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:05,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:05,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:05,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:05,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:05,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:05,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:05,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:05,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:05,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:05,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:05,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:05,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:05,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:05,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:05,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:05,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:05,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:05,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:05,411 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_f8f3d40c-a500-4742-9861-8004c4609340/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28fd50bd3f7e49bee026aec860ad9015a4fdfba [2021-10-15 19:06:05,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:05,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:05,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:05,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:05,711 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:05,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/locks/test_locks_5.c [2021-10-15 19:06:05,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/data/9afd1e018/3f79f1aaf52343edbbb4852cd29dd4a9/FLAGd540d5b13 [2021-10-15 19:06:06,242 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:06,243 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/sv-benchmarks/c/locks/test_locks_5.c [2021-10-15 19:06:06,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/data/9afd1e018/3f79f1aaf52343edbbb4852cd29dd4a9/FLAGd540d5b13 [2021-10-15 19:06:06,630 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/data/9afd1e018/3f79f1aaf52343edbbb4852cd29dd4a9 [2021-10-15 19:06:06,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:06,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:06,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:06,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:06,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:06,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:06,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569f61cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06, skipping insertion in model container [2021-10-15 19:06:06,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:06,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:06,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:06,890 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_f8f3d40c-a500-4742-9861-8004c4609340/sv-benchmarks/c/locks/test_locks_5.c[2207,2220] [2021-10-15 19:06:06,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:06,901 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:06,936 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_f8f3d40c-a500-4742-9861-8004c4609340/sv-benchmarks/c/locks/test_locks_5.c[2207,2220] [2021-10-15 19:06:06,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:06,955 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:06,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06 WrapperNode [2021-10-15 19:06:06,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:06,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:06,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:06,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:06,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:06,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:06,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:06,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:06,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:06,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:07,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:07,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:07,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:07,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:07,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:07,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:07,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:07,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:07,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:07,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:07,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:07,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:07,312 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-15 19:06:07,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:07 BoogieIcfgContainer [2021-10-15 19:06:07,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:07,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:07,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:07,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:07,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:06" (1/3) ... [2021-10-15 19:06:07,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e6741c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:07, skipping insertion in model container [2021-10-15 19:06:07,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06" (2/3) ... [2021-10-15 19:06:07,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e6741c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:07, skipping insertion in model container [2021-10-15 19:06:07,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:07" (3/3) ... [2021-10-15 19:06:07,323 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2021-10-15 19:06:07,328 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:07,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:06:07,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:07,385 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 19:06:07,386 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:06:07,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 25 places, 42 transitions, 84 flow [2021-10-15 19:06:07,417 INFO L129 PetriNetUnfolder]: 18/42 cut-off events. [2021-10-15 19:06:07,417 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:07,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 42 events. 18/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 19:06:07,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 42 transitions, 84 flow [2021-10-15 19:06:07,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 35 transitions, 70 flow [2021-10-15 19:06:07,429 INFO L129 PetriNetUnfolder]: 8/23 cut-off events. [2021-10-15 19:06:07,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:07,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:07,430 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:07,431 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 803849039, now seen corresponding path program 1 times [2021-10-15 19:06:07,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:07,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028121047] [2021-10-15 19:06:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:07,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:07,655 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 19:06:07,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:07,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028121047] [2021-10-15 19:06:07,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028121047] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:07,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:07,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:07,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488236023] [2021-10-15 19:06:07,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:07,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:07,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:07,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:07,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 35 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:07,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:07,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:07,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:07,771 INFO L129 PetriNetUnfolder]: 26/64 cut-off events. [2021-10-15 19:06:07,772 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:07,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 26/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 107 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 19. Up to 9 conditions per place. [2021-10-15 19:06:07,776 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 5 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2021-10-15 19:06:07,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 88 flow [2021-10-15 19:06:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2021-10-15 19:06:07,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-10-15 19:06:07,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2021-10-15 19:06:07,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2021-10-15 19:06:07,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:07,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2021-10-15 19:06:07,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:07,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:07,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:07,813 INFO L186 Difference]: Start difference. First operand has 21 places, 35 transitions, 70 flow. Second operand 3 states and 111 transitions. [2021-10-15 19:06:07,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 88 flow [2021-10-15 19:06:07,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:07,824 INFO L242 Difference]: Finished difference. Result has 25 places, 37 transitions, 90 flow [2021-10-15 19:06:07,826 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=25, PETRI_TRANSITIONS=37} [2021-10-15 19:06:07,827 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2021-10-15 19:06:07,828 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 37 transitions, 90 flow [2021-10-15 19:06:07,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:07,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:07,829 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:07,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:06:07,829 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:07,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1613195665, now seen corresponding path program 1 times [2021-10-15 19:06:07,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:07,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137427269] [2021-10-15 19:06:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:07,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:07,939 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 19:06:07,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:07,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137427269] [2021-10-15 19:06:07,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137427269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:07,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:07,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:07,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594617022] [2021-10-15 19:06:07,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:07,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:07,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:07,945 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:07,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 37 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:07,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:07,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:07,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:07,976 INFO L129 PetriNetUnfolder]: 32/82 cut-off events. [2021-10-15 19:06:07,976 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 19:06:07,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 82 events. 32/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 193 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 38. Up to 12 conditions per place. [2021-10-15 19:06:07,978 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 2 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2021-10-15 19:06:07,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 37 transitions, 100 flow [2021-10-15 19:06:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2021-10-15 19:06:07,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2021-10-15 19:06:07,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2021-10-15 19:06:07,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2021-10-15 19:06:07,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:07,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2021-10-15 19:06:07,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 19:06:07,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:07,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:07,989 INFO L186 Difference]: Start difference. First operand has 25 places, 37 transitions, 90 flow. Second operand 3 states and 108 transitions. [2021-10-15 19:06:07,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 37 transitions, 100 flow [2021-10-15 19:06:07,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 37 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:07,992 INFO L242 Difference]: Finished difference. Result has 27 places, 37 transitions, 99 flow [2021-10-15 19:06:07,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=27, PETRI_TRANSITIONS=37} [2021-10-15 19:06:07,993 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2021-10-15 19:06:07,993 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 37 transitions, 99 flow [2021-10-15 19:06:07,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:07,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:07,994 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:07,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:06:07,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1530326969, now seen corresponding path program 1 times [2021-10-15 19:06:07,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:07,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97120388] [2021-10-15 19:06:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:07,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,079 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 19:06:08,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97120388] [2021-10-15 19:06:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97120388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957971790] [2021-10-15 19:06:08,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 37 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,129 INFO L129 PetriNetUnfolder]: 24/65 cut-off events. [2021-10-15 19:06:08,129 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 19:06:08,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 65 events. 24/65 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 44. Up to 8 conditions per place. [2021-10-15 19:06:08,131 INFO L132 encePairwiseOnDemand]: 39/42 looper letters, 6 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2021-10-15 19:06:08,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 110 flow [2021-10-15 19:06:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2021-10-15 19:06:08,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.873015873015873 [2021-10-15 19:06:08,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,143 INFO L186 Difference]: Start difference. First operand has 27 places, 37 transitions, 99 flow. Second operand 3 states and 110 transitions. [2021-10-15 19:06:08,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 110 flow [2021-10-15 19:06:08,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 99 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:08,147 INFO L242 Difference]: Finished difference. Result has 28 places, 36 transitions, 93 flow [2021-10-15 19:06:08,147 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=36} [2021-10-15 19:06:08,147 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2021-10-15 19:06:08,148 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 36 transitions, 93 flow [2021-10-15 19:06:08,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,148 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,148 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:06:08,149 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash -850268599, now seen corresponding path program 1 times [2021-10-15 19:06:08,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813938669] [2021-10-15 19:06:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,219 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 19:06:08,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813938669] [2021-10-15 19:06:08,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813938669] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826254445] [2021-10-15 19:06:08,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 36 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,261 INFO L129 PetriNetUnfolder]: 40/116 cut-off events. [2021-10-15 19:06:08,261 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 19:06:08,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 116 events. 40/116 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 325 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 73. Up to 14 conditions per place. [2021-10-15 19:06:08,264 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 5 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2021-10-15 19:06:08,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 111 flow [2021-10-15 19:06:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2021-10-15 19:06:08,267 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-10-15 19:06:08,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2021-10-15 19:06:08,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2021-10-15 19:06:08,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2021-10-15 19:06:08,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,273 INFO L186 Difference]: Start difference. First operand has 28 places, 36 transitions, 93 flow. Second operand 3 states and 111 transitions. [2021-10-15 19:06:08,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 111 flow [2021-10-15 19:06:08,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 110 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:08,279 INFO L242 Difference]: Finished difference. Result has 31 places, 38 transitions, 112 flow [2021-10-15 19:06:08,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=31, PETRI_TRANSITIONS=38} [2021-10-15 19:06:08,280 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2021-10-15 19:06:08,280 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 38 transitions, 112 flow [2021-10-15 19:06:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,281 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:06:08,281 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash -40921973, now seen corresponding path program 1 times [2021-10-15 19:06:08,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079824850] [2021-10-15 19:06:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,349 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 19:06:08,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079824850] [2021-10-15 19:06:08,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079824850] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101211842] [2021-10-15 19:06:08,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:08,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,406 INFO L129 PetriNetUnfolder]: 48/144 cut-off events. [2021-10-15 19:06:08,409 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 19:06:08,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 144 events. 48/144 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 526 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 89. Up to 18 conditions per place. [2021-10-15 19:06:08,412 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 2 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2021-10-15 19:06:08,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 122 flow [2021-10-15 19:06:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2021-10-15 19:06:08,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2021-10-15 19:06:08,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2021-10-15 19:06:08,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2021-10-15 19:06:08,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2021-10-15 19:06:08,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 19:06:08,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,417 INFO L186 Difference]: Start difference. First operand has 31 places, 38 transitions, 112 flow. Second operand 3 states and 108 transitions. [2021-10-15 19:06:08,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 122 flow [2021-10-15 19:06:08,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:08,420 INFO L242 Difference]: Finished difference. Result has 33 places, 38 transitions, 121 flow [2021-10-15 19:06:08,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=33, PETRI_TRANSITIONS=38} [2021-10-15 19:06:08,420 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2021-10-15 19:06:08,421 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 38 transitions, 121 flow [2021-10-15 19:06:08,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:08,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,421 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:06:08,422 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1268365854, now seen corresponding path program 1 times [2021-10-15 19:06:08,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103820144] [2021-10-15 19:06:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,485 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 19:06:08,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103820144] [2021-10-15 19:06:08,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103820144] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984924903] [2021-10-15 19:06:08,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 38 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,535 INFO L129 PetriNetUnfolder]: 36/114 cut-off events. [2021-10-15 19:06:08,536 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-10-15 19:06:08,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 114 events. 36/114 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 333 event pairs, 0 based on Foata normal form. 2/79 useless extension candidates. Maximal degree in co-relation 88. Up to 12 conditions per place. [2021-10-15 19:06:08,543 INFO L132 encePairwiseOnDemand]: 39/42 looper letters, 6 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2021-10-15 19:06:08,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 132 flow [2021-10-15 19:06:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2021-10-15 19:06:08,544 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.873015873015873 [2021-10-15 19:06:08,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,548 INFO L186 Difference]: Start difference. First operand has 33 places, 38 transitions, 121 flow. Second operand 3 states and 110 transitions. [2021-10-15 19:06:08,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 132 flow [2021-10-15 19:06:08,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 121 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:08,552 INFO L242 Difference]: Finished difference. Result has 34 places, 37 transitions, 115 flow [2021-10-15 19:06:08,553 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=34, PETRI_TRANSITIONS=37} [2021-10-15 19:06:08,553 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2021-10-15 19:06:08,553 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 37 transitions, 115 flow [2021-10-15 19:06:08,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,554 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,554 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:06:08,555 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash -588307484, now seen corresponding path program 1 times [2021-10-15 19:06:08,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625995427] [2021-10-15 19:06:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,599 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 19:06:08,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625995427] [2021-10-15 19:06:08,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625995427] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597848262] [2021-10-15 19:06:08,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 37 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,626 INFO L129 PetriNetUnfolder]: 56/202 cut-off events. [2021-10-15 19:06:08,626 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-10-15 19:06:08,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 202 events. 56/202 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 885 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 145. Up to 20 conditions per place. [2021-10-15 19:06:08,628 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 5 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2021-10-15 19:06:08,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 133 flow [2021-10-15 19:06:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2021-10-15 19:06:08,630 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-10-15 19:06:08,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2021-10-15 19:06:08,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2021-10-15 19:06:08,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2021-10-15 19:06:08,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,633 INFO L186 Difference]: Start difference. First operand has 34 places, 37 transitions, 115 flow. Second operand 3 states and 111 transitions. [2021-10-15 19:06:08,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 133 flow [2021-10-15 19:06:08,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:08,636 INFO L242 Difference]: Finished difference. Result has 37 places, 39 transitions, 134 flow [2021-10-15 19:06:08,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=37, PETRI_TRANSITIONS=39} [2021-10-15 19:06:08,636 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2021-10-15 19:06:08,637 INFO L470 AbstractCegarLoop]: Abstraction has has 37 places, 39 transitions, 134 flow [2021-10-15 19:06:08,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,637 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:06:08,638 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,638 INFO L82 PathProgramCache]: Analyzing trace with hash 221039142, now seen corresponding path program 1 times [2021-10-15 19:06:08,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159795645] [2021-10-15 19:06:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,662 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 19:06:08,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159795645] [2021-10-15 19:06:08,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159795645] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454545539] [2021-10-15 19:06:08,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:08,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,692 INFO L129 PetriNetUnfolder]: 64/242 cut-off events. [2021-10-15 19:06:08,692 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:06:08,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 242 events. 64/242 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1206 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 174. Up to 25 conditions per place. [2021-10-15 19:06:08,696 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 2 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2021-10-15 19:06:08,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 39 transitions, 144 flow [2021-10-15 19:06:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2021-10-15 19:06:08,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2021-10-15 19:06:08,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2021-10-15 19:06:08,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2021-10-15 19:06:08,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2021-10-15 19:06:08,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 19:06:08,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,700 INFO L186 Difference]: Start difference. First operand has 37 places, 39 transitions, 134 flow. Second operand 3 states and 108 transitions. [2021-10-15 19:06:08,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 39 transitions, 144 flow [2021-10-15 19:06:08,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:08,709 INFO L242 Difference]: Finished difference. Result has 39 places, 39 transitions, 143 flow [2021-10-15 19:06:08,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2021-10-15 19:06:08,709 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2021-10-15 19:06:08,709 INFO L470 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 143 flow [2021-10-15 19:06:08,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:08,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,710 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:06:08,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1057447170, now seen corresponding path program 1 times [2021-10-15 19:06:08,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001659869] [2021-10-15 19:06:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,758 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 19:06:08,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001659869] [2021-10-15 19:06:08,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001659869] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79677293] [2021-10-15 19:06:08,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,760 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:08,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,802 INFO L129 PetriNetUnfolder]: 100/418 cut-off events. [2021-10-15 19:06:08,803 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-10-15 19:06:08,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 418 events. 100/418 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2760 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 330. Up to 63 conditions per place. [2021-10-15 19:06:08,806 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 5 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2021-10-15 19:06:08,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 42 transitions, 172 flow [2021-10-15 19:06:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2021-10-15 19:06:08,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.873015873015873 [2021-10-15 19:06:08,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,809 INFO L186 Difference]: Start difference. First operand has 39 places, 39 transitions, 143 flow. Second operand 3 states and 110 transitions. [2021-10-15 19:06:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 42 transitions, 172 flow [2021-10-15 19:06:08,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:08,813 INFO L242 Difference]: Finished difference. Result has 41 places, 42 transitions, 170 flow [2021-10-15 19:06:08,813 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2021-10-15 19:06:08,813 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2021-10-15 19:06:08,813 INFO L470 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 170 flow [2021-10-15 19:06:08,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:08,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,814 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:06:08,814 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1748115130, now seen corresponding path program 1 times [2021-10-15 19:06:08,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777206467] [2021-10-15 19:06:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,855 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 19:06:08,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777206467] [2021-10-15 19:06:08,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777206467] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532694952] [2021-10-15 19:06:08,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,903 INFO L129 PetriNetUnfolder]: 72/330 cut-off events. [2021-10-15 19:06:08,903 INFO L130 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2021-10-15 19:06:08,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 330 events. 72/330 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1976 event pairs, 0 based on Foata normal form. 4/259 useless extension candidates. Maximal degree in co-relation 347. Up to 42 conditions per place. [2021-10-15 19:06:08,906 INFO L132 encePairwiseOnDemand]: 39/42 looper letters, 6 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2021-10-15 19:06:08,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 172 flow [2021-10-15 19:06:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2021-10-15 19:06:08,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.873015873015873 [2021-10-15 19:06:08,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2021-10-15 19:06:08,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:08,910 INFO L186 Difference]: Start difference. First operand has 41 places, 42 transitions, 170 flow. Second operand 3 states and 110 transitions. [2021-10-15 19:06:08,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 172 flow [2021-10-15 19:06:08,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 159 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:08,913 INFO L242 Difference]: Finished difference. Result has 42 places, 40 transitions, 153 flow [2021-10-15 19:06:08,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2021-10-15 19:06:08,914 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2021-10-15 19:06:08,914 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 153 flow [2021-10-15 19:06:08,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,914 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,915 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:06:08,915 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1866793796, now seen corresponding path program 1 times [2021-10-15 19:06:08,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940120780] [2021-10-15 19:06:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,950 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 19:06:08,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940120780] [2021-10-15 19:06:08,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940120780] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616673040] [2021-10-15 19:06:08,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:08,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:08,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:08,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:09,026 INFO L129 PetriNetUnfolder]: 64/394 cut-off events. [2021-10-15 19:06:09,027 INFO L130 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2021-10-15 19:06:09,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 394 events. 64/394 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2673 event pairs, 0 based on Foata normal form. 8/327 useless extension candidates. Maximal degree in co-relation 330. Up to 49 conditions per place. [2021-10-15 19:06:09,030 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 5 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2021-10-15 19:06:09,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 163 flow [2021-10-15 19:06:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2021-10-15 19:06:09,032 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-10-15 19:06:09,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2021-10-15 19:06:09,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2021-10-15 19:06:09,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:09,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2021-10-15 19:06:09,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:09,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:09,034 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 153 flow. Second operand 3 states and 111 transitions. [2021-10-15 19:06:09,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 163 flow [2021-10-15 19:06:09,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:09,040 INFO L242 Difference]: Finished difference. Result has 45 places, 40 transitions, 164 flow [2021-10-15 19:06:09,040 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2021-10-15 19:06:09,041 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2021-10-15 19:06:09,041 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 164 flow [2021-10-15 19:06:09,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:09,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:09,042 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:09,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:06:09,042 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:09,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2035816837, now seen corresponding path program 1 times [2021-10-15 19:06:09,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:09,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881611630] [2021-10-15 19:06:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:09,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:09,076 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 19:06:09,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:09,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881611630] [2021-10-15 19:06:09,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881611630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:09,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:09,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:09,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167497006] [2021-10-15 19:06:09,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:09,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:09,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:09,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:09,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:09,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:09,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:09,141 INFO L129 PetriNetUnfolder]: 96/618 cut-off events. [2021-10-15 19:06:09,141 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2021-10-15 19:06:09,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 618 events. 96/618 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5000 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 572. Up to 123 conditions per place. [2021-10-15 19:06:09,146 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 5 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2021-10-15 19:06:09,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 192 flow [2021-10-15 19:06:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2021-10-15 19:06:09,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.873015873015873 [2021-10-15 19:06:09,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2021-10-15 19:06:09,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2021-10-15 19:06:09,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:09,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2021-10-15 19:06:09,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:09,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:09,150 INFO L186 Difference]: Start difference. First operand has 45 places, 40 transitions, 164 flow. Second operand 3 states and 110 transitions. [2021-10-15 19:06:09,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 192 flow [2021-10-15 19:06:09,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:09,154 INFO L242 Difference]: Finished difference. Result has 47 places, 43 transitions, 192 flow [2021-10-15 19:06:09,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2021-10-15 19:06:09,154 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2021-10-15 19:06:09,155 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 192 flow [2021-10-15 19:06:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 19:06:09,156 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:09,156 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:09,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:06:09,156 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1449803833, now seen corresponding path program 1 times [2021-10-15 19:06:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:09,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430577295] [2021-10-15 19:06:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:09,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:09,180 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 19:06:09,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:09,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430577295] [2021-10-15 19:06:09,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430577295] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:09,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:09,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:09,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766676696] [2021-10-15 19:06:09,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:09,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:09,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:09,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:09,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 42 [2021-10-15 19:06:09,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:09,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:09,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 42 [2021-10-15 19:06:09,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:09,255 INFO L129 PetriNetUnfolder]: 80/658 cut-off events. [2021-10-15 19:06:09,255 INFO L130 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2021-10-15 19:06:09,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 658 events. 80/658 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5468 event pairs, 0 based on Foata normal form. 16/627 useless extension candidates. Maximal degree in co-relation 736. Up to 98 conditions per place. [2021-10-15 19:06:09,258 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2021-10-15 19:06:09,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 200 flow [2021-10-15 19:06:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2021-10-15 19:06:09,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-10-15 19:06:09,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2021-10-15 19:06:09,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2021-10-15 19:06:09,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:09,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2021-10-15 19:06:09,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:09,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 19:06:09,262 INFO L186 Difference]: Start difference. First operand has 47 places, 43 transitions, 192 flow. Second operand 3 states and 111 transitions. [2021-10-15 19:06:09,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 200 flow [2021-10-15 19:06:09,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:09,266 INFO L242 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2021-10-15 19:06:09,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2021-10-15 19:06:09,267 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2021-10-15 19:06:09,267 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2021-10-15 19:06:09,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 19:06:09,270 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:09,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:06:09,275 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:06:09,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:06:09 BoogieIcfgContainer [2021-10-15 19:06:09,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:06:09,282 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:06:09,282 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:06:09,282 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:06:09,282 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:07" (3/4) ... [2021-10-15 19:06:09,287 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:06:09,303 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-15 19:06:09,303 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:06:09,303 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:09,304 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:09,353 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:06:09,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:06:09,355 INFO L168 Benchmark]: Toolchain (without parser) took 2720.27 ms. Allocated memory is still 119.5 MB. Free memory was 86.4 MB in the beginning and 53.1 MB in the end (delta: 33.2 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:09,355 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 77.6 MB. Free memory was 51.8 MB in the beginning and 51.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:09,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.13 ms. Allocated memory is still 119.5 MB. Free memory was 86.4 MB in the beginning and 97.2 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:09,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.72 ms. Allocated memory is still 119.5 MB. Free memory was 97.2 MB in the beginning and 95.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:09,357 INFO L168 Benchmark]: Boogie Preprocessor took 21.64 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 94.4 MB in the end (delta: 630.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:09,357 INFO L168 Benchmark]: RCFGBuilder took 298.38 ms. Allocated memory is still 119.5 MB. Free memory was 94.4 MB in the beginning and 84.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:09,358 INFO L168 Benchmark]: TraceAbstraction took 1963.76 ms. Allocated memory is still 119.5 MB. Free memory was 83.2 MB in the beginning and 56.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:09,358 INFO L168 Benchmark]: Witness Printer took 71.67 ms. Allocated memory is still 119.5 MB. Free memory was 56.2 MB in the beginning and 53.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:09,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 77.6 MB. Free memory was 51.8 MB in the beginning and 51.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.13 ms. Allocated memory is still 119.5 MB. Free memory was 86.4 MB in the beginning and 97.2 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.72 ms. Allocated memory is still 119.5 MB. Free memory was 97.2 MB in the beginning and 95.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.64 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 94.4 MB in the end (delta: 630.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 298.38 ms. Allocated memory is still 119.5 MB. Free memory was 94.4 MB in the beginning and 84.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1963.76 ms. Allocated memory is still 119.5 MB. Free memory was 83.2 MB in the beginning and 56.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * Witness Printer took 71.67 ms. Allocated memory is still 119.5 MB. Free memory was 56.2 MB in the beginning and 53.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 93]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1900.9ms, OverallIterations: 13, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 866.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 38.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 7 SDslu, 0 SDs, 0 SdLazy, 69 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 110.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=12, InterpolantAutomatonStates: 39, 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: 43.7ms SsaConstructionTime, 194.6ms SatisfiabilityAnalysisTime, 474.1ms InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:06:09,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f3d40c-a500-4742-9861-8004c4609340/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...