./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/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_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/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_cbcbdf96-5f32-4efe-9f87-01712186bcca/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 a740385338160f890b2c38dad2319e0f12875ae0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 20:24:14,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:24:14,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:24:14,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:24:14,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:24:14,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:24:14,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:24:14,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:24:14,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:24:14,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:24:14,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:24:14,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:24:14,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:24:14,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:24:14,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:24:14,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:24:14,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:24:14,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:24:14,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:24:14,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:24:14,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:24:14,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:24:14,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:24:14,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:24:14,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:24:14,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:24:14,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:24:14,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:24:14,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:24:14,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:24:14,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:24:14,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:24:14,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:24:14,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:24:14,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:24:14,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:24:14,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:24:14,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:24:14,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:24:14,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:24:14,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:24:14,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:24:14,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:24:14,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:24:14,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:24:14,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:24:14,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:24:14,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:24:14,680 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:24:14,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:24:14,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:24:14,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:24:14,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:24:14,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:24:14,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:24:14,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:24:14,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:24:14,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:24:14,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:24:14,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:24:14,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:24:14,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:24:14,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:24:14,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:24:14,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:14,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:24:14,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:24:14,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:24:14,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:24:14,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:24:14,687 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:24:14,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:24:14,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:24:14,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:24:14,688 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_cbcbdf96-5f32-4efe-9f87-01712186bcca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a740385338160f890b2c38dad2319e0f12875ae0 [2021-10-15 20:24:14,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:24:15,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:24:15,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:24:15,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:24:15,017 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:24:15,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-10-15 20:24:15,097 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/data/28013988d/14507faa632748cbb82e61e93010172b/FLAG03145ffeb [2021-10-15 20:24:15,883 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:24:15,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-10-15 20:24:15,901 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/data/28013988d/14507faa632748cbb82e61e93010172b/FLAG03145ffeb [2021-10-15 20:24:16,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/data/28013988d/14507faa632748cbb82e61e93010172b [2021-10-15 20:24:16,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:24:16,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:24:16,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:16,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:24:16,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:24:16,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:16,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2696e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16, skipping insertion in model container [2021-10-15 20:24:16,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:16,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:24:16,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:24:16,408 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_cbcbdf96-5f32-4efe-9f87-01712186bcca/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-10-15 20:24:16,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:16,783 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:24:16,808 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_cbcbdf96-5f32-4efe-9f87-01712186bcca/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-10-15 20:24:16,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:16,952 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:24:16,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16 WrapperNode [2021-10-15 20:24:16,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:16,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:16,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:24:16,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:24:16,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:17,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:24:17,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:24:17,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:24:17,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:24:17,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:24:17,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:24:17,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:24:17,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (1/1) ... [2021-10-15 20:24:17,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:17,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:24:17,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:24:17,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:24:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-10-15 20:24:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:24:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:24:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:24:17,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:24:18,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:24:18,745 INFO L299 CfgBuilder]: Removed 127 assume(true) statements. [2021-10-15 20:24:18,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:18 BoogieIcfgContainer [2021-10-15 20:24:18,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:24:18,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:24:18,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:24:18,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:24:18,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:24:16" (1/3) ... [2021-10-15 20:24:18,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a207611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:18, skipping insertion in model container [2021-10-15 20:24:18,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:16" (2/3) ... [2021-10-15 20:24:18,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a207611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:18, skipping insertion in model container [2021-10-15 20:24:18,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:18" (3/3) ... [2021-10-15 20:24:18,756 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product05.cil.c [2021-10-15 20:24:18,762 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:24:18,762 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:24:18,845 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:24:18,850 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:24:18,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:24:18,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 216 transitions, 432 flow [2021-10-15 20:24:18,919 INFO L129 PetriNetUnfolder]: 83/216 cut-off events. [2021-10-15 20:24:18,919 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:18,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 216 events. 83/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-10-15 20:24:18,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 216 transitions, 432 flow [2021-10-15 20:24:18,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 190 transitions, 380 flow [2021-10-15 20:24:18,944 INFO L129 PetriNetUnfolder]: 54/138 cut-off events. [2021-10-15 20:24:18,945 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:18,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:18,946 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] [2021-10-15 20:24:18,946 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:18,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1721357046, now seen corresponding path program 1 times [2021-10-15 20:24:18,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:18,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535816786] [2021-10-15 20:24:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:18,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:19,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:19,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535816786] [2021-10-15 20:24:19,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535816786] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:19,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:19,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:24:19,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792293889] [2021-10-15 20:24:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:24:19,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:24:19,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:24:19,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 216 [2021-10-15 20:24:19,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 190 transitions, 380 flow. Second operand has 2 states, 2 states have (on average 212.5) internal successors, (425), 2 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:19,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 216 [2021-10-15 20:24:19,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:19,424 INFO L129 PetriNetUnfolder]: 70/187 cut-off events. [2021-10-15 20:24:19,425 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:19,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 187 events. 70/187 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 278 event pairs, 0 based on Foata normal form. 2/118 useless extension candidates. Maximal degree in co-relation 187. Up to 12 conditions per place. [2021-10-15 20:24:19,428 INFO L132 encePairwiseOnDemand]: 213/216 looper letters, 0 selfloop transitions, 0 changer transitions 0/187 dead transitions. [2021-10-15 20:24:19,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 187 transitions, 374 flow [2021-10-15 20:24:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:24:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:24:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 427 transitions. [2021-10-15 20:24:19,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9884259259259259 [2021-10-15 20:24:19,450 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 427 transitions. [2021-10-15 20:24:19,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 427 transitions. [2021-10-15 20:24:19,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:19,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 427 transitions. [2021-10-15 20:24:19,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,475 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,477 INFO L186 Difference]: Start difference. First operand has 118 places, 190 transitions, 380 flow. Second operand 2 states and 427 transitions. [2021-10-15 20:24:19,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 187 transitions, 374 flow [2021-10-15 20:24:19,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:19,493 INFO L242 Difference]: Finished difference. Result has 119 places, 187 transitions, 374 flow [2021-10-15 20:24:19,495 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=374, PETRI_PLACES=119, PETRI_TRANSITIONS=187} [2021-10-15 20:24:19,496 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2021-10-15 20:24:19,497 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 187 transitions, 374 flow [2021-10-15 20:24:19,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 212.5) internal successors, (425), 2 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:19,498 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] [2021-10-15 20:24:19,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:24:19,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:19,500 INFO L82 PathProgramCache]: Analyzing trace with hash -122239248, now seen corresponding path program 1 times [2021-10-15 20:24:19,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:19,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639303646] [2021-10-15 20:24:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:19,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:19,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:19,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639303646] [2021-10-15 20:24:19,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639303646] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:19,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:19,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:19,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838215975] [2021-10-15 20:24:19,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:19,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:19,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 216 [2021-10-15 20:24:19,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 187 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:19,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 216 [2021-10-15 20:24:19,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:19,790 INFO L129 PetriNetUnfolder]: 127/346 cut-off events. [2021-10-15 20:24:19,790 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:19,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 346 events. 127/346 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 939 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 364. Up to 24 conditions per place. [2021-10-15 20:24:19,793 INFO L132 encePairwiseOnDemand]: 210/216 looper letters, 14 selfloop transitions, 4 changer transitions 0/184 dead transitions. [2021-10-15 20:24:19,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 184 transitions, 404 flow [2021-10-15 20:24:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2021-10-15 20:24:19,797 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9151234567901234 [2021-10-15 20:24:19,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2021-10-15 20:24:19,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2021-10-15 20:24:19,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:19,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2021-10-15 20:24:19,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,806 INFO L186 Difference]: Start difference. First operand has 119 places, 187 transitions, 374 flow. Second operand 3 states and 593 transitions. [2021-10-15 20:24:19,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 184 transitions, 404 flow [2021-10-15 20:24:19,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:19,827 INFO L242 Difference]: Finished difference. Result has 121 places, 184 transitions, 382 flow [2021-10-15 20:24:19,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=121, PETRI_TRANSITIONS=184} [2021-10-15 20:24:19,828 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2021-10-15 20:24:19,828 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 184 transitions, 382 flow [2021-10-15 20:24:19,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:19,829 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] [2021-10-15 20:24:19,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:24:19,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2107249571, now seen corresponding path program 1 times [2021-10-15 20:24:19,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:19,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142146338] [2021-10-15 20:24:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:19,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:19,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:19,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142146338] [2021-10-15 20:24:19,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142146338] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:19,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:19,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:19,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595855601] [2021-10-15 20:24:19,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:19,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:19,959 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 216 [2021-10-15 20:24:19,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 184 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:19,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:19,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 216 [2021-10-15 20:24:19,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:20,015 INFO L129 PetriNetUnfolder]: 64/182 cut-off events. [2021-10-15 20:24:20,015 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 20:24:20,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 182 events. 64/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 269 event pairs, 0 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2021-10-15 20:24:20,018 INFO L132 encePairwiseOnDemand]: 210/216 looper letters, 13 selfloop transitions, 3 changer transitions 0/182 dead transitions. [2021-10-15 20:24:20,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 182 transitions, 410 flow [2021-10-15 20:24:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2021-10-15 20:24:20,021 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9120370370370371 [2021-10-15 20:24:20,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2021-10-15 20:24:20,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2021-10-15 20:24:20,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:20,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2021-10-15 20:24:20,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,032 INFO L186 Difference]: Start difference. First operand has 121 places, 184 transitions, 382 flow. Second operand 3 states and 591 transitions. [2021-10-15 20:24:20,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 182 transitions, 410 flow [2021-10-15 20:24:20,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 182 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:20,044 INFO L242 Difference]: Finished difference. Result has 123 places, 182 transitions, 385 flow [2021-10-15 20:24:20,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=123, PETRI_TRANSITIONS=182} [2021-10-15 20:24:20,045 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 5 predicate places. [2021-10-15 20:24:20,045 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 182 transitions, 385 flow [2021-10-15 20:24:20,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,046 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:20,046 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] [2021-10-15 20:24:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:24:20,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:20,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1032935230, now seen corresponding path program 1 times [2021-10-15 20:24:20,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:20,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053621998] [2021-10-15 20:24:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:20,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:20,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:20,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053621998] [2021-10-15 20:24:20,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053621998] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:20,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:20,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:20,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231370519] [2021-10-15 20:24:20,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:20,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:20,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 216 [2021-10-15 20:24:20,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 182 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:20,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 216 [2021-10-15 20:24:20,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:20,217 INFO L129 PetriNetUnfolder]: 64/185 cut-off events. [2021-10-15 20:24:20,217 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:24:20,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 185 events. 64/185 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 256 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 201. Up to 12 conditions per place. [2021-10-15 20:24:20,220 INFO L132 encePairwiseOnDemand]: 213/216 looper letters, 4 selfloop transitions, 2 changer transitions 0/184 dead transitions. [2021-10-15 20:24:20,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 184 transitions, 401 flow [2021-10-15 20:24:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2021-10-15 20:24:20,224 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9737654320987654 [2021-10-15 20:24:20,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2021-10-15 20:24:20,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2021-10-15 20:24:20,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:20,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2021-10-15 20:24:20,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,231 INFO L186 Difference]: Start difference. First operand has 123 places, 182 transitions, 385 flow. Second operand 3 states and 631 transitions. [2021-10-15 20:24:20,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 184 transitions, 401 flow [2021-10-15 20:24:20,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 184 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:20,238 INFO L242 Difference]: Finished difference. Result has 125 places, 183 transitions, 394 flow [2021-10-15 20:24:20,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=125, PETRI_TRANSITIONS=183} [2021-10-15 20:24:20,238 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 7 predicate places. [2021-10-15 20:24:20,239 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 183 transitions, 394 flow [2021-10-15 20:24:20,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:20,240 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:24:20,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:24:20,241 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1719269101, now seen corresponding path program 1 times [2021-10-15 20:24:20,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:20,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647663022] [2021-10-15 20:24:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:20,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:20,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:20,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647663022] [2021-10-15 20:24:20,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647663022] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:24:20,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744532921] [2021-10-15 20:24:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:20,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:24:20,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:24:20,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:24:20,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:24:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:24:20,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:24:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:20,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744532921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:24:20,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:24:20,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:24:20,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10188022] [2021-10-15 20:24:20,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:24:20,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:24:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:24:20,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 216 [2021-10-15 20:24:20,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 183 transitions, 394 flow. Second operand has 5 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:20,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:20,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 216 [2021-10-15 20:24:20,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:20,993 INFO L129 PetriNetUnfolder]: 123/344 cut-off events. [2021-10-15 20:24:20,993 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 20:24:20,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 344 events. 123/344 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 802 event pairs, 0 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 367. Up to 23 conditions per place. [2021-10-15 20:24:20,996 INFO L132 encePairwiseOnDemand]: 213/216 looper letters, 5 selfloop transitions, 3 changer transitions 0/186 dead transitions. [2021-10-15 20:24:20,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 186 transitions, 418 flow [2021-10-15 20:24:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:24:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:24:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 841 transitions. [2021-10-15 20:24:21,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9733796296296297 [2021-10-15 20:24:21,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 841 transitions. [2021-10-15 20:24:21,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 841 transitions. [2021-10-15 20:24:21,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:21,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 841 transitions. [2021-10-15 20:24:21,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,013 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,013 INFO L186 Difference]: Start difference. First operand has 125 places, 183 transitions, 394 flow. Second operand 4 states and 841 transitions. [2021-10-15 20:24:21,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 186 transitions, 418 flow [2021-10-15 20:24:21,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 186 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:21,022 INFO L242 Difference]: Finished difference. Result has 128 places, 184 transitions, 408 flow [2021-10-15 20:24:21,022 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=408, PETRI_PLACES=128, PETRI_TRANSITIONS=184} [2021-10-15 20:24:21,023 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 10 predicate places. [2021-10-15 20:24:21,023 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 184 transitions, 408 flow [2021-10-15 20:24:21,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:21,025 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:21,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:24:21,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:24:21,241 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:21,241 INFO L82 PathProgramCache]: Analyzing trace with hash 196922526, now seen corresponding path program 2 times [2021-10-15 20:24:21,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:21,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17758229] [2021-10-15 20:24:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:21,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:21,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:21,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17758229] [2021-10-15 20:24:21,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17758229] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:21,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:21,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:24:21,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653432125] [2021-10-15 20:24:21,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:24:21,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:21,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:24:21,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:24:21,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 216 [2021-10-15 20:24:21,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 184 transitions, 408 flow. Second operand has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:21,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 216 [2021-10-15 20:24:21,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:21,413 INFO L129 PetriNetUnfolder]: 238/656 cut-off events. [2021-10-15 20:24:21,414 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 20:24:21,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 656 events. 238/656 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2373 event pairs, 0 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 695. Up to 43 conditions per place. [2021-10-15 20:24:21,419 INFO L132 encePairwiseOnDemand]: 211/216 looper letters, 5 selfloop transitions, 4 changer transitions 0/185 dead transitions. [2021-10-15 20:24:21,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 185 transitions, 428 flow [2021-10-15 20:24:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:24:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:24:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1025 transitions. [2021-10-15 20:24:21,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9490740740740741 [2021-10-15 20:24:21,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1025 transitions. [2021-10-15 20:24:21,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1025 transitions. [2021-10-15 20:24:21,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:21,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1025 transitions. [2021-10-15 20:24:21,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,436 INFO L186 Difference]: Start difference. First operand has 128 places, 184 transitions, 408 flow. Second operand 5 states and 1025 transitions. [2021-10-15 20:24:21,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 185 transitions, 428 flow [2021-10-15 20:24:21,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 185 transitions, 422 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:21,443 INFO L242 Difference]: Finished difference. Result has 132 places, 185 transitions, 421 flow [2021-10-15 20:24:21,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=132, PETRI_TRANSITIONS=185} [2021-10-15 20:24:21,444 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 14 predicate places. [2021-10-15 20:24:21,444 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 185 transitions, 421 flow [2021-10-15 20:24:21,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,445 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:21,446 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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 20:24:21,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:24:21,446 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash -867360645, now seen corresponding path program 1 times [2021-10-15 20:24:21,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:21,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022302287] [2021-10-15 20:24:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:21,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:24:21,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:21,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022302287] [2021-10-15 20:24:21,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022302287] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:21,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:21,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 20:24:21,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859659634] [2021-10-15 20:24:21,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:24:21,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:24:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:24:21,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 216 [2021-10-15 20:24:21,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 185 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 145.1) internal successors, (1451), 10 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:21,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:21,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 216 [2021-10-15 20:24:21,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:22,701 INFO L129 PetriNetUnfolder]: 802/2796 cut-off events. [2021-10-15 20:24:22,702 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 20:24:22,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3686 conditions, 2796 events. 802/2796 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 20933 event pairs, 0 based on Foata normal form. 0/2115 useless extension candidates. Maximal degree in co-relation 3676. Up to 240 conditions per place. [2021-10-15 20:24:22,719 INFO L132 encePairwiseOnDemand]: 191/216 looper letters, 149 selfloop transitions, 75 changer transitions 0/350 dead transitions. [2021-10-15 20:24:22,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 350 transitions, 1199 flow [2021-10-15 20:24:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-15 20:24:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-15 20:24:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3801 transitions. [2021-10-15 20:24:22,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7038888888888889 [2021-10-15 20:24:22,734 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3801 transitions. [2021-10-15 20:24:22,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3801 transitions. [2021-10-15 20:24:22,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:22,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3801 transitions. [2021-10-15 20:24:22,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 152.04) internal successors, (3801), 25 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:22,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 216.0) internal successors, (5616), 26 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:22,770 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 216.0) internal successors, (5616), 26 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:22,770 INFO L186 Difference]: Start difference. First operand has 132 places, 185 transitions, 421 flow. Second operand 25 states and 3801 transitions. [2021-10-15 20:24:22,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 350 transitions, 1199 flow [2021-10-15 20:24:22,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 350 transitions, 1196 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:22,781 INFO L242 Difference]: Finished difference. Result has 175 places, 249 transitions, 927 flow [2021-10-15 20:24:22,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=927, PETRI_PLACES=175, PETRI_TRANSITIONS=249} [2021-10-15 20:24:22,782 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 57 predicate places. [2021-10-15 20:24:22,782 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 249 transitions, 927 flow [2021-10-15 20:24:22,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 145.1) internal successors, (1451), 10 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:22,783 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:22,784 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:22,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:24:22,784 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1932642042, now seen corresponding path program 1 times [2021-10-15 20:24:22,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:22,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660438737] [2021-10-15 20:24:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:22,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:24:22,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:22,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660438737] [2021-10-15 20:24:22,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660438737] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:22,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:22,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:24:22,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497042053] [2021-10-15 20:24:22,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:24:22,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:22,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:24:22,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:24:22,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 216 [2021-10-15 20:24:22,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 249 transitions, 927 flow. Second operand has 6 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:22,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:22,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 216 [2021-10-15 20:24:22,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:23,206 INFO L129 PetriNetUnfolder]: 490/1824 cut-off events. [2021-10-15 20:24:23,207 INFO L130 PetriNetUnfolder]: For 1650/1650 co-relation queries the response was YES. [2021-10-15 20:24:23,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3098 conditions, 1824 events. 490/1824 cut-off events. For 1650/1650 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 12044 event pairs, 0 based on Foata normal form. 4/1399 useless extension candidates. Maximal degree in co-relation 3067. Up to 124 conditions per place. [2021-10-15 20:24:23,223 INFO L132 encePairwiseOnDemand]: 206/216 looper letters, 17 selfloop transitions, 16 changer transitions 0/210 dead transitions. [2021-10-15 20:24:23,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 210 transitions, 779 flow [2021-10-15 20:24:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:24:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:24:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1318 transitions. [2021-10-15 20:24:23,228 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8716931216931217 [2021-10-15 20:24:23,229 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1318 transitions. [2021-10-15 20:24:23,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1318 transitions. [2021-10-15 20:24:23,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:23,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1318 transitions. [2021-10-15 20:24:23,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.28571428571428) internal successors, (1318), 7 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,240 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,240 INFO L186 Difference]: Start difference. First operand has 175 places, 249 transitions, 927 flow. Second operand 7 states and 1318 transitions. [2021-10-15 20:24:23,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 210 transitions, 779 flow [2021-10-15 20:24:23,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 210 transitions, 720 flow, removed 20 selfloop flow, removed 14 redundant places. [2021-10-15 20:24:23,265 INFO L242 Difference]: Finished difference. Result has 160 places, 209 transitions, 695 flow [2021-10-15 20:24:23,265 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=695, PETRI_PLACES=160, PETRI_TRANSITIONS=209} [2021-10-15 20:24:23,266 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 42 predicate places. [2021-10-15 20:24:23,266 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 209 transitions, 695 flow [2021-10-15 20:24:23,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,267 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:23,267 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:23,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:24:23,267 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:23,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1701439479, now seen corresponding path program 1 times [2021-10-15 20:24:23,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:23,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057934065] [2021-10-15 20:24:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:23,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:24:23,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:23,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057934065] [2021-10-15 20:24:23,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057934065] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:23,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:23,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:24:23,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565207973] [2021-10-15 20:24:23,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:24:23,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:24:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:24:23,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 216 [2021-10-15 20:24:23,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 209 transitions, 695 flow. Second operand has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:23,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 216 [2021-10-15 20:24:23,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:23,754 INFO L129 PetriNetUnfolder]: 722/2961 cut-off events. [2021-10-15 20:24:23,755 INFO L130 PetriNetUnfolder]: For 1214/1214 co-relation queries the response was YES. [2021-10-15 20:24:23,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5081 conditions, 2961 events. 722/2961 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 22830 event pairs, 1 based on Foata normal form. 60/2414 useless extension candidates. Maximal degree in co-relation 5058. Up to 261 conditions per place. [2021-10-15 20:24:23,781 INFO L132 encePairwiseOnDemand]: 203/216 looper letters, 43 selfloop transitions, 21 changer transitions 5/251 dead transitions. [2021-10-15 20:24:23,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 251 transitions, 1035 flow [2021-10-15 20:24:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:24:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:24:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1779 transitions. [2021-10-15 20:24:23,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9151234567901234 [2021-10-15 20:24:23,789 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1779 transitions. [2021-10-15 20:24:23,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1779 transitions. [2021-10-15 20:24:23,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:23,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1779 transitions. [2021-10-15 20:24:23,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.66666666666666) internal successors, (1779), 9 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,806 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,807 INFO L186 Difference]: Start difference. First operand has 160 places, 209 transitions, 695 flow. Second operand 9 states and 1779 transitions. [2021-10-15 20:24:23,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 251 transitions, 1035 flow [2021-10-15 20:24:23,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 1023 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 20:24:23,847 INFO L242 Difference]: Finished difference. Result has 171 places, 227 transitions, 905 flow [2021-10-15 20:24:23,847 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=905, PETRI_PLACES=171, PETRI_TRANSITIONS=227} [2021-10-15 20:24:23,848 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 53 predicate places. [2021-10-15 20:24:23,848 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 227 transitions, 905 flow [2021-10-15 20:24:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:23,849 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:23,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:24:23,850 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:23,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1663962474, now seen corresponding path program 1 times [2021-10-15 20:24:23,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:23,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631707649] [2021-10-15 20:24:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:23,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:24:23,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:23,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631707649] [2021-10-15 20:24:23,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631707649] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:23,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:23,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 20:24:23,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038939885] [2021-10-15 20:24:23,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:24:23,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:24:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:24:23,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 216 [2021-10-15 20:24:23,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 227 transitions, 905 flow. Second operand has 9 states, 9 states have (on average 164.66666666666666) internal successors, (1482), 9 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:23,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:23,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 216 [2021-10-15 20:24:23,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:25,307 INFO L129 PetriNetUnfolder]: 1040/4501 cut-off events. [2021-10-15 20:24:25,308 INFO L130 PetriNetUnfolder]: For 4479/4479 co-relation queries the response was YES. [2021-10-15 20:24:25,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9405 conditions, 4501 events. 1040/4501 cut-off events. For 4479/4479 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 40136 event pairs, 1 based on Foata normal form. 14/3796 useless extension candidates. Maximal degree in co-relation 9377. Up to 666 conditions per place. [2021-10-15 20:24:25,354 INFO L132 encePairwiseOnDemand]: 195/216 looper letters, 169 selfloop transitions, 64 changer transitions 2/379 dead transitions. [2021-10-15 20:24:25,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 379 transitions, 2398 flow [2021-10-15 20:24:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:24:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:24:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3252 transitions. [2021-10-15 20:24:25,368 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7923976608187134 [2021-10-15 20:24:25,369 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3252 transitions. [2021-10-15 20:24:25,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3252 transitions. [2021-10-15 20:24:25,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:25,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3252 transitions. [2021-10-15 20:24:25,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.1578947368421) internal successors, (3252), 19 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 216.0) internal successors, (4320), 20 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,418 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 216.0) internal successors, (4320), 20 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,418 INFO L186 Difference]: Start difference. First operand has 171 places, 227 transitions, 905 flow. Second operand 19 states and 3252 transitions. [2021-10-15 20:24:25,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 379 transitions, 2398 flow [2021-10-15 20:24:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 379 transitions, 2266 flow, removed 66 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:25,525 INFO L242 Difference]: Finished difference. Result has 204 places, 283 transitions, 1573 flow [2021-10-15 20:24:25,526 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1573, PETRI_PLACES=204, PETRI_TRANSITIONS=283} [2021-10-15 20:24:25,527 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 86 predicate places. [2021-10-15 20:24:25,527 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 283 transitions, 1573 flow [2021-10-15 20:24:25,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 164.66666666666666) internal successors, (1482), 9 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,528 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:25,528 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:25,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:24:25,529 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:25,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:25,529 INFO L82 PathProgramCache]: Analyzing trace with hash 406527378, now seen corresponding path program 1 times [2021-10-15 20:24:25,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:25,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991037167] [2021-10-15 20:24:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:25,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:24:25,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:25,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991037167] [2021-10-15 20:24:25,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991037167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:25,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:25,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:24:25,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30793341] [2021-10-15 20:24:25,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:24:25,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:24:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:24:25,633 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 216 [2021-10-15 20:24:25,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 283 transitions, 1573 flow. Second operand has 4 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:25,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 216 [2021-10-15 20:24:25,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:25,965 INFO L129 PetriNetUnfolder]: 366/1691 cut-off events. [2021-10-15 20:24:25,965 INFO L130 PetriNetUnfolder]: For 1437/1437 co-relation queries the response was YES. [2021-10-15 20:24:25,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3208 conditions, 1691 events. 366/1691 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 10745 event pairs, 1 based on Foata normal form. 6/1370 useless extension candidates. Maximal degree in co-relation 3164. Up to 186 conditions per place. [2021-10-15 20:24:25,981 INFO L132 encePairwiseOnDemand]: 209/216 looper letters, 9 selfloop transitions, 18 changer transitions 1/229 dead transitions. [2021-10-15 20:24:25,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 229 transitions, 1158 flow [2021-10-15 20:24:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:24:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:24:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2021-10-15 20:24:25,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9212962962962963 [2021-10-15 20:24:25,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2021-10-15 20:24:25,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2021-10-15 20:24:25,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:25,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2021-10-15 20:24:25,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:25,993 INFO L186 Difference]: Start difference. First operand has 204 places, 283 transitions, 1573 flow. Second operand 4 states and 796 transitions. [2021-10-15 20:24:25,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 229 transitions, 1158 flow [2021-10-15 20:24:26,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 229 transitions, 1073 flow, removed 22 selfloop flow, removed 14 redundant places. [2021-10-15 20:24:26,020 INFO L242 Difference]: Finished difference. Result has 188 places, 228 transitions, 1066 flow [2021-10-15 20:24:26,021 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1066, PETRI_PLACES=188, PETRI_TRANSITIONS=228} [2021-10-15 20:24:26,021 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 70 predicate places. [2021-10-15 20:24:26,021 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 228 transitions, 1066 flow [2021-10-15 20:24:26,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:26,022 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:26,022 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:24:26,023 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash -944544913, now seen corresponding path program 1 times [2021-10-15 20:24:26,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:26,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286167698] [2021-10-15 20:24:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:26,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:24:26,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286167698] [2021-10-15 20:24:26,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286167698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:26,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:26,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:26,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145232385] [2021-10-15 20:24:26,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:26,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:26,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:26,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:26,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 216 [2021-10-15 20:24:26,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 228 transitions, 1066 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:26,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:26,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 216 [2021-10-15 20:24:26,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:26,494 INFO L129 PetriNetUnfolder]: 642/3025 cut-off events. [2021-10-15 20:24:26,494 INFO L130 PetriNetUnfolder]: For 2097/2097 co-relation queries the response was YES. [2021-10-15 20:24:26,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5314 conditions, 3025 events. 642/3025 cut-off events. For 2097/2097 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 23705 event pairs, 0 based on Foata normal form. 0/2462 useless extension candidates. Maximal degree in co-relation 5278. Up to 222 conditions per place. [2021-10-15 20:24:26,523 INFO L132 encePairwiseOnDemand]: 212/216 looper letters, 2 selfloop transitions, 3 changer transitions 0/229 dead transitions. [2021-10-15 20:24:26,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 229 transitions, 1078 flow [2021-10-15 20:24:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2021-10-15 20:24:26,527 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9722222222222222 [2021-10-15 20:24:26,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2021-10-15 20:24:26,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2021-10-15 20:24:26,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:26,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2021-10-15 20:24:26,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:26,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:26,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:26,533 INFO L186 Difference]: Start difference. First operand has 188 places, 228 transitions, 1066 flow. Second operand 3 states and 630 transitions. [2021-10-15 20:24:26,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 229 transitions, 1078 flow [2021-10-15 20:24:26,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 229 transitions, 1057 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:26,572 INFO L242 Difference]: Finished difference. Result has 190 places, 229 transitions, 1063 flow [2021-10-15 20:24:26,573 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1063, PETRI_PLACES=190, PETRI_TRANSITIONS=229} [2021-10-15 20:24:26,573 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 72 predicate places. [2021-10-15 20:24:26,573 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 229 transitions, 1063 flow [2021-10-15 20:24:26,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:26,574 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:26,574 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:26,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 20:24:26,575 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash 328528683, now seen corresponding path program 1 times [2021-10-15 20:24:26,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:26,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889262808] [2021-10-15 20:24:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:26,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:24:26,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:26,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889262808] [2021-10-15 20:24:26,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889262808] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:26,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:26,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:26,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841169812] [2021-10-15 20:24:26,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:26,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:26,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 216 [2021-10-15 20:24:26,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 229 transitions, 1063 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:26,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:26,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 216 [2021-10-15 20:24:26,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:27,646 INFO L129 PetriNetUnfolder]: 1188/5685 cut-off events. [2021-10-15 20:24:27,647 INFO L130 PetriNetUnfolder]: For 3944/3944 co-relation queries the response was YES. [2021-10-15 20:24:27,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9893 conditions, 5685 events. 1188/5685 cut-off events. For 3944/3944 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 52386 event pairs, 0 based on Foata normal form. 0/4666 useless extension candidates. Maximal degree in co-relation 9856. Up to 426 conditions per place. [2021-10-15 20:24:27,708 INFO L132 encePairwiseOnDemand]: 212/216 looper letters, 2 selfloop transitions, 3 changer transitions 0/230 dead transitions. [2021-10-15 20:24:27,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 230 transitions, 1075 flow [2021-10-15 20:24:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2021-10-15 20:24:27,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9722222222222222 [2021-10-15 20:24:27,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2021-10-15 20:24:27,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2021-10-15 20:24:27,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:27,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2021-10-15 20:24:27,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:27,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:27,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:27,721 INFO L186 Difference]: Start difference. First operand has 190 places, 229 transitions, 1063 flow. Second operand 3 states and 630 transitions. [2021-10-15 20:24:27,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 230 transitions, 1075 flow [2021-10-15 20:24:27,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 230 transitions, 1069 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:27,799 INFO L242 Difference]: Finished difference. Result has 192 places, 230 transitions, 1075 flow [2021-10-15 20:24:27,799 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1075, PETRI_PLACES=192, PETRI_TRANSITIONS=230} [2021-10-15 20:24:27,800 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 74 predicate places. [2021-10-15 20:24:27,800 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 230 transitions, 1075 flow [2021-10-15 20:24:27,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:27,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:27,801 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:27,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:24:27,801 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash 87613521, now seen corresponding path program 1 times [2021-10-15 20:24:27,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:27,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670988026] [2021-10-15 20:24:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:27,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:24:27,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:27,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670988026] [2021-10-15 20:24:27,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670988026] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:27,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:27,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:27,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61787524] [2021-10-15 20:24:27,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:27,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:27,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 216 [2021-10-15 20:24:27,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 230 transitions, 1075 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:27,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:27,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 216 [2021-10-15 20:24:27,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:29,256 INFO L129 PetriNetUnfolder]: 2266/10977 cut-off events. [2021-10-15 20:24:29,256 INFO L130 PetriNetUnfolder]: For 7740/7740 co-relation queries the response was YES. [2021-10-15 20:24:29,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19209 conditions, 10977 events. 2266/10977 cut-off events. For 7740/7740 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 116698 event pairs, 0 based on Foata normal form. 0/9058 useless extension candidates. Maximal degree in co-relation 19171. Up to 834 conditions per place. [2021-10-15 20:24:29,366 INFO L132 encePairwiseOnDemand]: 212/216 looper letters, 2 selfloop transitions, 3 changer transitions 0/231 dead transitions. [2021-10-15 20:24:29,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 231 transitions, 1087 flow [2021-10-15 20:24:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2021-10-15 20:24:29,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9722222222222222 [2021-10-15 20:24:29,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2021-10-15 20:24:29,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2021-10-15 20:24:29,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:29,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2021-10-15 20:24:29,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:29,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:29,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:29,377 INFO L186 Difference]: Start difference. First operand has 192 places, 230 transitions, 1075 flow. Second operand 3 states and 630 transitions. [2021-10-15 20:24:29,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 231 transitions, 1087 flow [2021-10-15 20:24:29,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 231 transitions, 1081 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:29,550 INFO L242 Difference]: Finished difference. Result has 194 places, 231 transitions, 1087 flow [2021-10-15 20:24:29,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1087, PETRI_PLACES=194, PETRI_TRANSITIONS=231} [2021-10-15 20:24:29,551 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 76 predicate places. [2021-10-15 20:24:29,551 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 231 transitions, 1087 flow [2021-10-15 20:24:29,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:29,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:29,552 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:29,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 20:24:29,553 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:29,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1318592951, now seen corresponding path program 1 times [2021-10-15 20:24:29,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:29,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314885075] [2021-10-15 20:24:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:29,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:24:29,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:29,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314885075] [2021-10-15 20:24:29,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314885075] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:29,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:29,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:29,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920317547] [2021-10-15 20:24:29,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:29,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:29,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:29,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 216 [2021-10-15 20:24:29,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 231 transitions, 1087 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:29,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:29,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 216 [2021-10-15 20:24:29,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:32,345 INFO L129 PetriNetUnfolder]: 4392/21509 cut-off events. [2021-10-15 20:24:32,345 INFO L130 PetriNetUnfolder]: For 15329/15329 co-relation queries the response was YES. [2021-10-15 20:24:32,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37845 conditions, 21509 events. 4392/21509 cut-off events. For 15329/15329 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 259898 event pairs, 0 based on Foata normal form. 0/17834 useless extension candidates. Maximal degree in co-relation 37806. Up to 1650 conditions per place. [2021-10-15 20:24:32,545 INFO L132 encePairwiseOnDemand]: 212/216 looper letters, 2 selfloop transitions, 3 changer transitions 0/232 dead transitions. [2021-10-15 20:24:32,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 232 transitions, 1099 flow [2021-10-15 20:24:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2021-10-15 20:24:32,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9722222222222222 [2021-10-15 20:24:32,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2021-10-15 20:24:32,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2021-10-15 20:24:32,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:32,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2021-10-15 20:24:32,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:32,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:32,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:32,556 INFO L186 Difference]: Start difference. First operand has 194 places, 231 transitions, 1087 flow. Second operand 3 states and 630 transitions. [2021-10-15 20:24:32,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 232 transitions, 1099 flow [2021-10-15 20:24:33,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 232 transitions, 1093 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:33,126 INFO L242 Difference]: Finished difference. Result has 196 places, 232 transitions, 1099 flow [2021-10-15 20:24:33,127 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1099, PETRI_PLACES=196, PETRI_TRANSITIONS=232} [2021-10-15 20:24:33,128 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 78 predicate places. [2021-10-15 20:24:33,128 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 232 transitions, 1099 flow [2021-10-15 20:24:33,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:33,128 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:33,129 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 20:24:33,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:24:33,129 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:33,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1559369011, now seen corresponding path program 1 times [2021-10-15 20:24:33,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:33,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58367213] [2021-10-15 20:24:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:33,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:24:33,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:33,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58367213] [2021-10-15 20:24:33,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58367213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:33,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:33,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:24:33,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032394306] [2021-10-15 20:24:33,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:24:33,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:24:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:24:33,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 216 [2021-10-15 20:24:33,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 232 transitions, 1099 flow. Second operand has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:33,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:33,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 216 [2021-10-15 20:24:33,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:35,850 INFO L129 PetriNetUnfolder]: 4776/20653 cut-off events. [2021-10-15 20:24:35,850 INFO L130 PetriNetUnfolder]: For 16097/16097 co-relation queries the response was YES. [2021-10-15 20:24:35,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40698 conditions, 20653 events. 4776/20653 cut-off events. For 16097/16097 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 237657 event pairs, 0 based on Foata normal form. 940/17790 useless extension candidates. Maximal degree in co-relation 40658. Up to 2226 conditions per place. [2021-10-15 20:24:36,005 INFO L132 encePairwiseOnDemand]: 208/216 looper letters, 0 selfloop transitions, 0 changer transitions 229/229 dead transitions. [2021-10-15 20:24:36,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 229 transitions, 1117 flow [2021-10-15 20:24:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:24:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:24:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1184 transitions. [2021-10-15 20:24:36,011 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9135802469135802 [2021-10-15 20:24:36,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1184 transitions. [2021-10-15 20:24:36,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1184 transitions. [2021-10-15 20:24:36,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:36,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1184 transitions. [2021-10-15 20:24:36,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.33333333333334) internal successors, (1184), 6 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:36,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 216.0) internal successors, (1512), 7 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:36,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 216.0) internal successors, (1512), 7 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:36,022 INFO L186 Difference]: Start difference. First operand has 196 places, 232 transitions, 1099 flow. Second operand 6 states and 1184 transitions. [2021-10-15 20:24:36,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 229 transitions, 1117 flow [2021-10-15 20:24:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 229 transitions, 1111 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:24:36,758 INFO L242 Difference]: Finished difference. Result has 195 places, 0 transitions, 0 flow [2021-10-15 20:24:36,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=195, PETRI_TRANSITIONS=0} [2021-10-15 20:24:36,759 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 77 predicate places. [2021-10-15 20:24:36,759 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 0 transitions, 0 flow [2021-10-15 20:24:36,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:36,762 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:24:36,763 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:24:36,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:24:36,766 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:24:36,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:24:36 BoogieIcfgContainer [2021-10-15 20:24:36,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:24:36,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:24:36,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:24:36,773 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:24:36,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:18" (3/4) ... [2021-10-15 20:24:36,778 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:24:36,812 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 71 nodes and edges [2021-10-15 20:24:36,815 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 38 nodes and edges [2021-10-15 20:24:36,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-15 20:24:36,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-15 20:24:36,821 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:24:36,824 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:24:36,963 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:24:36,963 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:24:36,965 INFO L168 Benchmark]: Toolchain (without parser) took 20847.96 ms. Allocated memory was 123.7 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 93.9 MB in the beginning and 5.2 GB in the end (delta: -5.1 GB). Peak memory consumption was 543.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:36,966 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:24:36,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 835.77 ms. Allocated memory is still 123.7 MB. Free memory was 93.6 MB in the beginning and 58.8 MB in the end (delta: 34.8 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:36,968 INFO L168 Benchmark]: Boogie Procedure Inliner took 147.40 ms. Allocated memory is still 123.7 MB. Free memory was 58.8 MB in the beginning and 53.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:36,968 INFO L168 Benchmark]: Boogie Preprocessor took 61.78 ms. Allocated memory is still 123.7 MB. Free memory was 53.7 MB in the beginning and 50.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:36,968 INFO L168 Benchmark]: RCFGBuilder took 1582.58 ms. Allocated memory is still 123.7 MB. Free memory was 50.4 MB in the beginning and 42.9 MB in the end (delta: 7.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:36,969 INFO L168 Benchmark]: TraceAbstraction took 18022.80 ms. Allocated memory was 123.7 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 42.4 MB in the beginning and 5.2 GB in the end (delta: -5.2 GB). Peak memory consumption was 732.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:36,969 INFO L168 Benchmark]: Witness Printer took 191.09 ms. Allocated memory is still 5.8 GB. Free memory was 5.2 GB in the beginning and 5.2 GB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:36,972 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 835.77 ms. Allocated memory is still 123.7 MB. Free memory was 93.6 MB in the beginning and 58.8 MB in the end (delta: 34.8 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 147.40 ms. Allocated memory is still 123.7 MB. Free memory was 58.8 MB in the beginning and 53.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.78 ms. Allocated memory is still 123.7 MB. Free memory was 53.7 MB in the beginning and 50.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1582.58 ms. Allocated memory is still 123.7 MB. Free memory was 50.4 MB in the beginning and 42.9 MB in the end (delta: 7.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18022.80 ms. Allocated memory was 123.7 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 42.4 MB in the beginning and 5.2 GB in the end (delta: -5.2 GB). Peak memory consumption was 732.5 MB. Max. memory is 16.1 GB. * Witness Printer took 191.09 ms. Allocated memory is still 5.8 GB. Free memory was 5.2 GB in the beginning and 5.2 GB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 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: 207]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 207]: 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, 134 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17925.2ms, OverallIterations: 16, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 14954.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 192 SDtfs, 902 SDslu, 517 SDs, 0 SdLazy, 512 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 846.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 841.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1573occurred in iteration=10, InterpolantAutomatonStates: 102, 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: 224.5ms SsaConstructionTime, 654.2ms SatisfiabilityAnalysisTime, 1370.8ms InterpolantComputationTime, 824 NumberOfCodeBlocks, 824 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 807 ConstructedInterpolants, 0 QuantifiedInterpolants, 1263 SizeOfPredicates, 0 NumberOfNonLiveVariables, 734 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 17 InterpolantComputations, 15 PerfectInterpolantSequences, 89/93 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:24:37,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcbdf96-5f32-4efe-9f87-01712186bcca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...