./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label20.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_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/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_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/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_2d088621-26d7-4f8e-8533-004b27310380/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 6e09c4e3c62f766a4d5c6b2391f1938dd364423c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:51:47,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:51:47,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:51:47,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:51:47,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:51:47,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:51:47,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:51:47,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:51:47,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:51:47,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:51:47,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:51:47,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:51:47,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:51:47,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:51:47,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:51:47,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:51:47,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:51:47,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:51:47,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:51:47,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:51:47,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:51:47,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:51:47,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:51:47,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:51:47,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:51:47,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:51:47,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:51:47,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:51:47,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:51:47,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:51:47,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:51:47,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:51:47,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:51:47,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:51:47,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:51:47,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:51:47,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:51:47,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:51:47,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:51:47,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:51:47,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:51:47,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:51:47,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:51:47,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:51:47,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:51:47,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:51:47,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:51:47,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:51:47,707 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:51:47,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:51:47,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:51:47,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:51:47,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:51:47,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:51:47,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:51:47,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:51:47,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:51:47,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:51:47,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:51:47,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:51:47,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:51:47,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:51:47,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:51:47,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:51:47,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:51:47,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:51:47,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:51:47,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:51:47,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:51:47,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:51:47,713 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:51:47,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:51:47,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:51:47,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:51:47,714 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_2d088621-26d7-4f8e-8533-004b27310380/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e09c4e3c62f766a4d5c6b2391f1938dd364423c [2021-10-15 19:51:48,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:51:48,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:51:48,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:51:48,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:51:48,153 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:51:48,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem02_label20.c [2021-10-15 19:51:48,237 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/data/cb6b1810b/41787eb20dc24ab88540d61bb14fc6a6/FLAGc821ba6b6 [2021-10-15 19:51:48,956 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:51:48,957 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/sv-benchmarks/c/eca-rers2012/Problem02_label20.c [2021-10-15 19:51:48,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/data/cb6b1810b/41787eb20dc24ab88540d61bb14fc6a6/FLAGc821ba6b6 [2021-10-15 19:51:49,129 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/data/cb6b1810b/41787eb20dc24ab88540d61bb14fc6a6 [2021-10-15 19:51:49,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:51:49,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:51:49,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:51:49,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:51:49,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:51:49,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368d6968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49, skipping insertion in model container [2021-10-15 19:51:49,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:51:49,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:51:49,563 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_2d088621-26d7-4f8e-8533-004b27310380/sv-benchmarks/c/eca-rers2012/Problem02_label20.c[16674,16687] [2021-10-15 19:51:49,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:51:49,636 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:51:49,737 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_2d088621-26d7-4f8e-8533-004b27310380/sv-benchmarks/c/eca-rers2012/Problem02_label20.c[16674,16687] [2021-10-15 19:51:49,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:51:49,772 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:51:49,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49 WrapperNode [2021-10-15 19:51:49,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:51:49,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:51:49,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:51:49,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:51:49,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:51:49,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:51:49,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:51:49,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:51:49,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:49,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:51:49,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:51:49,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:51:49,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:51:49,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (1/1) ... [2021-10-15 19:51:50,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:51:50,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:51:50,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:51:50,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:51:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:51:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:51:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:51:50,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:51:51,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:51:51,382 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:51:51,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:51:51 BoogieIcfgContainer [2021-10-15 19:51:51,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:51:51,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:51:51,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:51:51,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:51:51,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:51:49" (1/3) ... [2021-10-15 19:51:51,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b31f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:51:51, skipping insertion in model container [2021-10-15 19:51:51,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:51:49" (2/3) ... [2021-10-15 19:51:51,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b31f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:51:51, skipping insertion in model container [2021-10-15 19:51:51,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:51:51" (3/3) ... [2021-10-15 19:51:51,395 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label20.c [2021-10-15 19:51:51,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:51:51,402 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:51:51,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:51:51,466 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 19:51:51,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:51:51,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:51:51,620 INFO L129 PetriNetUnfolder]: 149/375 cut-off events. [2021-10-15 19:51:51,621 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:51:51,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 375 events. 149/375 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 262 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 19:51:51,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:51:51,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 370 transitions, 740 flow [2021-10-15 19:51:51,664 INFO L129 PetriNetUnfolder]: 104/242 cut-off events. [2021-10-15 19:51:51,665 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:51:51,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:51:51,666 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:51:51,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:51:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:51:51,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1124491187, now seen corresponding path program 1 times [2021-10-15 19:51:51,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:51:51,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891876457] [2021-10-15 19:51:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:51:51,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:51:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:51:52,154 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 19:51:52,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:51:52,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891876457] [2021-10-15 19:51:52,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891876457] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:51:52,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:51:52,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:51:52,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811262717] [2021-10-15 19:51:52,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:51:52,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:51:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:51:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:51:52,191 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:51:52,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 370 transitions, 740 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 19:51:52,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:51:52,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:51:52,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:51:53,197 INFO L129 PetriNetUnfolder]: 181/545 cut-off events. [2021-10-15 19:51:53,198 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:51:53,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 545 events. 181/545 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 764 event pairs, 0 based on Foata normal form. 61/365 useless extension candidates. Maximal degree in co-relation 3. Up to 314 conditions per place. [2021-10-15 19:51:53,209 INFO L132 encePairwiseOnDemand]: 172/375 looper letters, 353 selfloop transitions, 80 changer transitions 81/540 dead transitions. [2021-10-15 19:51:53,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 540 transitions, 2108 flow [2021-10-15 19:51:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:51:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:51:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 703 transitions. [2021-10-15 19:51:53,236 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6248888888888889 [2021-10-15 19:51:53,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 703 transitions. [2021-10-15 19:51:53,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 703 transitions. [2021-10-15 19:51:53,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:51:53,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 703 transitions. [2021-10-15 19:51:53,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 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 19:51:53,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:53,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:53,273 INFO L186 Difference]: Start difference. First operand has 224 places, 370 transitions, 740 flow. Second operand 3 states and 703 transitions. [2021-10-15 19:51:53,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 540 transitions, 2108 flow [2021-10-15 19:51:53,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 540 transitions, 2108 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:51:53,301 INFO L242 Difference]: Finished difference. Result has 228 places, 323 transitions, 1118 flow [2021-10-15 19:51:53,304 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1118, PETRI_PLACES=228, PETRI_TRANSITIONS=323} [2021-10-15 19:51:53,306 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, 4 predicate places. [2021-10-15 19:51:53,306 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 323 transitions, 1118 flow [2021-10-15 19:51:53,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 19:51:53,307 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:51:53,309 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:51:53,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:51:53,310 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:51:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:51:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1307565321, now seen corresponding path program 1 times [2021-10-15 19:51:53,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:51:53,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933708518] [2021-10-15 19:51:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:51:53,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:51:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:51:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:51:53,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:51:53,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933708518] [2021-10-15 19:51:53,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933708518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:51:53,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:51:53,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:51:53,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571372637] [2021-10-15 19:51:53,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:51:53,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:51:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:51:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:51:53,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 375 [2021-10-15 19:51:53,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 323 transitions, 1118 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 19:51:53,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:51:53,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 375 [2021-10-15 19:51:53,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:51:54,248 INFO L129 PetriNetUnfolder]: 283/881 cut-off events. [2021-10-15 19:51:54,248 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2021-10-15 19:51:54,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 881 events. 283/881 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2071 event pairs, 0 based on Foata normal form. 30/902 useless extension candidates. Maximal degree in co-relation 957. Up to 453 conditions per place. [2021-10-15 19:51:54,259 INFO L132 encePairwiseOnDemand]: 333/375 looper letters, 509 selfloop transitions, 53 changer transitions 0/584 dead transitions. [2021-10-15 19:51:54,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 584 transitions, 3130 flow [2021-10-15 19:51:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:51:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:51:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2021-10-15 19:51:54,265 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.464 [2021-10-15 19:51:54,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2021-10-15 19:51:54,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2021-10-15 19:51:54,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:51:54,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2021-10-15 19:51:54,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 19:51:54,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:54,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:54,279 INFO L186 Difference]: Start difference. First operand has 228 places, 323 transitions, 1118 flow. Second operand 3 states and 522 transitions. [2021-10-15 19:51:54,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 584 transitions, 3130 flow [2021-10-15 19:51:54,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 584 transitions, 2848 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:51:54,325 INFO L242 Difference]: Finished difference. Result has 169 places, 357 transitions, 1359 flow [2021-10-15 19:51:54,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=169, PETRI_TRANSITIONS=357} [2021-10-15 19:51:54,334 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -55 predicate places. [2021-10-15 19:51:54,335 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 357 transitions, 1359 flow [2021-10-15 19:51:54,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 19:51:54,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:51:54,336 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:51:54,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:51:54,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:51:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:51:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1512496930, now seen corresponding path program 1 times [2021-10-15 19:51:54,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:51:54,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118709842] [2021-10-15 19:51:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:51:54,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:51:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:51:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:51:54,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:51:54,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118709842] [2021-10-15 19:51:54,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118709842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:51:54,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:51:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:51:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994534246] [2021-10-15 19:51:54,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:51:54,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:51:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:51:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:51:54,465 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:51:54,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 357 transitions, 1359 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 19:51:54,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:51:54,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:51:54,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:51:54,894 INFO L129 PetriNetUnfolder]: 189/635 cut-off events. [2021-10-15 19:51:54,894 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2021-10-15 19:51:54,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 635 events. 189/635 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1100 event pairs, 0 based on Foata normal form. 30/661 useless extension candidates. Maximal degree in co-relation 493. Up to 592 conditions per place. [2021-10-15 19:51:54,900 INFO L132 encePairwiseOnDemand]: 359/375 looper letters, 275 selfloop transitions, 1 changer transitions 0/299 dead transitions. [2021-10-15 19:51:54,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 299 transitions, 1559 flow [2021-10-15 19:51:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:51:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:51:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2021-10-15 19:51:54,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.26755555555555555 [2021-10-15 19:51:54,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2021-10-15 19:51:54,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2021-10-15 19:51:54,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:51:54,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2021-10-15 19:51:54,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 19:51:54,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:54,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:54,912 INFO L186 Difference]: Start difference. First operand has 169 places, 357 transitions, 1359 flow. Second operand 3 states and 301 transitions. [2021-10-15 19:51:54,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 299 transitions, 1559 flow [2021-10-15 19:51:54,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 299 transitions, 1508 flow, removed 16 selfloop flow, removed 1 redundant places. [2021-10-15 19:51:54,930 INFO L242 Difference]: Finished difference. Result has 162 places, 299 transitions, 958 flow [2021-10-15 19:51:54,931 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=958, PETRI_PLACES=162, PETRI_TRANSITIONS=299} [2021-10-15 19:51:54,931 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -62 predicate places. [2021-10-15 19:51:54,932 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 299 transitions, 958 flow [2021-10-15 19:51:54,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 19:51:54,932 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:51:54,933 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:51:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:51:54,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:51:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:51:54,935 INFO L82 PathProgramCache]: Analyzing trace with hash -661756398, now seen corresponding path program 1 times [2021-10-15 19:51:54,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:51:54,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743285238] [2021-10-15 19:51:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:51:54,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:51:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:51:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:51:55,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:51:55,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743285238] [2021-10-15 19:51:55,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743285238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:51:55,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:51:55,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:51:55,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307208420] [2021-10-15 19:51:55,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:51:55,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:51:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:51:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:51:55,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:51:55,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 299 transitions, 958 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 19:51:55,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:51:55,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:51:55,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:51:55,747 INFO L129 PetriNetUnfolder]: 328/1211 cut-off events. [2021-10-15 19:51:55,747 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-15 19:51:55,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 1211 events. 328/1211 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4102 event pairs, 0 based on Foata normal form. 47/1252 useless extension candidates. Maximal degree in co-relation 2698. Up to 595 conditions per place. [2021-10-15 19:51:55,757 INFO L132 encePairwiseOnDemand]: 323/375 looper letters, 422 selfloop transitions, 89 changer transitions 0/537 dead transitions. [2021-10-15 19:51:55,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 537 transitions, 2732 flow [2021-10-15 19:51:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:51:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:51:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 19:51:55,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43644444444444447 [2021-10-15 19:51:55,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 19:51:55,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 19:51:55,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:51:55,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 19:51:55,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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 19:51:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:55,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:55,773 INFO L186 Difference]: Start difference. First operand has 162 places, 299 transitions, 958 flow. Second operand 3 states and 491 transitions. [2021-10-15 19:51:55,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 537 transitions, 2732 flow [2021-10-15 19:51:55,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 537 transitions, 2731 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:51:55,795 INFO L242 Difference]: Finished difference. Result has 165 places, 377 transitions, 1877 flow [2021-10-15 19:51:55,796 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1877, PETRI_PLACES=165, PETRI_TRANSITIONS=377} [2021-10-15 19:51:55,796 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -59 predicate places. [2021-10-15 19:51:55,796 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 377 transitions, 1877 flow [2021-10-15 19:51:55,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 19:51:55,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:51:55,797 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:51:55,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:51:55,798 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:51:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:51:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash -612453497, now seen corresponding path program 1 times [2021-10-15 19:51:55,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:51:55,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669781815] [2021-10-15 19:51:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:51:55,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:51:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:51:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:51:55,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:51:55,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669781815] [2021-10-15 19:51:55,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669781815] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:51:55,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:51:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:51:55,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488982078] [2021-10-15 19:51:55,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:51:55,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:51:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:51:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:51:55,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:51:55,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 377 transitions, 1877 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 19:51:55,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:51:55,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:51:55,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:51:56,927 INFO L129 PetriNetUnfolder]: 429/1874 cut-off events. [2021-10-15 19:51:56,927 INFO L130 PetriNetUnfolder]: For 1042/1042 co-relation queries the response was YES. [2021-10-15 19:51:56,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4664 conditions, 1874 events. 429/1874 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8607 event pairs, 0 based on Foata normal form. 109/1983 useless extension candidates. Maximal degree in co-relation 4651. Up to 960 conditions per place. [2021-10-15 19:51:56,942 INFO L132 encePairwiseOnDemand]: 308/375 looper letters, 427 selfloop transitions, 135 changer transitions 0/576 dead transitions. [2021-10-15 19:51:56,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 576 transitions, 3723 flow [2021-10-15 19:51:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:51:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:51:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2021-10-15 19:51:56,946 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42044444444444445 [2021-10-15 19:51:56,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2021-10-15 19:51:56,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2021-10-15 19:51:56,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:51:56,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2021-10-15 19:51:56,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 19:51:56,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:56,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:56,956 INFO L186 Difference]: Start difference. First operand has 165 places, 377 transitions, 1877 flow. Second operand 3 states and 473 transitions. [2021-10-15 19:51:56,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 576 transitions, 3723 flow [2021-10-15 19:51:56,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 576 transitions, 3507 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:51:56,988 INFO L242 Difference]: Finished difference. Result has 167 places, 440 transitions, 2887 flow [2021-10-15 19:51:56,989 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2887, PETRI_PLACES=167, PETRI_TRANSITIONS=440} [2021-10-15 19:51:56,990 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -57 predicate places. [2021-10-15 19:51:56,990 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 440 transitions, 2887 flow [2021-10-15 19:51:56,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 19:51:56,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:51:56,991 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:51:56,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:51:56,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:51:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:51:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 519114652, now seen corresponding path program 1 times [2021-10-15 19:51:56,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:51:56,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586982165] [2021-10-15 19:51:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:51:56,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:51:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:51:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:51:57,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:51:57,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586982165] [2021-10-15 19:51:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586982165] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:51:57,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:51:57,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:51:57,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018196924] [2021-10-15 19:51:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:51:57,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:51:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:51:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:51:57,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:51:57,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 440 transitions, 2887 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 19:51:57,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:51:57,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:51:57,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:51:58,388 INFO L129 PetriNetUnfolder]: 576/3140 cut-off events. [2021-10-15 19:51:58,389 INFO L130 PetriNetUnfolder]: For 3208/3208 co-relation queries the response was YES. [2021-10-15 19:51:58,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8042 conditions, 3140 events. 576/3140 cut-off events. For 3208/3208 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 17585 event pairs, 0 based on Foata normal form. 185/3325 useless extension candidates. Maximal degree in co-relation 8027. Up to 1821 conditions per place. [2021-10-15 19:51:58,413 INFO L132 encePairwiseOnDemand]: 307/375 looper letters, 453 selfloop transitions, 200 changer transitions 0/672 dead transitions. [2021-10-15 19:51:58,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 672 transitions, 5205 flow [2021-10-15 19:51:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:51:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:51:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2021-10-15 19:51:58,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43377777777777776 [2021-10-15 19:51:58,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2021-10-15 19:51:58,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2021-10-15 19:51:58,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:51:58,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2021-10-15 19:51:58,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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 19:51:58,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:58,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:51:58,462 INFO L186 Difference]: Start difference. First operand has 167 places, 440 transitions, 2887 flow. Second operand 3 states and 488 transitions. [2021-10-15 19:51:58,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 672 transitions, 5205 flow [2021-10-15 19:51:58,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 672 transitions, 4863 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:51:58,505 INFO L242 Difference]: Finished difference. Result has 169 places, 536 transitions, 4413 flow [2021-10-15 19:51:58,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4413, PETRI_PLACES=169, PETRI_TRANSITIONS=536} [2021-10-15 19:51:58,506 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -55 predicate places. [2021-10-15 19:51:58,506 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 536 transitions, 4413 flow [2021-10-15 19:51:58,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 19:51:58,507 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:51:58,508 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:51:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:51:58,509 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:51:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:51:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash -671558766, now seen corresponding path program 1 times [2021-10-15 19:51:58,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:51:58,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14895701] [2021-10-15 19:51:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:51:58,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:51:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:51:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 19:51:58,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:51:58,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14895701] [2021-10-15 19:51:58,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14895701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:51:58,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:51:58,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:51:58,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433357385] [2021-10-15 19:51:58,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:51:58,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:51:58,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:51:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:51:58,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:51:58,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 536 transitions, 4413 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 19:51:58,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:51:58,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:51:58,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:52:00,003 INFO L129 PetriNetUnfolder]: 407/2823 cut-off events. [2021-10-15 19:52:00,003 INFO L130 PetriNetUnfolder]: For 4135/4135 co-relation queries the response was YES. [2021-10-15 19:52:00,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7159 conditions, 2823 events. 407/2823 cut-off events. For 4135/4135 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15892 event pairs, 0 based on Foata normal form. 134/2957 useless extension candidates. Maximal degree in co-relation 7142. Up to 1359 conditions per place. [2021-10-15 19:52:00,023 INFO L132 encePairwiseOnDemand]: 324/375 looper letters, 442 selfloop transitions, 119 changer transitions 0/587 dead transitions. [2021-10-15 19:52:00,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 587 transitions, 4973 flow [2021-10-15 19:52:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:52:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:52:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2021-10-15 19:52:00,027 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42044444444444445 [2021-10-15 19:52:00,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2021-10-15 19:52:00,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2021-10-15 19:52:00,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:52:00,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2021-10-15 19:52:00,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 19:52:00,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:00,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:00,036 INFO L186 Difference]: Start difference. First operand has 169 places, 536 transitions, 4413 flow. Second operand 3 states and 473 transitions. [2021-10-15 19:52:00,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 587 transitions, 4973 flow [2021-10-15 19:52:00,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 587 transitions, 4657 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:52:00,076 INFO L242 Difference]: Finished difference. Result has 170 places, 457 transitions, 3662 flow [2021-10-15 19:52:00,077 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3662, PETRI_PLACES=170, PETRI_TRANSITIONS=457} [2021-10-15 19:52:00,078 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -54 predicate places. [2021-10-15 19:52:00,078 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 457 transitions, 3662 flow [2021-10-15 19:52:00,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 19:52:00,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:52:00,079 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:52:00,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:52:00,080 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:52:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:00,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1585632305, now seen corresponding path program 1 times [2021-10-15 19:52:00,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:00,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487176127] [2021-10-15 19:52:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:00,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:52:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:52:00,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:52:00,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487176127] [2021-10-15 19:52:00,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487176127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:52:00,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393161823] [2021-10-15 19:52:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:00,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:52:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:52:00,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:52:00,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:52:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:52:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:52:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:52:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:52:01,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393161823] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:52:01,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:52:01,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:52:01,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551796716] [2021-10-15 19:52:01,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:52:01,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:52:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:52:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:52:01,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:52:01,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 457 transitions, 3662 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 19:52:01,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:52:01,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:52:01,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:52:02,321 INFO L129 PetriNetUnfolder]: 289/2703 cut-off events. [2021-10-15 19:52:02,321 INFO L130 PetriNetUnfolder]: For 3491/3491 co-relation queries the response was YES. [2021-10-15 19:52:02,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6644 conditions, 2703 events. 289/2703 cut-off events. For 3491/3491 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15742 event pairs, 0 based on Foata normal form. 118/2821 useless extension candidates. Maximal degree in co-relation 6627. Up to 1584 conditions per place. [2021-10-15 19:52:02,338 INFO L132 encePairwiseOnDemand]: 319/375 looper letters, 404 selfloop transitions, 84 changer transitions 0/506 dead transitions. [2021-10-15 19:52:02,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 506 transitions, 3979 flow [2021-10-15 19:52:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:52:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:52:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2021-10-15 19:52:02,342 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41155555555555556 [2021-10-15 19:52:02,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2021-10-15 19:52:02,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2021-10-15 19:52:02,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:52:02,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2021-10-15 19:52:02,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 19:52:02,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:02,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:02,349 INFO L186 Difference]: Start difference. First operand has 170 places, 457 transitions, 3662 flow. Second operand 3 states and 463 transitions. [2021-10-15 19:52:02,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 506 transitions, 3979 flow [2021-10-15 19:52:02,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 506 transitions, 3891 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:52:02,376 INFO L242 Difference]: Finished difference. Result has 171 places, 370 transitions, 2811 flow [2021-10-15 19:52:02,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2811, PETRI_PLACES=171, PETRI_TRANSITIONS=370} [2021-10-15 19:52:02,377 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -53 predicate places. [2021-10-15 19:52:02,377 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 370 transitions, 2811 flow [2021-10-15 19:52:02,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 19:52:02,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:52:02,379 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:52:02,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:52:02,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:52:02,604 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:52:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash 412384218, now seen corresponding path program 1 times [2021-10-15 19:52:02,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:02,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676729698] [2021-10-15 19:52:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:02,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:52:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:52:02,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:52:02,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676729698] [2021-10-15 19:52:02,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676729698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:52:02,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:52:02,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:52:02,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875521595] [2021-10-15 19:52:02,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:52:02,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:52:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:52:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:52:02,731 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:52:02,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 370 transitions, 2811 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 19:52:02,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:52:02,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:52:02,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:52:03,981 INFO L129 PetriNetUnfolder]: 214/2485 cut-off events. [2021-10-15 19:52:03,982 INFO L130 PetriNetUnfolder]: For 2492/2492 co-relation queries the response was YES. [2021-10-15 19:52:03,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5934 conditions, 2485 events. 214/2485 cut-off events. For 2492/2492 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14359 event pairs, 0 based on Foata normal form. 65/2550 useless extension candidates. Maximal degree in co-relation 5917. Up to 1820 conditions per place. [2021-10-15 19:52:03,996 INFO L132 encePairwiseOnDemand]: 323/375 looper letters, 381 selfloop transitions, 2 changer transitions 24/430 dead transitions. [2021-10-15 19:52:03,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 430 transitions, 3093 flow [2021-10-15 19:52:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:52:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:52:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2021-10-15 19:52:04,000 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41955555555555557 [2021-10-15 19:52:04,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2021-10-15 19:52:04,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2021-10-15 19:52:04,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:52:04,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2021-10-15 19:52:04,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 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 19:52:04,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:04,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:04,008 INFO L186 Difference]: Start difference. First operand has 171 places, 370 transitions, 2811 flow. Second operand 3 states and 472 transitions. [2021-10-15 19:52:04,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 430 transitions, 3093 flow [2021-10-15 19:52:04,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 430 transitions, 3035 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:52:04,030 INFO L242 Difference]: Finished difference. Result has 172 places, 270 transitions, 1621 flow [2021-10-15 19:52:04,031 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1621, PETRI_PLACES=172, PETRI_TRANSITIONS=270} [2021-10-15 19:52:04,032 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -52 predicate places. [2021-10-15 19:52:04,032 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 270 transitions, 1621 flow [2021-10-15 19:52:04,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 19:52:04,033 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:52:04,033 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:52:04,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:52:04,034 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:52:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash -864290925, now seen corresponding path program 1 times [2021-10-15 19:52:04,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:04,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031365007] [2021-10-15 19:52:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:04,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:52:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-15 19:52:04,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:52:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031365007] [2021-10-15 19:52:04,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031365007] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:52:04,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:52:04,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:52:04,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361367087] [2021-10-15 19:52:04,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:52:04,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:52:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:52:04,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:52:04,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:52:04,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 270 transitions, 1621 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 19:52:04,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:52:04,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:52:04,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:52:05,192 INFO L129 PetriNetUnfolder]: 191/2741 cut-off events. [2021-10-15 19:52:05,192 INFO L130 PetriNetUnfolder]: For 2125/2125 co-relation queries the response was YES. [2021-10-15 19:52:05,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6277 conditions, 2741 events. 191/2741 cut-off events. For 2125/2125 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15651 event pairs, 0 based on Foata normal form. 57/2798 useless extension candidates. Maximal degree in co-relation 6260. Up to 1925 conditions per place. [2021-10-15 19:52:05,207 INFO L132 encePairwiseOnDemand]: 337/375 looper letters, 0 selfloop transitions, 0 changer transitions 414/414 dead transitions. [2021-10-15 19:52:05,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 414 transitions, 2808 flow [2021-10-15 19:52:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:52:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:52:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2021-10-15 19:52:05,211 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38755555555555554 [2021-10-15 19:52:05,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2021-10-15 19:52:05,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2021-10-15 19:52:05,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:52:05,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2021-10-15 19:52:05,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 19:52:05,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:05,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 19:52:05,218 INFO L186 Difference]: Start difference. First operand has 172 places, 270 transitions, 1621 flow. Second operand 3 states and 436 transitions. [2021-10-15 19:52:05,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 414 transitions, 2808 flow [2021-10-15 19:52:05,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 414 transitions, 2671 flow, removed 66 selfloop flow, removed 2 redundant places. [2021-10-15 19:52:05,236 INFO L242 Difference]: Finished difference. Result has 170 places, 0 transitions, 0 flow [2021-10-15 19:52:05,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=170, PETRI_TRANSITIONS=0} [2021-10-15 19:52:05,238 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -54 predicate places. [2021-10-15 19:52:05,238 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 0 transitions, 0 flow [2021-10-15 19:52:05,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 19:52:05,241 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:52:05,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:52:05,247 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:52:05,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:52:05 BoogieIcfgContainer [2021-10-15 19:52:05,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:52:05,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:52:05,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:52:05,258 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:52:05,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:51:51" (3/4) ... [2021-10-15 19:52:05,261 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:52:05,294 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:52:05,296 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:52:05,298 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:52:05,299 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:52:05,467 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:52:05,467 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:52:05,469 INFO L168 Benchmark]: Toolchain (without parser) took 16334.44 ms. Allocated memory was 94.4 MB in the beginning and 255.9 MB in the end (delta: 161.5 MB). Free memory was 57.5 MB in the beginning and 140.4 MB in the end (delta: -82.9 MB). Peak memory consumption was 77.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:05,470 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 65.2 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:52:05,471 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.26 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 57.3 MB in the beginning and 78.0 MB in the end (delta: -20.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:05,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 120.49 ms. Allocated memory is still 119.5 MB. Free memory was 78.0 MB in the beginning and 72.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:05,472 INFO L168 Benchmark]: Boogie Preprocessor took 96.44 ms. Allocated memory is still 119.5 MB. Free memory was 72.3 MB in the beginning and 68.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:05,472 INFO L168 Benchmark]: RCFGBuilder took 1393.06 ms. Allocated memory is still 119.5 MB. Free memory was 68.2 MB in the beginning and 68.5 MB in the end (delta: -349.3 kB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:05,473 INFO L168 Benchmark]: TraceAbstraction took 13869.62 ms. Allocated memory was 119.5 MB in the beginning and 255.9 MB in the end (delta: 136.3 MB). Free memory was 67.9 MB in the beginning and 154.3 MB in the end (delta: -86.4 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:05,473 INFO L168 Benchmark]: Witness Printer took 210.44 ms. Allocated memory is still 255.9 MB. Free memory was 154.3 MB in the beginning and 140.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:05,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 65.2 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 637.26 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 57.3 MB in the beginning and 78.0 MB in the end (delta: -20.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 120.49 ms. Allocated memory is still 119.5 MB. Free memory was 78.0 MB in the beginning and 72.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 96.44 ms. Allocated memory is still 119.5 MB. Free memory was 72.3 MB in the beginning and 68.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1393.06 ms. Allocated memory is still 119.5 MB. Free memory was 68.2 MB in the beginning and 68.5 MB in the end (delta: -349.3 kB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13869.62 ms. Allocated memory was 119.5 MB in the beginning and 255.9 MB in the end (delta: 136.3 MB). Free memory was 67.9 MB in the beginning and 154.3 MB in the end (delta: -86.4 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. * Witness Printer took 210.44 ms. Allocated memory is still 255.9 MB. Free memory was 154.3 MB in the beginning and 140.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 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: 479]: 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, 227 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 27.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13793.0ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 11040.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 170.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 908 SDtfs, 1286 SDslu, 0 SDs, 0 SdLazy, 3385 SolverSat, 563 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3737.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4413occurred in iteration=6, InterpolantAutomatonStates: 30, 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: 129.3ms SsaConstructionTime, 391.1ms SatisfiabilityAnalysisTime, 1457.5ms InterpolantComputationTime, 1453 NumberOfCodeBlocks, 1453 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1442 ConstructedInterpolants, 0 QuantifiedInterpolants, 3990 SizeOfPredicates, 0 NumberOfNonLiveVariables, 268 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 11 InterpolantComputations, 10 PerfectInterpolantSequences, 439/455 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 19:52:05,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d088621-26d7-4f8e-8533-004b27310380/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...