./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --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_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/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_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/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_a51a4570-b718-4a84-8db0-d365d700f971/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 661240919dc6588bede452a002e2db53a892483c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:06:54,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:54,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:54,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:54,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:54,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:54,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:54,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:54,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:54,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:54,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:54,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:54,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:54,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:54,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:54,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:54,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:54,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:54,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:54,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:54,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:54,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:54,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:54,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:54,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:54,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:54,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:54,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:54,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:54,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:54,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:54,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:54,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:54,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:54,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:54,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:54,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:54,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:54,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:54,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:54,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:54,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:55,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:55,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:55,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:55,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:55,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:55,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:55,020 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:55,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:55,021 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:55,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:55,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:55,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:55,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:55,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:55,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:55,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:55,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:55,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:55,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:55,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:55,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:55,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:55,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:55,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:55,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:55,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:55,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:55,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:55,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:55,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:55,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:55,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:55,029 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_a51a4570-b718-4a84-8db0-d365d700f971/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 661240919dc6588bede452a002e2db53a892483c [2021-10-15 19:06:55,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:55,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:55,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:55,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:55,308 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:55,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2021-10-15 19:06:55,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/data/6616b6475/ca359929581c4b96b3f564370f0f319a/FLAG9586ed62a [2021-10-15 19:06:56,002 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:56,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2021-10-15 19:06:56,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/data/6616b6475/ca359929581c4b96b3f564370f0f319a/FLAG9586ed62a [2021-10-15 19:06:56,338 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/data/6616b6475/ca359929581c4b96b3f564370f0f319a [2021-10-15 19:06:56,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:56,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:56,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:56,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:56,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:56,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:56,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43487722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56, skipping insertion in model container [2021-10-15 19:06:56,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:56,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:56,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:56,841 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_a51a4570-b718-4a84-8db0-d365d700f971/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2021-10-15 19:06:56,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:56,860 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:56,918 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_a51a4570-b718-4a84-8db0-d365d700f971/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2021-10-15 19:06:56,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:56,963 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:56,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56 WrapperNode [2021-10-15 19:06:56,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:56,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:56,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:56,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:56,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:57,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:57,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:57,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:57,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:57,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:57,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:57,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:57,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (1/1) ... [2021-10-15 19:06:57,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:57,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:57,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:06:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:06:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:06:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:06:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:06:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 19:06:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:57,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:57,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:57,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:57,596 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-15 19:06:57,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:57 BoogieIcfgContainer [2021-10-15 19:06:57,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:57,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:57,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:57,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:57,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:56" (1/3) ... [2021-10-15 19:06:57,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5610d2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:57, skipping insertion in model container [2021-10-15 19:06:57,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:56" (2/3) ... [2021-10-15 19:06:57,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5610d2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:57, skipping insertion in model container [2021-10-15 19:06:57,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:57" (3/3) ... [2021-10-15 19:06:57,608 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2021-10-15 19:06:57,613 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:57,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:06:57,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:57,682 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:06:57,683 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:06:57,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 31 transitions, 62 flow [2021-10-15 19:06:57,716 INFO L129 PetriNetUnfolder]: 9/31 cut-off events. [2021-10-15 19:06:57,716 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:57,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 31 events. 9/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:06:57,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 31 transitions, 62 flow [2021-10-15 19:06:57,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 25 transitions, 50 flow [2021-10-15 19:06:57,728 INFO L129 PetriNetUnfolder]: 7/24 cut-off events. [2021-10-15 19:06:57,729 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:57,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:57,731 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:57,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1724474201, now seen corresponding path program 1 times [2021-10-15 19:06:57,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:57,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856207923] [2021-10-15 19:06:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:57,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:57,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:57,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856207923] [2021-10-15 19:06:57,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856207923] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:57,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:57,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:57,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769367060] [2021-10-15 19:06:57,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:57,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:58,018 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 31 [2021-10-15 19:06:58,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 25 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:58,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 31 [2021-10-15 19:06:58,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:58,080 INFO L129 PetriNetUnfolder]: 4/27 cut-off events. [2021-10-15 19:06:58,080 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:58,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 2/25 useless extension candidates. Maximal degree in co-relation 14. Up to 5 conditions per place. [2021-10-15 19:06:58,082 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 4 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2021-10-15 19:06:58,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 60 flow [2021-10-15 19:06:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2021-10-15 19:06:58,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8602150537634409 [2021-10-15 19:06:58,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2021-10-15 19:06:58,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2021-10-15 19:06:58,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:58,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2021-10-15 19:06:58,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,118 INFO L186 Difference]: Start difference. First operand has 19 places, 25 transitions, 50 flow. Second operand 3 states and 80 transitions. [2021-10-15 19:06:58,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 60 flow [2021-10-15 19:06:58,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 60 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:58,124 INFO L242 Difference]: Finished difference. Result has 22 places, 23 transitions, 56 flow [2021-10-15 19:06:58,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=23} [2021-10-15 19:06:58,127 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2021-10-15 19:06:58,127 INFO L470 AbstractCegarLoop]: Abstraction has has 22 places, 23 transitions, 56 flow [2021-10-15 19:06:58,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,128 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:58,128 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:58,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:06:58,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1462003263, now seen corresponding path program 1 times [2021-10-15 19:06:58,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:58,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342740982] [2021-10-15 19:06:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:58,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:58,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:58,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342740982] [2021-10-15 19:06:58,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342740982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:58,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095746209] [2021-10-15 19:06:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:58,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:58,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:58,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:06:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:06:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:58,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095746209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:58,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:58,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 19:06:58,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876528505] [2021-10-15 19:06:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:58,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:58,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 31 [2021-10-15 19:06:58,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 23 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:58,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 31 [2021-10-15 19:06:58,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:58,484 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-10-15 19:06:58,484 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:06:58,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 28 events. 4/28 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2021-10-15 19:06:58,485 INFO L132 encePairwiseOnDemand]: 27/31 looper letters, 3 selfloop transitions, 4 changer transitions 0/25 dead transitions. [2021-10-15 19:06:58,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 74 flow [2021-10-15 19:06:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2021-10-15 19:06:58,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2021-10-15 19:06:58,489 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2021-10-15 19:06:58,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2021-10-15 19:06:58,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:58,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2021-10-15 19:06:58,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,494 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,494 INFO L186 Difference]: Start difference. First operand has 22 places, 23 transitions, 56 flow. Second operand 4 states and 100 transitions. [2021-10-15 19:06:58,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 74 flow [2021-10-15 19:06:58,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:58,498 INFO L242 Difference]: Finished difference. Result has 26 places, 24 transitions, 74 flow [2021-10-15 19:06:58,498 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2021-10-15 19:06:58,499 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 7 predicate places. [2021-10-15 19:06:58,499 INFO L470 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 74 flow [2021-10-15 19:06:58,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:58,500 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:58,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:58,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:58,716 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1187830695, now seen corresponding path program 2 times [2021-10-15 19:06:58,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:58,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188798793] [2021-10-15 19:06:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:58,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 19:06:58,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:58,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188798793] [2021-10-15 19:06:58,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188798793] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:58,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:58,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:06:58,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829204972] [2021-10-15 19:06:58,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:58,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:58,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 31 [2021-10-15 19:06:58,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:58,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 31 [2021-10-15 19:06:58,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:58,968 INFO L129 PetriNetUnfolder]: 6/36 cut-off events. [2021-10-15 19:06:58,969 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 19:06:58,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 36 events. 6/36 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 31. Up to 5 conditions per place. [2021-10-15 19:06:58,970 INFO L132 encePairwiseOnDemand]: 27/31 looper letters, 4 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2021-10-15 19:06:58,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 92 flow [2021-10-15 19:06:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2021-10-15 19:06:58,986 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7741935483870968 [2021-10-15 19:06:58,987 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 96 transitions. [2021-10-15 19:06:58,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 96 transitions. [2021-10-15 19:06:58,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:58,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 96 transitions. [2021-10-15 19:06:58,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,991 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,992 INFO L186 Difference]: Start difference. First operand has 26 places, 24 transitions, 74 flow. Second operand 4 states and 96 transitions. [2021-10-15 19:06:58,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 92 flow [2021-10-15 19:06:58,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 88 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:58,995 INFO L242 Difference]: Finished difference. Result has 29 places, 25 transitions, 84 flow [2021-10-15 19:06:58,996 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2021-10-15 19:06:58,996 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2021-10-15 19:06:58,996 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 84 flow [2021-10-15 19:06:58,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:58,997 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:58,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:06:58,998 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1537774224, now seen corresponding path program 1 times [2021-10-15 19:06:59,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:59,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132215734] [2021-10-15 19:06:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:59,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 19:06:59,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:59,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132215734] [2021-10-15 19:06:59,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132215734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502576000] [2021-10-15 19:06:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:59,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:59,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:59,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:59,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:06:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:06:59,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 19:06:59,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502576000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:59,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:59,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-15 19:06:59,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094014827] [2021-10-15 19:06:59,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:06:59,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:06:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:06:59,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 31 [2021-10-15 19:06:59,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:59,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 31 [2021-10-15 19:06:59,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:59,438 INFO L129 PetriNetUnfolder]: 6/37 cut-off events. [2021-10-15 19:06:59,438 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-10-15 19:06:59,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 37 events. 6/37 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 16 event pairs, 0 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 38. Up to 4 conditions per place. [2021-10-15 19:06:59,440 INFO L132 encePairwiseOnDemand]: 26/31 looper letters, 3 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2021-10-15 19:06:59,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 104 flow [2021-10-15 19:06:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:06:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:06:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2021-10-15 19:06:59,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7677419354838709 [2021-10-15 19:06:59,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 119 transitions. [2021-10-15 19:06:59,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 119 transitions. [2021-10-15 19:06:59,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:59,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 119 transitions. [2021-10-15 19:06:59,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,449 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,449 INFO L186 Difference]: Start difference. First operand has 29 places, 25 transitions, 84 flow. Second operand 5 states and 119 transitions. [2021-10-15 19:06:59,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 104 flow [2021-10-15 19:06:59,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:59,453 INFO L242 Difference]: Finished difference. Result has 33 places, 26 transitions, 103 flow [2021-10-15 19:06:59,453 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2021-10-15 19:06:59,454 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 14 predicate places. [2021-10-15 19:06:59,454 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 103 flow [2021-10-15 19:06:59,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:59,455 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:59,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:59,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:59,669 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1475148025, now seen corresponding path program 2 times [2021-10-15 19:06:59,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:59,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650567148] [2021-10-15 19:06:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:59,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:06:59,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:59,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650567148] [2021-10-15 19:06:59,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650567148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:59,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:59,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:06:59,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453667149] [2021-10-15 19:06:59,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:59,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:59,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2021-10-15 19:06:59,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:59,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2021-10-15 19:06:59,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:59,942 INFO L129 PetriNetUnfolder]: 8/49 cut-off events. [2021-10-15 19:06:59,942 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2021-10-15 19:06:59,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 49 events. 8/49 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 86. Up to 13 conditions per place. [2021-10-15 19:06:59,945 INFO L132 encePairwiseOnDemand]: 27/31 looper letters, 12 selfloop transitions, 1 changer transitions 9/35 dead transitions. [2021-10-15 19:06:59,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 173 flow [2021-10-15 19:06:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:06:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:06:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2021-10-15 19:06:59,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5870967741935483 [2021-10-15 19:06:59,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 91 transitions. [2021-10-15 19:06:59,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 91 transitions. [2021-10-15 19:06:59,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:59,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 91 transitions. [2021-10-15 19:06:59,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,950 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,951 INFO L186 Difference]: Start difference. First operand has 33 places, 26 transitions, 103 flow. Second operand 5 states and 91 transitions. [2021-10-15 19:06:59,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 173 flow [2021-10-15 19:06:59,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 168 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:59,957 INFO L242 Difference]: Finished difference. Result has 38 places, 26 transitions, 109 flow [2021-10-15 19:06:59,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2021-10-15 19:06:59,958 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 19 predicate places. [2021-10-15 19:06:59,958 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 109 flow [2021-10-15 19:06:59,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:59,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:59,960 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:59,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:06:59,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash -919632451, now seen corresponding path program 1 times [2021-10-15 19:06:59,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:59,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664758811] [2021-10-15 19:06:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:59,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:07:00,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:00,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664758811] [2021-10-15 19:07:00,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664758811] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:00,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216053894] [2021-10-15 19:07:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:00,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:00,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:07:00,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:07:00,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:07:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:07:00,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:07:00,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:07:00,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 57 [2021-10-15 19:07:00,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:07:00,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2021-10-15 19:07:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 19:07:00,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216053894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:00,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:07:00,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-10-15 19:07:00,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380542418] [2021-10-15 19:07:00,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:07:00,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:07:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:07:00,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 31 [2021-10-15 19:07:00,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:00,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:00,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 31 [2021-10-15 19:07:00,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:00,929 INFO L129 PetriNetUnfolder]: 4/39 cut-off events. [2021-10-15 19:07:00,929 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 19:07:00,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 39 events. 4/39 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 4 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 89. Up to 17 conditions per place. [2021-10-15 19:07:00,932 INFO L132 encePairwiseOnDemand]: 26/31 looper letters, 8 selfloop transitions, 6 changer transitions 0/28 dead transitions. [2021-10-15 19:07:00,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 28 transitions, 141 flow [2021-10-15 19:07:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:07:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:07:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2021-10-15 19:07:00,937 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6 [2021-10-15 19:07:00,937 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 93 transitions. [2021-10-15 19:07:00,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 93 transitions. [2021-10-15 19:07:00,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:00,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 93 transitions. [2021-10-15 19:07:00,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:00,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:00,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:00,944 INFO L186 Difference]: Start difference. First operand has 38 places, 26 transitions, 109 flow. Second operand 5 states and 93 transitions. [2021-10-15 19:07:00,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 28 transitions, 141 flow [2021-10-15 19:07:00,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 137 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:00,953 INFO L242 Difference]: Finished difference. Result has 40 places, 28 transitions, 131 flow [2021-10-15 19:07:00,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2021-10-15 19:07:00,954 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 21 predicate places. [2021-10-15 19:07:00,954 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 131 flow [2021-10-15 19:07:00,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:00,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:00,956 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:00,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:07:01,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:01,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1616253561, now seen corresponding path program 1 times [2021-10-15 19:07:01,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:01,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809272468] [2021-10-15 19:07:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:01,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:07:01,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:01,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809272468] [2021-10-15 19:07:01,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809272468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:01,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690417818] [2021-10-15 19:07:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:01,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:01,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:07:01,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:07:01,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:07:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-15 19:07:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:07:02,442 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-15 19:07:02,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 46 [2021-10-15 19:07:02,457 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-15 19:07:02,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2021-10-15 19:07:02,734 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-15 19:07:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 41 [2021-10-15 19:07:02,742 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:07:02,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2021-10-15 19:07:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:07:02,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690417818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:02,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:07:02,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-15 19:07:02,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822246281] [2021-10-15 19:07:02,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 19:07:02,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 19:07:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2021-10-15 19:07:02,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 19:07:02,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 131 flow. Second operand has 28 states, 28 states have (on average 10.75) internal successors, (301), 28 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 19:07:02,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:02,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 19:07:02,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:04,676 INFO L129 PetriNetUnfolder]: 4/47 cut-off events. [2021-10-15 19:07:04,676 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-10-15 19:07:04,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 47 events. 4/47 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 108. Up to 12 conditions per place. [2021-10-15 19:07:04,677 INFO L132 encePairwiseOnDemand]: 20/31 looper letters, 19 selfloop transitions, 14 changer transitions 5/46 dead transitions. [2021-10-15 19:07:04,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 280 flow [2021-10-15 19:07:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:07:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:07:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 179 transitions. [2021-10-15 19:07:04,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36088709677419356 [2021-10-15 19:07:04,680 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 179 transitions. [2021-10-15 19:07:04,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 179 transitions. [2021-10-15 19:07:04,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:04,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 179 transitions. [2021-10-15 19:07:04,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 11.1875) internal successors, (179), 16 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:04,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 31.0) internal successors, (527), 17 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:04,684 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 31.0) internal successors, (527), 17 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:04,684 INFO L186 Difference]: Start difference. First operand has 40 places, 28 transitions, 131 flow. Second operand 16 states and 179 transitions. [2021-10-15 19:07:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 280 flow [2021-10-15 19:07:04,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:04,688 INFO L242 Difference]: Finished difference. Result has 61 places, 35 transitions, 203 flow [2021-10-15 19:07:04,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=203, PETRI_PLACES=61, PETRI_TRANSITIONS=35} [2021-10-15 19:07:04,688 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 42 predicate places. [2021-10-15 19:07:04,689 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 35 transitions, 203 flow [2021-10-15 19:07:04,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.75) internal successors, (301), 28 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 19:07:04,689 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:04,690 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:04,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:07:04,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:07:04,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash 750797068, now seen corresponding path program 2 times [2021-10-15 19:07:04,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:04,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101836166] [2021-10-15 19:07:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:04,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:07:05,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:05,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101836166] [2021-10-15 19:07:05,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101836166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:05,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658070810] [2021-10-15 19:07:05,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:07:05,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:05,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:07:05,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:07:05,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:07:05,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:07:05,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:07:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 113 conjunts are in the unsatisfiable core [2021-10-15 19:07:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:07:05,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:07:05,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:07:05,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-15 19:07:05,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:07:05,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:07:06,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:07:06,136 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-15 19:07:06,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 19:07:06,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:07:06,166 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-15 19:07:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 19:07:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:07:06,309 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-10-15 19:07:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2021-10-15 19:07:06,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:07:06,338 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-15 19:07:06,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 74 [2021-10-15 19:07:07,516 INFO L354 Elim1Store]: treesize reduction 178, result has 7.3 percent of original size [2021-10-15 19:07:07,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 194 treesize of output 90 [2021-10-15 19:07:07,550 INFO L354 Elim1Store]: treesize reduction 115, result has 8.7 percent of original size [2021-10-15 19:07:07,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 67 [2021-10-15 19:07:07,914 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-15 19:07:07,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 50 [2021-10-15 19:07:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:07:08,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658070810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:08,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:07:08,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2021-10-15 19:07:08,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39432494] [2021-10-15 19:07:08,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-15 19:07:08,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-15 19:07:08,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-10-15 19:07:08,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 19:07:08,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 35 transitions, 203 flow. Second operand has 33 states, 33 states have (on average 10.484848484848484) internal successors, (346), 33 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:08,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:08,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 19:07:08,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:09,383 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2021-10-15 19:07:09,384 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2021-10-15 19:07:09,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 58 events. 4/58 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 31 event pairs, 0 based on Foata normal form. 1/59 useless extension candidates. Maximal degree in co-relation 178. Up to 30 conditions per place. [2021-10-15 19:07:09,385 INFO L132 encePairwiseOnDemand]: 20/31 looper letters, 26 selfloop transitions, 8 changer transitions 8/50 dead transitions. [2021-10-15 19:07:09,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 50 transitions, 367 flow [2021-10-15 19:07:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:07:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 19:07:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 170 transitions. [2021-10-15 19:07:09,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2021-10-15 19:07:09,389 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 170 transitions. [2021-10-15 19:07:09,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 170 transitions. [2021-10-15 19:07:09,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:09,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 170 transitions. [2021-10-15 19:07:09,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.333333333333334) internal successors, (170), 15 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:09,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:09,393 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:09,393 INFO L186 Difference]: Start difference. First operand has 61 places, 35 transitions, 203 flow. Second operand 15 states and 170 transitions. [2021-10-15 19:07:09,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 50 transitions, 367 flow [2021-10-15 19:07:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 343 flow, removed 8 selfloop flow, removed 7 redundant places. [2021-10-15 19:07:09,398 INFO L242 Difference]: Finished difference. Result has 72 places, 38 transitions, 238 flow [2021-10-15 19:07:09,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=238, PETRI_PLACES=72, PETRI_TRANSITIONS=38} [2021-10-15 19:07:09,399 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 53 predicate places. [2021-10-15 19:07:09,399 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 38 transitions, 238 flow [2021-10-15 19:07:09,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.484848484848484) internal successors, (346), 33 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:09,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:09,400 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:09,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:07:09,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:09,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash 923154084, now seen corresponding path program 3 times [2021-10-15 19:07:09,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:09,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212411538] [2021-10-15 19:07:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:09,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-15 19:07:09,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:09,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212411538] [2021-10-15 19:07:09,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212411538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:09,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684258938] [2021-10-15 19:07:09,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:07:09,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:07:09,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:07:09,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:07:10,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:07:10,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:07:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:07:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:07:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-15 19:07:10,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684258938] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:10,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:07:10,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-10-15 19:07:10,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460282040] [2021-10-15 19:07:10,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:07:10,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:07:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:07:10,427 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 31 [2021-10-15 19:07:10,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 38 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:10,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:10,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 31 [2021-10-15 19:07:10,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:10,448 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-10-15 19:07:10,448 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-10-15 19:07:10,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 13 events. 0/13 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:07:10,449 INFO L132 encePairwiseOnDemand]: 28/31 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-10-15 19:07:10,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 12 transitions, 88 flow [2021-10-15 19:07:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:07:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:07:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2021-10-15 19:07:10,450 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7870967741935484 [2021-10-15 19:07:10,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 122 transitions. [2021-10-15 19:07:10,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 122 transitions. [2021-10-15 19:07:10,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:10,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 122 transitions. [2021-10-15 19:07:10,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:10,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:10,454 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:10,454 INFO L186 Difference]: Start difference. First operand has 72 places, 38 transitions, 238 flow. Second operand 5 states and 122 transitions. [2021-10-15 19:07:10,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 12 transitions, 88 flow [2021-10-15 19:07:10,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 12 transitions, 58 flow, removed 2 selfloop flow, removed 13 redundant places. [2021-10-15 19:07:10,456 INFO L242 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2021-10-15 19:07:10,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2021-10-15 19:07:10,456 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 17 predicate places. [2021-10-15 19:07:10,457 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2021-10-15 19:07:10,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:10,461 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:07:10,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-15 19:07:10,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:10,668 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:07:10,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:07:10 BoogieIcfgContainer [2021-10-15 19:07:10,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:07:10,672 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:07:10,672 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:07:10,672 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:07:10,672 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:57" (3/4) ... [2021-10-15 19:07:10,675 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:07:10,691 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 19:07:10,691 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-15 19:07:10,691 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:07:10,692 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:07:10,724 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:07:10,724 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:07:10,725 INFO L168 Benchmark]: Toolchain (without parser) took 14382.03 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 78.2 MB in the beginning and 50.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 77.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:10,725 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 111.1 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:07:10,726 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.08 ms. Allocated memory is still 111.1 MB. Free memory was 78.2 MB in the beginning and 77.4 MB in the end (delta: 768.5 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:10,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.07 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 75.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:10,727 INFO L168 Benchmark]: Boogie Preprocessor took 35.34 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 73.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:10,727 INFO L168 Benchmark]: RCFGBuilder took 527.66 ms. Allocated memory is still 111.1 MB. Free memory was 73.7 MB in the beginning and 61.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:10,728 INFO L168 Benchmark]: TraceAbstraction took 13071.09 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 61.1 MB in the beginning and 53.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 59.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:10,728 INFO L168 Benchmark]: Witness Printer took 52.64 ms. Allocated memory is still 161.5 MB. Free memory was 53.5 MB in the beginning and 50.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:10,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 111.1 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 623.08 ms. Allocated memory is still 111.1 MB. Free memory was 78.2 MB in the beginning and 77.4 MB in the end (delta: 768.5 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.07 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 75.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.34 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 73.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 527.66 ms. Allocated memory is still 111.1 MB. Free memory was 73.7 MB in the beginning and 61.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13071.09 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 61.1 MB in the beginning and 53.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 59.2 MB. Max. memory is 16.1 GB. * Witness Printer took 52.64 ms. Allocated memory is still 161.5 MB. Free memory was 53.5 MB in the beginning and 50.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 619]: 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, 23 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13013.0ms, OverallIterations: 9, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 3877.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 261 SDslu, 125 SDs, 0 SdLazy, 822 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 874.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 4462.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred in iteration=8, InterpolantAutomatonStates: 62, 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: 167.4ms SsaConstructionTime, 1075.2ms SatisfiabilityAnalysisTime, 5665.6ms InterpolantComputationTime, 415 NumberOfCodeBlocks, 413 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 400 ConstructedInterpolants, 4 QuantifiedInterpolants, 3780 SizeOfPredicates, 77 NumberOfNonLiveVariables, 1260 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 199/271 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 19:07:10,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a51a4570-b718-4a84-8db0-d365d700f971/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...