./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s52iff.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_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/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_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s52iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/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_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/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 0faaa8d120428ed7604b6b4c759776b69e800fbd ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:09:03,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:09:03,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:09:03,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:09:03,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:09:03,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:09:03,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:09:03,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:09:03,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:09:03,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:09:03,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:09:03,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:09:03,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:09:03,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:09:03,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:09:03,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:09:03,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:09:03,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:09:03,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:09:03,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:09:03,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:09:03,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:09:03,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:09:03,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:09:03,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:09:03,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:09:03,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:09:03,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:09:03,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:09:03,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:09:03,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:09:03,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:09:03,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:09:03,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:09:03,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:09:03,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:09:03,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:09:03,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:09:03,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:09:03,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:09:03,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:09:03,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:09:03,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:09:03,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:09:03,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:09:03,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:09:03,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:09:03,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:09:03,524 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:09:03,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:09:03,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:09:03,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:09:03,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:09:03,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:09:03,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:09:03,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:09:03,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:09:03,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:09:03,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:09:03,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:09:03,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:09:03,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:09:03,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:09:03,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:09:03,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:03,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:09:03,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:09:03,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:09:03,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:09:03,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:09:03,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:09:03,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:09:03,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:09:03,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:09:03,532 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_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0faaa8d120428ed7604b6b4c759776b69e800fbd [2021-10-15 20:09:03,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:09:03,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:09:03,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:09:03,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:09:03,849 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:09:03,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-fpi/s52iff.c [2021-10-15 20:09:03,916 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/data/4617e4549/6e9f1900075c495eaaf6d70ca445d057/FLAGd9f46d31a [2021-10-15 20:09:04,390 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:09:04,391 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/sv-benchmarks/c/array-fpi/s52iff.c [2021-10-15 20:09:04,397 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/data/4617e4549/6e9f1900075c495eaaf6d70ca445d057/FLAGd9f46d31a [2021-10-15 20:09:04,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/data/4617e4549/6e9f1900075c495eaaf6d70ca445d057 [2021-10-15 20:09:04,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:09:04,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:09:04,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:04,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:09:04,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:09:04,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:04" (1/1) ... [2021-10-15 20:09:04,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a5528c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:04, skipping insertion in model container [2021-10-15 20:09:04,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:04" (1/1) ... [2021-10-15 20:09:04,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:09:04,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:09:04,979 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_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/sv-benchmarks/c/array-fpi/s52iff.c[589,602] [2021-10-15 20:09:05,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:05,028 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:09:05,043 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_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/sv-benchmarks/c/array-fpi/s52iff.c[589,602] [2021-10-15 20:09:05,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:05,087 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:09:05,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05 WrapperNode [2021-10-15 20:09:05,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:05,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:09:05,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:09:05,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:09:05,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:09:05,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:09:05,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:09:05,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:09:05,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:09:05,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:09:05,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:09:05,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:09:05,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (1/1) ... [2021-10-15 20:09:05,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:05,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:05,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:09:05,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:09:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:09:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:09:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:09:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:09:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:09:05,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:09:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:09:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:09:05,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:09:05,619 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-15 20:09:05,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:05 BoogieIcfgContainer [2021-10-15 20:09:05,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:09:05,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:09:05,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:09:05,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:09:05,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:09:04" (1/3) ... [2021-10-15 20:09:05,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d316cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:05, skipping insertion in model container [2021-10-15 20:09:05,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:05" (2/3) ... [2021-10-15 20:09:05,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d316cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:05, skipping insertion in model container [2021-10-15 20:09:05,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:05" (3/3) ... [2021-10-15 20:09:05,629 INFO L111 eAbstractionObserver]: Analyzing ICFG s52iff.c [2021-10-15 20:09:05,634 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:09:05,635 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:09:05,681 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:09:05,687 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 20:09:05,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:09:05,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 33 transitions, 66 flow [2021-10-15 20:09:05,720 INFO L129 PetriNetUnfolder]: 11/33 cut-off events. [2021-10-15 20:09:05,720 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:05,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 33 events. 11/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 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 20:09:05,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 33 transitions, 66 flow [2021-10-15 20:09:05,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 27 transitions, 54 flow [2021-10-15 20:09:05,732 INFO L129 PetriNetUnfolder]: 9/26 cut-off events. [2021-10-15 20:09:05,732 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:05,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:05,733 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:05,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1021291654, now seen corresponding path program 1 times [2021-10-15 20:09:05,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:05,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29923711] [2021-10-15 20:09:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:05,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:05,915 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 20:09:05,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:05,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29923711] [2021-10-15 20:09:05,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29923711] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:05,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:05,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:09:05,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381857007] [2021-10-15 20:09:05,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:09:05,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:09:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:09:05,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 33 [2021-10-15 20:09:05,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 27 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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 20:09:05,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:05,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 33 [2021-10-15 20:09:05,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:05,957 INFO L129 PetriNetUnfolder]: 5/23 cut-off events. [2021-10-15 20:09:05,957 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:05,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 23 events. 5/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 4/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2021-10-15 20:09:05,959 INFO L132 encePairwiseOnDemand]: 29/33 looper letters, 0 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2021-10-15 20:09:05,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:09:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:09:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 60 transitions. [2021-10-15 20:09:05,971 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2021-10-15 20:09:05,972 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 60 transitions. [2021-10-15 20:09:05,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 60 transitions. [2021-10-15 20:09:05,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:05,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 60 transitions. [2021-10-15 20:09:05,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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 20:09:05,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 20:09:05,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 20:09:05,984 INFO L186 Difference]: Start difference. First operand has 19 places, 27 transitions, 54 flow. Second operand 2 states and 60 transitions. [2021-10-15 20:09:05,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:05,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:09:05,988 INFO L242 Difference]: Finished difference. Result has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:05,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=23} [2021-10-15 20:09:05,991 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-10-15 20:09:05,991 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:05,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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 20:09:05,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:05,992 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:05,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:09:05,993 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-10-15 20:09:05,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:05,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773519174] [2021-10-15 20:09:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:05,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:06,070 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 20:09:06,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:06,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773519174] [2021-10-15 20:09:06,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773519174] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:06,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:06,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:09:06,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298185451] [2021-10-15 20:09:06,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:09:06,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:09:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:09:06,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2021-10-15 20:09:06,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 23 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 20:09:06,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:06,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2021-10-15 20:09:06,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:06,178 INFO L129 PetriNetUnfolder]: 7/33 cut-off events. [2021-10-15 20:09:06,178 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:06,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 33 events. 7/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 63. Up to 18 conditions per place. [2021-10-15 20:09:06,179 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 23 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2021-10-15 20:09:06,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 33 transitions, 126 flow [2021-10-15 20:09:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:09:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:09:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2021-10-15 20:09:06,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2021-10-15 20:09:06,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 61 transitions. [2021-10-15 20:09:06,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 61 transitions. [2021-10-15 20:09:06,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:06,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 61 transitions. [2021-10-15 20:09:06,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 20:09:06,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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 20:09:06,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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 20:09:06,185 INFO L186 Difference]: Start difference. First operand has 20 places, 23 transitions, 46 flow. Second operand 4 states and 61 transitions. [2021-10-15 20:09:06,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 33 transitions, 126 flow [2021-10-15 20:09:06,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 33 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:09:06,200 INFO L242 Difference]: Finished difference. Result has 24 places, 26 transitions, 84 flow [2021-10-15 20:09:06,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=24, PETRI_TRANSITIONS=26} [2021-10-15 20:09:06,201 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2021-10-15 20:09:06,201 INFO L470 AbstractCegarLoop]: Abstraction has has 24 places, 26 transitions, 84 flow [2021-10-15 20:09:06,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 20:09:06,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:06,202 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:06,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:09:06,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1592625659, now seen corresponding path program 1 times [2021-10-15 20:09:06,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:06,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548251143] [2021-10-15 20:09:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:06,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:06,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:06,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900203035] [2021-10-15 20:09:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:06,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:06,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:06,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:06,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:09:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:06,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:09:06,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:06,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-15 20:09:06,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 20:09:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:09:06,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:06,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548251143] [2021-10-15 20:09:06,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:06,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900203035] [2021-10-15 20:09:06,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900203035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:06,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:09:06,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:09:06,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542190035] [2021-10-15 20:09:06,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:09:06,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:09:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:09:06,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2021-10-15 20:09:06,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 26 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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 20:09:06,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:06,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2021-10-15 20:09:06,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:06,758 INFO L129 PetriNetUnfolder]: 6/32 cut-off events. [2021-10-15 20:09:06,758 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 20:09:06,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 32 events. 6/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 76. Up to 20 conditions per place. [2021-10-15 20:09:06,759 INFO L132 encePairwiseOnDemand]: 25/33 looper letters, 18 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2021-10-15 20:09:06,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 140 flow [2021-10-15 20:09:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:09:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:09:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2021-10-15 20:09:06,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2021-10-15 20:09:06,762 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 79 transitions. [2021-10-15 20:09:06,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 79 transitions. [2021-10-15 20:09:06,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:06,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 79 transitions. [2021-10-15 20:09:06,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 20:09:06,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 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 20:09:06,766 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 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 20:09:06,766 INFO L186 Difference]: Start difference. First operand has 24 places, 26 transitions, 84 flow. Second operand 6 states and 79 transitions. [2021-10-15 20:09:06,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 140 flow [2021-10-15 20:09:06,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:09:06,770 INFO L242 Difference]: Finished difference. Result has 30 places, 29 transitions, 114 flow [2021-10-15 20:09:06,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2021-10-15 20:09:06,770 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 11 predicate places. [2021-10-15 20:09:06,770 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 114 flow [2021-10-15 20:09:06,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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 20:09:06,771 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:06,771 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:06,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:06,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:06,995 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:06,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-10-15 20:09:06,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:06,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079433060] [2021-10-15 20:09:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:06,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:07,022 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:07,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279631907] [2021-10-15 20:09:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:07,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:07,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:07,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:09:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:09:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:07,260 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-15 20:09:07,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 20:09:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:09:07,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:07,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079433060] [2021-10-15 20:09:07,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:07,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279631907] [2021-10-15 20:09:07,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279631907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:07,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:09:07,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:09:07,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774003715] [2021-10-15 20:09:07,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:09:07,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:09:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:09:07,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2021-10-15 20:09:07,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 114 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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 20:09:07,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:07,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2021-10-15 20:09:07,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:07,486 INFO L129 PetriNetUnfolder]: 8/39 cut-off events. [2021-10-15 20:09:07,487 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 20:09:07,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 39 events. 8/39 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 107. Up to 18 conditions per place. [2021-10-15 20:09:07,488 INFO L132 encePairwiseOnDemand]: 21/33 looper letters, 22 selfloop transitions, 13 changer transitions 0/39 dead transitions. [2021-10-15 20:09:07,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 214 flow [2021-10-15 20:09:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:09:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:09:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2021-10-15 20:09:07,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2021-10-15 20:09:07,492 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 108 transitions. [2021-10-15 20:09:07,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 108 transitions. [2021-10-15 20:09:07,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:07,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 108 transitions. [2021-10-15 20:09:07,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 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 20:09:07,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 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 20:09:07,496 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 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 20:09:07,496 INFO L186 Difference]: Start difference. First operand has 30 places, 29 transitions, 114 flow. Second operand 8 states and 108 transitions. [2021-10-15 20:09:07,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 214 flow [2021-10-15 20:09:07,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:09:07,500 INFO L242 Difference]: Finished difference. Result has 38 places, 34 transitions, 172 flow [2021-10-15 20:09:07,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2021-10-15 20:09:07,501 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 19 predicate places. [2021-10-15 20:09:07,501 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 172 flow [2021-10-15 20:09:07,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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 20:09:07,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:07,502 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:07,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:07,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:07,722 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-10-15 20:09:07,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:07,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578332181] [2021-10-15 20:09:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:07,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:09:07,783 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:09:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:09:07,845 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:09:07,845 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:09:07,846 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:09:07,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:09:07,855 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:09:07,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:09:07 BoogieIcfgContainer [2021-10-15 20:09:07,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:09:07,890 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:09:07,890 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:09:07,891 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:09:07,891 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:05" (3/4) ... [2021-10-15 20:09:07,893 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 20:09:07,947 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e72a00b-8f00-4b9e-b261-fa1f9c8029ac/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:09:07,948 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:09:07,949 INFO L168 Benchmark]: Toolchain (without parser) took 3168.96 ms. Allocated memory is still 109.1 MB. Free memory was 73.6 MB in the beginning and 72.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 626.5 kB. Max. memory is 16.1 GB. [2021-10-15 20:09:07,950 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 90.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:07,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.78 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 85.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:07,951 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.60 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 84.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:07,952 INFO L168 Benchmark]: Boogie Preprocessor took 47.84 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 82.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:07,953 INFO L168 Benchmark]: RCFGBuilder took 426.77 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 71.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:07,953 INFO L168 Benchmark]: TraceAbstraction took 2267.09 ms. Allocated memory is still 109.1 MB. Free memory was 71.1 MB in the beginning and 74.2 MB in the end (delta: -3.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:07,954 INFO L168 Benchmark]: Witness Printer took 57.30 ms. Allocated memory is still 109.1 MB. Free memory was 74.2 MB in the beginning and 72.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:07,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 90.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.78 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 85.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.60 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 84.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.84 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 82.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 426.77 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 71.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2267.09 ms. Allocated memory is still 109.1 MB. Free memory was 71.1 MB in the beginning and 74.2 MB in the end (delta: -3.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 57.30 ms. Allocated memory is still 109.1 MB. Free memory was 74.2 MB in the beginning and 72.1 MB in the end (delta: 2.1 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=1] [L32] COND TRUE i