./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-iff.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_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/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_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/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_706b0e0b-0ea7-4f69-99e4-70987981999c/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 4e11665f1fb34385e5a13a8ae204131e2123894d ................................................................................................................................................................................................................................................................................................................................................................................................. 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 20:09:05,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:09:05,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:09:05,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:09:05,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:09:05,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:09:05,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:09:05,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:09:05,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:09:05,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:09:05,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:09:05,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:09:05,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:09:05,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:09:05,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:09:05,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:09:05,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:09:05,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:09:05,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:09:05,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:09:05,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:09:05,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:09:05,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:09:05,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:09:05,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:09:05,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:09:05,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:09:05,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:09:05,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:09:05,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:09:05,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:09:05,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:09:05,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:09:05,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:09:05,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:09:05,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:09:05,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:09:05,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:09:05,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:09:05,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:09:05,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:09:05,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:09:05,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:09:05,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:09:05,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:09:05,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:09:05,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:09:05,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:09:05,474 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:09:05,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:09:05,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:09:05,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:09:05,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:09:05,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:09:05,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:09:05,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:09:05,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:09:05,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:09:05,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:09:05,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:09:05,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:09:05,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:09:05,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:09:05,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:09:05,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:05,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:09:05,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:09:05,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:09:05,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:09:05,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:09:05,482 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:09:05,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:09:05,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:09:05,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:09:05,483 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_706b0e0b-0ea7-4f69-99e4-70987981999c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e11665f1fb34385e5a13a8ae204131e2123894d [2021-10-15 20:09:05,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:09:05,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:09:05,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:09:05,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:09:05,873 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:09:05,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-fpi/nsqm-iff.c [2021-10-15 20:09:05,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/data/e0e688425/6cea048d23374c6a9cbee7b4a8cefdfb/FLAG62415289b [2021-10-15 20:09:06,537 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:09:06,538 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/sv-benchmarks/c/array-fpi/nsqm-iff.c [2021-10-15 20:09:06,546 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/data/e0e688425/6cea048d23374c6a9cbee7b4a8cefdfb/FLAG62415289b [2021-10-15 20:09:06,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/data/e0e688425/6cea048d23374c6a9cbee7b4a8cefdfb [2021-10-15 20:09:06,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:09:06,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:09:06,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:06,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:09:06,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:09:06,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:06" (1/1) ... [2021-10-15 20:09:06,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d03b772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:06, skipping insertion in model container [2021-10-15 20:09:06,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:06" (1/1) ... [2021-10-15 20:09:06,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:09:06,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:09:07,162 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_706b0e0b-0ea7-4f69-99e4-70987981999c/sv-benchmarks/c/array-fpi/nsqm-iff.c[591,604] [2021-10-15 20:09:07,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:07,196 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:09:07,212 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_706b0e0b-0ea7-4f69-99e4-70987981999c/sv-benchmarks/c/array-fpi/nsqm-iff.c[591,604] [2021-10-15 20:09:07,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:07,240 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:09:07,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07 WrapperNode [2021-10-15 20:09:07,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:07,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:09:07,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:09:07,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:09:07,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:09:07,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:09:07,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:09:07,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:09:07,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:09:07,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:09:07,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:09:07,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:09:07,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (1/1) ... [2021-10-15 20:09:07,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:07,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:07,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:09:07,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:09:07,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:09:07,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:09:07,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:09:07,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:09:07,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:09:07,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:09:07,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:09:07,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:09:07,726 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-15 20:09:07,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:07 BoogieIcfgContainer [2021-10-15 20:09:07,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:09:07,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:09:07,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:09:07,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:09:07,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:09:06" (1/3) ... [2021-10-15 20:09:07,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca8e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:07, skipping insertion in model container [2021-10-15 20:09:07,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:07" (2/3) ... [2021-10-15 20:09:07,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca8e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:07, skipping insertion in model container [2021-10-15 20:09:07,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:07" (3/3) ... [2021-10-15 20:09:07,739 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2021-10-15 20:09:07,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:09:07,746 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:09:07,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:09:07,823 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 20:09:07,823 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:09:07,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 33 transitions, 66 flow [2021-10-15 20:09:07,866 INFO L129 PetriNetUnfolder]: 11/33 cut-off events. [2021-10-15 20:09:07,866 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:07,869 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 31 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 20:09:07,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 33 transitions, 66 flow [2021-10-15 20:09:07,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 27 transitions, 54 flow [2021-10-15 20:09:07,885 INFO L129 PetriNetUnfolder]: 9/26 cut-off events. [2021-10-15 20:09:07,885 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:07,886 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:07,886 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:07,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:07,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:07,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1680474948, now seen corresponding path program 1 times [2021-10-15 20:09:07,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:07,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100785668] [2021-10-15 20:09:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:07,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:08,118 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 20:09:08,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:08,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100785668] [2021-10-15 20:09:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100785668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:08,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:08,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:09:08,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143242769] [2021-10-15 20:09:08,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:09:08,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:09:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:09:08,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 33 [2021-10-15 20:09:08,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 27 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 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 20:09:08,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:08,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 33 [2021-10-15 20:09:08,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:08,179 INFO L129 PetriNetUnfolder]: 5/23 cut-off events. [2021-10-15 20:09:08,180 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:08,181 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 17 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 20:09:08,183 INFO L132 encePairwiseOnDemand]: 29/33 looper letters, 0 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2021-10-15 20:09:08,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:09:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:09:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 60 transitions. [2021-10-15 20:09:08,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2021-10-15 20:09:08,206 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 60 transitions. [2021-10-15 20:09:08,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 60 transitions. [2021-10-15 20:09:08,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:08,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 60 transitions. [2021-10-15 20:09:08,220 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 20:09:08,227 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 20:09:08,228 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 20:09:08,231 INFO L186 Difference]: Start difference. First operand has 19 places, 27 transitions, 54 flow. Second operand 2 states and 60 transitions. [2021-10-15 20:09:08,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:08,241 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 20:09:08,247 INFO L242 Difference]: Finished difference. Result has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:08,250 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 20:09:08,252 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-10-15 20:09:08,254 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 23 transitions, 46 flow [2021-10-15 20:09:08,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 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 20:09:08,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:08,256 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:08,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:09:08,257 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:08,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-15 20:09:08,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:08,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350392027] [2021-10-15 20:09:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:08,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:08,431 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 20:09:08,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:08,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350392027] [2021-10-15 20:09:08,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350392027] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:08,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:08,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:09:08,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774627851] [2021-10-15 20:09:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:09:08,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:09:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:09:08,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2021-10-15 20:09:08,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 23 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 20:09:08,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:08,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2021-10-15 20:09:08,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:08,542 INFO L129 PetriNetUnfolder]: 5/35 cut-off events. [2021-10-15 20:09:08,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:08,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 35 events. 5/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 61. Up to 14 conditions per place. [2021-10-15 20:09:08,544 INFO L132 encePairwiseOnDemand]: 20/33 looper letters, 17 selfloop transitions, 9 changer transitions 0/31 dead transitions. [2021-10-15 20:09:08,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 114 flow [2021-10-15 20:09:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:09:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:09:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2021-10-15 20:09:08,547 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2021-10-15 20:09:08,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 62 transitions. [2021-10-15 20:09:08,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 62 transitions. [2021-10-15 20:09:08,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:08,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 62 transitions. [2021-10-15 20:09:08,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 20:09:08,552 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 20:09:08,553 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 20:09:08,553 INFO L186 Difference]: Start difference. First operand has 20 places, 23 transitions, 46 flow. Second operand 4 states and 62 transitions. [2021-10-15 20:09:08,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 114 flow [2021-10-15 20:09:08,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 31 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:09:08,557 INFO L242 Difference]: Finished difference. Result has 25 places, 28 transitions, 109 flow [2021-10-15 20:09:08,558 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=25, PETRI_TRANSITIONS=28} [2021-10-15 20:09:08,559 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 6 predicate places. [2021-10-15 20:09:08,559 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 28 transitions, 109 flow [2021-10-15 20:09:08,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 20:09:08,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:08,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:08,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:09:08,561 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-15 20:09:08,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:08,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790164273] [2021-10-15 20:09:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:08,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:08,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:08,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176816709] [2021-10-15 20:09:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:08,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:08,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:08,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:08,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:09:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:09:08,689 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:09:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:09:08,747 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:09:08,747 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:09:08,748 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:09:08,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:08,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:08,981 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:09:09,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:09:09 BoogieIcfgContainer [2021-10-15 20:09:09,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:09:09,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:09:09,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:09:09,049 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:09:09,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:07" (3/4) ... [2021-10-15 20:09:09,052 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 20:09:09,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_706b0e0b-0ea7-4f69-99e4-70987981999c/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:09:09,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:09:09,141 INFO L168 Benchmark]: Toolchain (without parser) took 2260.13 ms. Allocated memory is still 113.2 MB. Free memory was 77.5 MB in the beginning and 73.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 3.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:09,142 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory was 93.7 MB in the beginning and 93.6 MB in the end (delta: 55.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:09,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.42 ms. Allocated memory is still 113.2 MB. Free memory was 77.3 MB in the beginning and 89.2 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:09,150 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.38 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:09,150 INFO L168 Benchmark]: Boogie Preprocessor took 34.06 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 86.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:09,159 INFO L168 Benchmark]: RCFGBuilder took 404.08 ms. Allocated memory is still 113.2 MB. Free memory was 86.4 MB in the beginning and 75.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:09,160 INFO L168 Benchmark]: TraceAbstraction took 1317.31 ms. Allocated memory is still 113.2 MB. Free memory was 75.1 MB in the beginning and 76.0 MB in the end (delta: -984.5 kB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:09,160 INFO L168 Benchmark]: Witness Printer took 90.90 ms. Allocated memory is still 113.2 MB. Free memory was 76.0 MB in the beginning and 73.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:09,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory was 93.7 MB in the beginning and 93.6 MB in the end (delta: 55.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.42 ms. Allocated memory is still 113.2 MB. Free memory was 77.3 MB in the beginning and 89.2 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.38 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.06 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 86.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 404.08 ms. Allocated memory is still 113.2 MB. Free memory was 86.4 MB in the beginning and 75.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1317.31 ms. Allocated memory is still 113.2 MB. Free memory was 75.1 MB in the beginning and 76.0 MB in the end (delta: -984.5 kB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. * Witness Printer took 90.90 ms. Allocated memory is still 113.2 MB. Free memory was 76.0 MB in the beginning and 73.5 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 - 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 *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i