./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/even.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/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_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invariants/even.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/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_58e56028-c439-4196-a412-3916b1525436/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 646c8f57db5f337253f8004dffb03bb18ecf1769 .................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:15:14,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:15:14,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:15:14,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:15:14,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:15:14,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:15:14,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:15:14,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:15:14,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:15:14,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:15:14,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:15:14,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:15:14,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:15:14,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:15:14,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:15:14,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:15:14,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:15:14,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:15:14,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:15:14,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:15:14,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:15:14,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:15:14,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:15:14,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:15:14,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:15:14,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:15:14,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:15:14,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:15:14,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:15:14,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:15:14,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:15:14,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:15:14,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:15:14,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:15:14,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:15:14,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:15:14,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:15:14,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:15:14,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:15:14,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:15:14,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:15:14,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:15:14,901 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:15:14,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:15:14,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:15:14,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:15:14,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:15:14,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:15:14,905 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:15:14,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:15:14,906 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:15:14,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:15:14,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:15:14,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:15:14,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:15:14,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:15:14,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:15:14,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:15:14,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:15:14,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:15:14,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:15:14,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:15:14,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:15:14,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:15:14,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:15:14,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:15:14,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:15:14,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:15:14,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:15:14,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:15:14,913 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:15:14,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:15:14,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:15:14,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:15:14,916 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_58e56028-c439-4196-a412-3916b1525436/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 646c8f57db5f337253f8004dffb03bb18ecf1769 [2021-10-15 20:15:15,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:15:15,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:15:15,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:15:15,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:15:15,267 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:15:15,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-invariants/even.c [2021-10-15 20:15:15,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/data/afdcdfbe3/81f9bb30572643b38d8a64e35c09beaf/FLAG781900c84 [2021-10-15 20:15:16,026 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:15:16,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/sv-benchmarks/c/loop-invariants/even.c [2021-10-15 20:15:16,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/data/afdcdfbe3/81f9bb30572643b38d8a64e35c09beaf/FLAG781900c84 [2021-10-15 20:15:16,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/data/afdcdfbe3/81f9bb30572643b38d8a64e35c09beaf [2021-10-15 20:15:16,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:15:16,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:15:16,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:15:16,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:15:16,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:15:16,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc21285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16, skipping insertion in model container [2021-10-15 20:15:16,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:15:16,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:15:16,607 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_58e56028-c439-4196-a412-3916b1525436/sv-benchmarks/c/loop-invariants/even.c[351,364] [2021-10-15 20:15:16,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:15:16,640 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:15:16,662 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_58e56028-c439-4196-a412-3916b1525436/sv-benchmarks/c/loop-invariants/even.c[351,364] [2021-10-15 20:15:16,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:15:16,691 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:15:16,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16 WrapperNode [2021-10-15 20:15:16,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:15:16,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:15:16,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:15:16,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:15:16,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:15:16,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:15:16,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:15:16,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:15:16,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:15:16,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:15:16,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:15:16,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:15:16,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (1/1) ... [2021-10-15 20:15:16,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:15:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:16,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:15:16,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:15:16,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:15:16,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:15:16,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:15:16,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:15:17,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:15:17,141 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:15:17,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:15:17 BoogieIcfgContainer [2021-10-15 20:15:17,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:15:17,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:15:17,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:15:17,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:15:17,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:15:16" (1/3) ... [2021-10-15 20:15:17,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6cc0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:15:17, skipping insertion in model container [2021-10-15 20:15:17,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:16" (2/3) ... [2021-10-15 20:15:17,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6cc0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:15:17, skipping insertion in model container [2021-10-15 20:15:17,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:15:17" (3/3) ... [2021-10-15 20:15:17,155 INFO L111 eAbstractionObserver]: Analyzing ICFG even.c [2021-10-15 20:15:17,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:15:17,162 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:15:17,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:15:17,233 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:15:17,233 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:15:17,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 20:15:17,269 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-10-15 20:15:17,269 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:17,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 14 events. 3/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 20:15:17,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 20:15:17,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 8 places, 9 transitions, 18 flow [2021-10-15 20:15:17,279 INFO L129 PetriNetUnfolder]: 2/8 cut-off events. [2021-10-15 20:15:17,279 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:17,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:17,281 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:15:17,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2021-10-15 20:15:17,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:17,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522985795] [2021-10-15 20:15:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:17,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:17,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:17,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522985795] [2021-10-15 20:15:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522985795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:17,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:17,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:15:17,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521375250] [2021-10-15 20:15:17,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:15:17,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:15:17,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:15:17,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 14 [2021-10-15 20:15:17,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 8 places, 9 transitions, 18 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:17,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 14 [2021-10-15 20:15:17,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:17,581 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-10-15 20:15:17,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:17,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10 conditions, 8 events. 1/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 8. Up to 2 conditions per place. [2021-10-15 20:15:17,585 INFO L132 encePairwiseOnDemand]: 13/14 looper letters, 0 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2021-10-15 20:15:17,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 9 places, 8 transitions, 16 flow [2021-10-15 20:15:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:15:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:15:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 25 transitions. [2021-10-15 20:15:17,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-10-15 20:15:17,602 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 25 transitions. [2021-10-15 20:15:17,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 25 transitions. [2021-10-15 20:15:17,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:17,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 25 transitions. [2021-10-15 20:15:17,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,615 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,618 INFO L186 Difference]: Start difference. First operand has 8 places, 9 transitions, 18 flow. Second operand 2 states and 25 transitions. [2021-10-15 20:15:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 9 places, 8 transitions, 16 flow [2021-10-15 20:15:17,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 9 places, 8 transitions, 16 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:17,627 INFO L242 Difference]: Finished difference. Result has 9 places, 8 transitions, 16 flow [2021-10-15 20:15:17,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=9, PETRI_TRANSITIONS=8} [2021-10-15 20:15:17,630 INFO L334 CegarLoopForPetriNet]: 8 programPoint places, 1 predicate places. [2021-10-15 20:15:17,631 INFO L470 AbstractCegarLoop]: Abstraction has has 9 places, 8 transitions, 16 flow [2021-10-15 20:15:17,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:17,633 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:17,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:15:17,634 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1806847180, now seen corresponding path program 1 times [2021-10-15 20:15:17,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:17,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544079797] [2021-10-15 20:15:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:17,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:17,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:17,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544079797] [2021-10-15 20:15:17,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544079797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:17,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:17,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:15:17,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425837728] [2021-10-15 20:15:17,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:15:17,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:15:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:15:17,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 14 [2021-10-15 20:15:17,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 9 places, 8 transitions, 16 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:17,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 14 [2021-10-15 20:15:17,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:17,865 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-10-15 20:15:17,865 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:17,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 12 events. 1/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 18. Up to 5 conditions per place. [2021-10-15 20:15:17,866 INFO L132 encePairwiseOnDemand]: 10/14 looper letters, 3 selfloop transitions, 2 changer transitions 1/10 dead transitions. [2021-10-15 20:15:17,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 32 flow [2021-10-15 20:15:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:15:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:15:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 35 transitions. [2021-10-15 20:15:17,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.625 [2021-10-15 20:15:17,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 35 transitions. [2021-10-15 20:15:17,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 35 transitions. [2021-10-15 20:15:17,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:17,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 35 transitions. [2021-10-15 20:15:17,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,871 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,872 INFO L186 Difference]: Start difference. First operand has 9 places, 8 transitions, 16 flow. Second operand 4 states and 35 transitions. [2021-10-15 20:15:17,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 32 flow [2021-10-15 20:15:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 32 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:17,874 INFO L242 Difference]: Finished difference. Result has 14 places, 9 transitions, 30 flow [2021-10-15 20:15:17,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=30, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2021-10-15 20:15:17,875 INFO L334 CegarLoopForPetriNet]: 8 programPoint places, 6 predicate places. [2021-10-15 20:15:17,875 INFO L470 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 30 flow [2021-10-15 20:15:17,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:17,876 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:17,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:15:17,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1262026695, now seen corresponding path program 1 times [2021-10-15 20:15:17,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:17,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438415957] [2021-10-15 20:15:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:17,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:18,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:18,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438415957] [2021-10-15 20:15:18,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438415957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:18,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215266002] [2021-10-15 20:15:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:18,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:18,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:18,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:18,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:15:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:18,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:15:18,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215266002] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:18,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:18,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-15 20:15:18,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985386495] [2021-10-15 20:15:18,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:15:18,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:15:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:15:18,371 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 14 [2021-10-15 20:15:18,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 30 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:18,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:18,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 14 [2021-10-15 20:15:18,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:18,415 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-10-15 20:15:18,415 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 20:15:18,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 13 events. 1/13 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/15 useless extension candidates. Maximal degree in co-relation 26. Up to 6 conditions per place. [2021-10-15 20:15:18,416 INFO L132 encePairwiseOnDemand]: 10/14 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-10-15 20:15:18,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 9 transitions, 44 flow [2021-10-15 20:15:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:15:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:15:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 57 transitions. [2021-10-15 20:15:18,419 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2021-10-15 20:15:18,419 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 57 transitions. [2021-10-15 20:15:18,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 57 transitions. [2021-10-15 20:15:18,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:18,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 57 transitions. [2021-10-15 20:15:18,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:18,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:18,423 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:18,424 INFO L186 Difference]: Start difference. First operand has 14 places, 9 transitions, 30 flow. Second operand 7 states and 57 transitions. [2021-10-15 20:15:18,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 9 transitions, 44 flow [2021-10-15 20:15:18,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 42 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:15:18,426 INFO L242 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2021-10-15 20:15:18,427 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2021-10-15 20:15:18,427 INFO L334 CegarLoopForPetriNet]: 8 programPoint places, 8 predicate places. [2021-10-15 20:15:18,427 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2021-10-15 20:15:18,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:18,430 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:15:18,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:18,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:18,650 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:15:18,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:15:18 BoogieIcfgContainer [2021-10-15 20:15:18,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:15:18,661 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:15:18,661 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:15:18,661 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:15:18,662 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:15:17" (3/4) ... [2021-10-15 20:15:18,666 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:15:18,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-15 20:15:18,679 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-15 20:15:18,679 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-15 20:15:18,680 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:18,680 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:18,734 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:15:18,734 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:15:18,736 INFO L168 Benchmark]: Toolchain (without parser) took 2343.47 ms. Allocated memory was 88.1 MB in the beginning and 123.7 MB in the end (delta: 35.7 MB). Free memory was 55.9 MB in the beginning and 88.9 MB in the end (delta: -33.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:18,737 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:18,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.54 ms. Allocated memory was 88.1 MB in the beginning and 123.7 MB in the end (delta: 35.7 MB). Free memory was 55.8 MB in the beginning and 100.4 MB in the end (delta: -44.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:18,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.20 ms. Allocated memory is still 123.7 MB. Free memory was 100.4 MB in the beginning and 98.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:18,741 INFO L168 Benchmark]: Boogie Preprocessor took 43.04 ms. Allocated memory is still 123.7 MB. Free memory was 98.8 MB in the beginning and 97.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:18,742 INFO L168 Benchmark]: RCFGBuilder took 354.47 ms. Allocated memory is still 123.7 MB. Free memory was 97.8 MB in the beginning and 88.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:18,742 INFO L168 Benchmark]: TraceAbstraction took 1512.74 ms. Allocated memory is still 123.7 MB. Free memory was 88.3 MB in the beginning and 91.5 MB in the end (delta: -3.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:18,743 INFO L168 Benchmark]: Witness Printer took 73.67 ms. Allocated memory is still 123.7 MB. Free memory was 91.5 MB in the beginning and 88.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:18,747 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 298.54 ms. Allocated memory was 88.1 MB in the beginning and 123.7 MB in the end (delta: 35.7 MB). Free memory was 55.8 MB in the beginning and 100.4 MB in the end (delta: -44.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.20 ms. Allocated memory is still 123.7 MB. Free memory was 100.4 MB in the beginning and 98.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.04 ms. Allocated memory is still 123.7 MB. Free memory was 98.8 MB in the beginning and 97.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 354.47 ms. Allocated memory is still 123.7 MB. Free memory was 97.8 MB in the beginning and 88.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1512.74 ms. Allocated memory is still 123.7 MB. Free memory was 88.3 MB in the beginning and 91.5 MB in the end (delta: -3.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 73.67 ms. Allocated memory is still 123.7 MB. Free memory was 91.5 MB in the beginning and 88.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: 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, 12 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1431.4ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 174.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 4 SDslu, 3 SDs, 0 SdLazy, 18 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 91.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 13, 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: 30.3ms SsaConstructionTime, 169.3ms SatisfiabilityAnalysisTime, 546.3ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 SizeOfPredicates, 2 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 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 20:15:18,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58e56028-c439-4196-a412-3916b1525436/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...