./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label28.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_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/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_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/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_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/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 a91360cde292feef26ce63dd86a79ea34c8e0be3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:35:33,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:35:33,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:35:33,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:35:33,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:35:33,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:35:33,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:35:33,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:35:33,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:35:33,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:35:33,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:35:33,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:35:33,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:35:33,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:35:33,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:35:33,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:35:33,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:35:33,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:35:33,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:35:33,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:35:33,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:35:33,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:35:33,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:35:33,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:35:33,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:35:33,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:35:33,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:35:33,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:35:33,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:35:33,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:35:33,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:35:33,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:35:33,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:35:33,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:35:33,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:35:33,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:35:33,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:35:33,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:35:33,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:35:33,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:35:33,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:35:33,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:35:33,211 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:35:33,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:35:33,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:35:33,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:35:33,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:35:33,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:35:33,214 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:35:33,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:35:33,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:35:33,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:35:33,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:35:33,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:35:33,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:35:33,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:35:33,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:35:33,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:35:33,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:35:33,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:35:33,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:35:33,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:35:33,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:35:33,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:35:33,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:35:33,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:35:33,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:35:33,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:35:33,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:35:33,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:35:33,225 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:35:33,226 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:35:33,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:35:33,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:35:33,227 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_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a91360cde292feef26ce63dd86a79ea34c8e0be3 [2021-10-15 19:35:33,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:35:33,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:35:33,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:35:33,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:35:33,647 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:35:33,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem02_label28.c [2021-10-15 19:35:33,755 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/data/36c68a173/7e66cd1719474896aaa853bc22ad4bca/FLAG1b3732cc2 [2021-10-15 19:35:34,454 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:35:34,455 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/sv-benchmarks/c/eca-rers2012/Problem02_label28.c [2021-10-15 19:35:34,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/data/36c68a173/7e66cd1719474896aaa853bc22ad4bca/FLAG1b3732cc2 [2021-10-15 19:35:34,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/data/36c68a173/7e66cd1719474896aaa853bc22ad4bca [2021-10-15 19:35:34,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:35:34,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:35:34,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:35:34,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:35:34,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:35:34,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:35:34" (1/1) ... [2021-10-15 19:35:34,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61df584e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:34, skipping insertion in model container [2021-10-15 19:35:34,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:35:34" (1/1) ... [2021-10-15 19:35:34,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:35:34,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:35:35,357 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_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/sv-benchmarks/c/eca-rers2012/Problem02_label28.c[19513,19526] [2021-10-15 19:35:35,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:35:35,418 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:35:35,519 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_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/sv-benchmarks/c/eca-rers2012/Problem02_label28.c[19513,19526] [2021-10-15 19:35:35,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:35:35,558 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:35:35,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35 WrapperNode [2021-10-15 19:35:35,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:35:35,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:35:35,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:35:35,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:35:35,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:35:35,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:35:35,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:35:35,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:35:35,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:35:35,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:35:35,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:35:35,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:35:35,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (1/1) ... [2021-10-15 19:35:35,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:35:35,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:35:35,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:35:35,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:35:35,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:35:35,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:35:35,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:35:35,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:35:37,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:35:37,407 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:35:37,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:35:37 BoogieIcfgContainer [2021-10-15 19:35:37,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:35:37,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:35:37,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:35:37,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:35:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:35:34" (1/3) ... [2021-10-15 19:35:37,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41495b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:35:37, skipping insertion in model container [2021-10-15 19:35:37,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:35:35" (2/3) ... [2021-10-15 19:35:37,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41495b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:35:37, skipping insertion in model container [2021-10-15 19:35:37,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:35:37" (3/3) ... [2021-10-15 19:35:37,425 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label28.c [2021-10-15 19:35:37,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:35:37,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:35:37,510 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:35:37,527 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:35:37,528 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:35:37,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:35:37,680 INFO L129 PetriNetUnfolder]: 149/375 cut-off events. [2021-10-15 19:35:37,681 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:35:37,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 375 events. 149/375 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 260 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 19:35:37,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:35:37,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 370 transitions, 740 flow [2021-10-15 19:35:37,801 INFO L129 PetriNetUnfolder]: 129/317 cut-off events. [2021-10-15 19:35:37,801 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:35:37,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:37,803 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:35:37,803 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:37,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1341014581, now seen corresponding path program 1 times [2021-10-15 19:35:37,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:37,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018391842] [2021-10-15 19:35:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:37,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:38,327 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 19:35:38,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:38,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018391842] [2021-10-15 19:35:38,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018391842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:38,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:35:38,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:35:38,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093835527] [2021-10-15 19:35:38,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:38,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:35:38,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:35:38,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 370 transitions, 740 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:38,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:38,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:35:38,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:39,551 INFO L129 PetriNetUnfolder]: 181/545 cut-off events. [2021-10-15 19:35:39,552 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:35:39,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 545 events. 181/545 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 760 event pairs, 0 based on Foata normal form. 61/365 useless extension candidates. Maximal degree in co-relation 3. Up to 314 conditions per place. [2021-10-15 19:35:39,565 INFO L132 encePairwiseOnDemand]: 172/375 looper letters, 353 selfloop transitions, 80 changer transitions 81/540 dead transitions. [2021-10-15 19:35:39,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 540 transitions, 2108 flow [2021-10-15 19:35:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 703 transitions. [2021-10-15 19:35:39,593 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6248888888888889 [2021-10-15 19:35:39,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 703 transitions. [2021-10-15 19:35:39,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 703 transitions. [2021-10-15 19:35:39,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:39,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 703 transitions. [2021-10-15 19:35:39,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:39,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:39,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:39,628 INFO L186 Difference]: Start difference. First operand has 224 places, 370 transitions, 740 flow. Second operand 3 states and 703 transitions. [2021-10-15 19:35:39,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 540 transitions, 2108 flow [2021-10-15 19:35:39,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 540 transitions, 2108 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:35:39,661 INFO L242 Difference]: Finished difference. Result has 228 places, 323 transitions, 1118 flow [2021-10-15 19:35:39,664 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1118, PETRI_PLACES=228, PETRI_TRANSITIONS=323} [2021-10-15 19:35:39,665 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, 4 predicate places. [2021-10-15 19:35:39,665 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 323 transitions, 1118 flow [2021-10-15 19:35:39,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:39,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:39,667 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:35:39,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:35:39,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:39,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1257245839, now seen corresponding path program 1 times [2021-10-15 19:35:39,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:39,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074915499] [2021-10-15 19:35:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:39,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:35:39,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:39,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074915499] [2021-10-15 19:35:39,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074915499] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:39,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:35:39,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:35:39,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312295789] [2021-10-15 19:35:39,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:39,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:35:39,821 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 375 [2021-10-15 19:35:39,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 323 transitions, 1118 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:39,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:39,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 375 [2021-10-15 19:35:39,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:40,654 INFO L129 PetriNetUnfolder]: 283/881 cut-off events. [2021-10-15 19:35:40,654 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2021-10-15 19:35:40,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 881 events. 283/881 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2071 event pairs, 0 based on Foata normal form. 30/902 useless extension candidates. Maximal degree in co-relation 957. Up to 453 conditions per place. [2021-10-15 19:35:40,664 INFO L132 encePairwiseOnDemand]: 333/375 looper letters, 509 selfloop transitions, 53 changer transitions 0/584 dead transitions. [2021-10-15 19:35:40,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 584 transitions, 3130 flow [2021-10-15 19:35:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2021-10-15 19:35:40,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.464 [2021-10-15 19:35:40,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2021-10-15 19:35:40,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2021-10-15 19:35:40,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:40,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2021-10-15 19:35:40,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:40,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:40,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:40,679 INFO L186 Difference]: Start difference. First operand has 228 places, 323 transitions, 1118 flow. Second operand 3 states and 522 transitions. [2021-10-15 19:35:40,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 584 transitions, 3130 flow [2021-10-15 19:35:40,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 584 transitions, 2848 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:35:40,714 INFO L242 Difference]: Finished difference. Result has 169 places, 357 transitions, 1359 flow [2021-10-15 19:35:40,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=169, PETRI_TRANSITIONS=357} [2021-10-15 19:35:40,716 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -55 predicate places. [2021-10-15 19:35:40,716 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 357 transitions, 1359 flow [2021-10-15 19:35:40,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:40,717 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:40,717 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:35:40,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:35:40,718 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash 440774054, now seen corresponding path program 1 times [2021-10-15 19:35:40,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:40,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467390714] [2021-10-15 19:35:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:40,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:35:40,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:40,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467390714] [2021-10-15 19:35:40,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467390714] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:40,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:35:40,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:35:40,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578318396] [2021-10-15 19:35:40,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:40,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:35:40,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:35:40,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 357 transitions, 1359 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:40,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:40,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:35:40,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:41,270 INFO L129 PetriNetUnfolder]: 189/635 cut-off events. [2021-10-15 19:35:41,271 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2021-10-15 19:35:41,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 635 events. 189/635 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1097 event pairs, 0 based on Foata normal form. 30/661 useless extension candidates. Maximal degree in co-relation 493. Up to 592 conditions per place. [2021-10-15 19:35:41,277 INFO L132 encePairwiseOnDemand]: 359/375 looper letters, 275 selfloop transitions, 1 changer transitions 0/299 dead transitions. [2021-10-15 19:35:41,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 299 transitions, 1559 flow [2021-10-15 19:35:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2021-10-15 19:35:41,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.26755555555555555 [2021-10-15 19:35:41,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2021-10-15 19:35:41,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2021-10-15 19:35:41,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:41,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2021-10-15 19:35:41,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:41,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:41,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:41,289 INFO L186 Difference]: Start difference. First operand has 169 places, 357 transitions, 1359 flow. Second operand 3 states and 301 transitions. [2021-10-15 19:35:41,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 299 transitions, 1559 flow [2021-10-15 19:35:41,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 299 transitions, 1508 flow, removed 16 selfloop flow, removed 1 redundant places. [2021-10-15 19:35:41,307 INFO L242 Difference]: Finished difference. Result has 162 places, 299 transitions, 958 flow [2021-10-15 19:35:41,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=958, PETRI_PLACES=162, PETRI_TRANSITIONS=299} [2021-10-15 19:35:41,309 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -62 predicate places. [2021-10-15 19:35:41,309 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 299 transitions, 958 flow [2021-10-15 19:35:41,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:41,310 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:41,310 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:35:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:35:41,311 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1258214582, now seen corresponding path program 1 times [2021-10-15 19:35:41,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:41,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82239593] [2021-10-15 19:35:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:41,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:35:41,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:41,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82239593] [2021-10-15 19:35:41,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82239593] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:41,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:35:41,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:35:41,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016177577] [2021-10-15 19:35:41,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:41,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:35:41,464 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:35:41,464 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 299 transitions, 958 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:41,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:41,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:35:41,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:42,184 INFO L129 PetriNetUnfolder]: 328/1211 cut-off events. [2021-10-15 19:35:42,184 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-15 19:35:42,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 1211 events. 328/1211 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4106 event pairs, 0 based on Foata normal form. 47/1252 useless extension candidates. Maximal degree in co-relation 2698. Up to 595 conditions per place. [2021-10-15 19:35:42,195 INFO L132 encePairwiseOnDemand]: 323/375 looper letters, 422 selfloop transitions, 89 changer transitions 0/537 dead transitions. [2021-10-15 19:35:42,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 537 transitions, 2732 flow [2021-10-15 19:35:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 19:35:42,200 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43644444444444447 [2021-10-15 19:35:42,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 19:35:42,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 19:35:42,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:42,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 19:35:42,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:42,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:42,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:42,210 INFO L186 Difference]: Start difference. First operand has 162 places, 299 transitions, 958 flow. Second operand 3 states and 491 transitions. [2021-10-15 19:35:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 537 transitions, 2732 flow [2021-10-15 19:35:42,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 537 transitions, 2731 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:35:42,237 INFO L242 Difference]: Finished difference. Result has 165 places, 377 transitions, 1877 flow [2021-10-15 19:35:42,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1877, PETRI_PLACES=165, PETRI_TRANSITIONS=377} [2021-10-15 19:35:42,238 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -59 predicate places. [2021-10-15 19:35:42,238 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 377 transitions, 1877 flow [2021-10-15 19:35:42,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:42,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:42,240 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:35:42,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:35:42,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1402854175, now seen corresponding path program 1 times [2021-10-15 19:35:42,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:42,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715235172] [2021-10-15 19:35:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:42,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:35:42,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:42,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715235172] [2021-10-15 19:35:42,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715235172] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:42,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:35:42,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:35:42,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632167005] [2021-10-15 19:35:42,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:42,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:35:42,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:35:42,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 377 transitions, 1877 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:42,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:42,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:35:42,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:43,384 INFO L129 PetriNetUnfolder]: 429/1872 cut-off events. [2021-10-15 19:35:43,384 INFO L130 PetriNetUnfolder]: For 1042/1042 co-relation queries the response was YES. [2021-10-15 19:35:43,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4660 conditions, 1872 events. 429/1872 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8592 event pairs, 0 based on Foata normal form. 110/1982 useless extension candidates. Maximal degree in co-relation 4647. Up to 958 conditions per place. [2021-10-15 19:35:43,399 INFO L132 encePairwiseOnDemand]: 308/375 looper letters, 427 selfloop transitions, 134 changer transitions 0/575 dead transitions. [2021-10-15 19:35:43,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 575 transitions, 3717 flow [2021-10-15 19:35:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2021-10-15 19:35:43,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42044444444444445 [2021-10-15 19:35:43,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2021-10-15 19:35:43,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2021-10-15 19:35:43,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:43,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2021-10-15 19:35:43,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:43,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:43,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:43,412 INFO L186 Difference]: Start difference. First operand has 165 places, 377 transitions, 1877 flow. Second operand 3 states and 473 transitions. [2021-10-15 19:35:43,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 575 transitions, 3717 flow [2021-10-15 19:35:43,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 575 transitions, 3501 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:35:43,445 INFO L242 Difference]: Finished difference. Result has 167 places, 439 transitions, 2879 flow [2021-10-15 19:35:43,446 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2879, PETRI_PLACES=167, PETRI_TRANSITIONS=439} [2021-10-15 19:35:43,446 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -57 predicate places. [2021-10-15 19:35:43,447 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 439 transitions, 2879 flow [2021-10-15 19:35:43,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:43,447 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:43,448 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:35:43,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:35:43,448 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:43,449 INFO L82 PathProgramCache]: Analyzing trace with hash 199399222, now seen corresponding path program 1 times [2021-10-15 19:35:43,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:43,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766638365] [2021-10-15 19:35:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:43,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 19:35:43,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:43,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766638365] [2021-10-15 19:35:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766638365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:43,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:35:43,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:35:43,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946486924] [2021-10-15 19:35:43,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:43,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:35:43,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:35:43,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 439 transitions, 2879 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:43,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:43,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:35:43,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:44,451 INFO L129 PetriNetUnfolder]: 341/1779 cut-off events. [2021-10-15 19:35:44,451 INFO L130 PetriNetUnfolder]: For 2038/2038 co-relation queries the response was YES. [2021-10-15 19:35:44,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4586 conditions, 1779 events. 341/1779 cut-off events. For 2038/2038 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8441 event pairs, 0 based on Foata normal form. 87/1866 useless extension candidates. Maximal degree in co-relation 4571. Up to 823 conditions per place. [2021-10-15 19:35:44,467 INFO L132 encePairwiseOnDemand]: 325/375 looper letters, 403 selfloop transitions, 107 changer transitions 0/536 dead transitions. [2021-10-15 19:35:44,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 536 transitions, 3887 flow [2021-10-15 19:35:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2021-10-15 19:35:44,471 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41955555555555557 [2021-10-15 19:35:44,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2021-10-15 19:35:44,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2021-10-15 19:35:44,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:44,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2021-10-15 19:35:44,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:44,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:44,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:44,481 INFO L186 Difference]: Start difference. First operand has 167 places, 439 transitions, 2879 flow. Second operand 3 states and 472 transitions. [2021-10-15 19:35:44,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 536 transitions, 3887 flow [2021-10-15 19:35:44,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 536 transitions, 3645 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:35:44,514 INFO L242 Difference]: Finished difference. Result has 168 places, 404 transitions, 2704 flow [2021-10-15 19:35:44,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2704, PETRI_PLACES=168, PETRI_TRANSITIONS=404} [2021-10-15 19:35:44,516 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -56 predicate places. [2021-10-15 19:35:44,516 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 404 transitions, 2704 flow [2021-10-15 19:35:44,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:44,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:44,517 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:35:44,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:35:44,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:44,519 INFO L82 PathProgramCache]: Analyzing trace with hash 982726519, now seen corresponding path program 1 times [2021-10-15 19:35:44,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:44,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407729243] [2021-10-15 19:35:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:44,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:35:44,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:44,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407729243] [2021-10-15 19:35:44,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407729243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:35:44,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925213523] [2021-10-15 19:35:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:44,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:35:44,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:35:44,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:35:44,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:35:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:35:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:35:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:35:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925213523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:45,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:35:45,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:35:45,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512401193] [2021-10-15 19:35:45,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:45,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:35:45,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:35:45,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 404 transitions, 2704 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:45,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:45,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:35:45,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:46,745 INFO L129 PetriNetUnfolder]: 395/2110 cut-off events. [2021-10-15 19:35:46,745 INFO L130 PetriNetUnfolder]: For 2397/2397 co-relation queries the response was YES. [2021-10-15 19:35:46,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5633 conditions, 2110 events. 395/2110 cut-off events. For 2397/2397 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10871 event pairs, 0 based on Foata normal form. 26/2136 useless extension candidates. Maximal degree in co-relation 5618. Up to 1746 conditions per place. [2021-10-15 19:35:46,758 INFO L132 encePairwiseOnDemand]: 327/375 looper letters, 0 selfloop transitions, 0 changer transitions 570/570 dead transitions. [2021-10-15 19:35:46,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 570 transitions, 4396 flow [2021-10-15 19:35:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2021-10-15 19:35:46,763 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4017777777777778 [2021-10-15 19:35:46,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2021-10-15 19:35:46,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2021-10-15 19:35:46,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:46,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2021-10-15 19:35:46,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:46,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:46,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:46,777 INFO L186 Difference]: Start difference. First operand has 168 places, 404 transitions, 2704 flow. Second operand 3 states and 452 transitions. [2021-10-15 19:35:46,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 570 transitions, 4396 flow [2021-10-15 19:35:46,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 570 transitions, 4283 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:35:46,810 INFO L242 Difference]: Finished difference. Result has 165 places, 0 transitions, 0 flow [2021-10-15 19:35:46,811 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=165, PETRI_TRANSITIONS=0} [2021-10-15 19:35:46,811 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -59 predicate places. [2021-10-15 19:35:46,811 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 0 transitions, 0 flow [2021-10-15 19:35:46,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:46,815 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:35:46,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:35:47,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:35:47,037 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:35:47,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:35:47 BoogieIcfgContainer [2021-10-15 19:35:47,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:35:47,050 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:35:47,050 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:35:47,050 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:35:47,051 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:35:37" (3/4) ... [2021-10-15 19:35:47,055 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:35:47,093 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:35:47,095 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:35:47,096 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:35:47,098 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:35:47,309 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:35:47,310 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:35:47,312 INFO L168 Benchmark]: Toolchain (without parser) took 12636.23 ms. Allocated memory was 113.2 MB in the beginning and 220.2 MB in the end (delta: 107.0 MB). Free memory was 76.8 MB in the beginning and 114.9 MB in the end (delta: -38.1 MB). Peak memory consumption was 67.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:47,313 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 84.9 MB in the beginning and 84.9 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:35:47,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 876.64 ms. Allocated memory is still 113.2 MB. Free memory was 76.6 MB in the beginning and 73.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:47,314 INFO L168 Benchmark]: Boogie Procedure Inliner took 144.61 ms. Allocated memory is still 113.2 MB. Free memory was 73.8 MB in the beginning and 68.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:47,315 INFO L168 Benchmark]: Boogie Preprocessor took 75.51 ms. Allocated memory is still 113.2 MB. Free memory was 68.4 MB in the beginning and 64.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:47,315 INFO L168 Benchmark]: RCFGBuilder took 1627.19 ms. Allocated memory is still 113.2 MB. Free memory was 64.2 MB in the beginning and 60.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:47,316 INFO L168 Benchmark]: TraceAbstraction took 9634.06 ms. Allocated memory was 113.2 MB in the beginning and 220.2 MB in the end (delta: 107.0 MB). Free memory was 59.9 MB in the beginning and 129.6 MB in the end (delta: -69.6 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:47,316 INFO L168 Benchmark]: Witness Printer took 260.07 ms. Allocated memory is still 220.2 MB. Free memory was 129.6 MB in the beginning and 114.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:47,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 84.9 MB in the beginning and 84.9 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 876.64 ms. Allocated memory is still 113.2 MB. Free memory was 76.6 MB in the beginning and 73.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 144.61 ms. Allocated memory is still 113.2 MB. Free memory was 73.8 MB in the beginning and 68.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.51 ms. Allocated memory is still 113.2 MB. Free memory was 68.4 MB in the beginning and 64.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1627.19 ms. Allocated memory is still 113.2 MB. Free memory was 64.2 MB in the beginning and 60.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9634.06 ms. Allocated memory was 113.2 MB in the beginning and 220.2 MB in the end (delta: 107.0 MB). Free memory was 59.9 MB in the beginning and 129.6 MB in the end (delta: -69.6 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. * Witness Printer took 260.07 ms. Allocated memory is still 220.2 MB. Free memory was 129.6 MB in the beginning and 114.9 MB 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: 554]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 227 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 69.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9531.2ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 6729.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 203.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 343 SDtfs, 895 SDslu, 0 SDs, 0 SdLazy, 2383 SolverSat, 423 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2826.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2879occurred in iteration=5, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 129.4ms SsaConstructionTime, 313.7ms SatisfiabilityAnalysisTime, 1537.2ms InterpolantComputationTime, 1139 NumberOfCodeBlocks, 1139 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 1131 ConstructedInterpolants, 0 QuantifiedInterpolants, 3543 SizeOfPredicates, 0 NumberOfNonLiveVariables, 293 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 8 InterpolantComputations, 7 PerfectInterpolantSequences, 157/173 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:35:47,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f38cf5-e800-48a3-a8a2-6fe3ba218db9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...