./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/mod4.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_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/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_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invariants/mod4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/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_1df9832f-bfe2-4823-89e4-d3e312f3ec01/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 373d4d4747604d1981d4f1ca63ff09df143512c0 .................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:24:17,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:24:17,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:24:17,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:24:17,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:24:17,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:24:17,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:24:17,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:24:17,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:24:17,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:24:17,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:24:17,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:24:17,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:24:17,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:24:17,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:24:17,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:24:17,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:24:17,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:24:17,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:24:17,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:24:17,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:24:17,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:24:17,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:24:17,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:24:17,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:24:17,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:24:17,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:24:17,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:24:17,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:24:17,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:24:17,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:24:17,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:24:17,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:24:17,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:24:17,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:24:17,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:24:17,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:24:17,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:24:17,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:24:17,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:24:17,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:24:17,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:24:17,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:24:17,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:24:17,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:24:17,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:24:17,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:24:17,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:24:17,383 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:24:17,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:24:17,384 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:24:17,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:24:17,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:24:17,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:24:17,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:24:17,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:24:17,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:24:17,386 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:24:17,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:24:17,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:24:17,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:24:17,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:24:17,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:24:17,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:24:17,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:24:17,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:24:17,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:24:17,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:24:17,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:24:17,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:24:17,390 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:24:17,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:24:17,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:24:17,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:24:17,391 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_1df9832f-bfe2-4823-89e4-d3e312f3ec01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 373d4d4747604d1981d4f1ca63ff09df143512c0 [2021-10-15 19:24:17,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:24:17,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:24:17,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:24:17,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:24:17,703 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:24:17,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-invariants/mod4.c [2021-10-15 19:24:17,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/data/c1f3e416d/01847d4c98e141feb14e23260b46cd48/FLAG70acf3085 [2021-10-15 19:24:18,406 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:24:18,407 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/sv-benchmarks/c/loop-invariants/mod4.c [2021-10-15 19:24:18,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/data/c1f3e416d/01847d4c98e141feb14e23260b46cd48/FLAG70acf3085 [2021-10-15 19:24:18,762 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/data/c1f3e416d/01847d4c98e141feb14e23260b46cd48 [2021-10-15 19:24:18,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:24:18,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:24:18,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:24:18,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:24:18,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:24:18,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:24:18" (1/1) ... [2021-10-15 19:24:18,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4cd5bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:18, skipping insertion in model container [2021-10-15 19:24:18,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:24:18" (1/1) ... [2021-10-15 19:24:18,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:24:18,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:24:19,016 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_1df9832f-bfe2-4823-89e4-d3e312f3ec01/sv-benchmarks/c/loop-invariants/mod4.c[351,364] [2021-10-15 19:24:19,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:24:19,038 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:24:19,060 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_1df9832f-bfe2-4823-89e4-d3e312f3ec01/sv-benchmarks/c/loop-invariants/mod4.c[351,364] [2021-10-15 19:24:19,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:24:19,085 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:24:19,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19 WrapperNode [2021-10-15 19:24:19,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:24:19,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:24:19,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:24:19,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:24:19,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:24:19,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:24:19,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:24:19,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:24:19,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:24:19,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:24:19,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:24:19,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:24:19,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (1/1) ... [2021-10-15 19:24:19,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:24:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:24:19,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:24:19,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:24:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:24:19,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:24:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:24:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:24:19,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:24:19,511 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:24:19,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:24:19 BoogieIcfgContainer [2021-10-15 19:24:19,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:24:19,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:24:19,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:24:19,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:24:19,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:24:18" (1/3) ... [2021-10-15 19:24:19,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b90fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:24:19, skipping insertion in model container [2021-10-15 19:24:19,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:19" (2/3) ... [2021-10-15 19:24:19,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b90fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:24:19, skipping insertion in model container [2021-10-15 19:24:19,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:24:19" (3/3) ... [2021-10-15 19:24:19,537 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2021-10-15 19:24:19,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:24:19,547 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:24:19,608 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:24:19,617 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:24:19,618 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:24:19,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 19:24:19,654 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-10-15 19:24:19,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:24:19,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 14 events. 3/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:24:19,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 19:24:19,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 8 places, 9 transitions, 18 flow [2021-10-15 19:24:19,666 INFO L129 PetriNetUnfolder]: 2/8 cut-off events. [2021-10-15 19:24:19,666 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:24:19,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:24:19,667 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:24:19,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:24:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:24:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2021-10-15 19:24:19,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:24:19,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157749014] [2021-10-15 19:24:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:19,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:24:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:24:19,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:24:19,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157749014] [2021-10-15 19:24:19,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157749014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:24:19,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:24:19,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:24:19,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578786806] [2021-10-15 19:24:19,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:24:19,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:24:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:24:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:24:19,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 14 [2021-10-15 19:24:19,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 8 places, 9 transitions, 18 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:19,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:24:19,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 14 [2021-10-15 19:24:19,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:24:19,928 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-10-15 19:24:19,929 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:24:19,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10 conditions, 8 events. 1/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 8. Up to 2 conditions per place. [2021-10-15 19:24:19,943 INFO L132 encePairwiseOnDemand]: 13/14 looper letters, 0 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2021-10-15 19:24:19,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 9 places, 8 transitions, 16 flow [2021-10-15 19:24:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:24:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:24:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 25 transitions. [2021-10-15 19:24:19,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-10-15 19:24:19,973 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 25 transitions. [2021-10-15 19:24:19,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 25 transitions. [2021-10-15 19:24:19,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:24:19,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 25 transitions. [2021-10-15 19:24:19,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:19,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:19,992 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:19,995 INFO L186 Difference]: Start difference. First operand has 8 places, 9 transitions, 18 flow. Second operand 2 states and 25 transitions. [2021-10-15 19:24:19,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 9 places, 8 transitions, 16 flow [2021-10-15 19:24:20,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 9 places, 8 transitions, 16 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:24:20,014 INFO L242 Difference]: Finished difference. Result has 9 places, 8 transitions, 16 flow [2021-10-15 19:24:20,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=9, PETRI_TRANSITIONS=8} [2021-10-15 19:24:20,017 INFO L334 CegarLoopForPetriNet]: 8 programPoint places, 1 predicate places. [2021-10-15 19:24:20,018 INFO L470 AbstractCegarLoop]: Abstraction has has 9 places, 8 transitions, 16 flow [2021-10-15 19:24:20,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,019 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:24:20,019 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:24:20,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:24:20,020 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:24:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:24:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1806847180, now seen corresponding path program 1 times [2021-10-15 19:24:20,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:24:20,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467268197] [2021-10-15 19:24:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:20,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:24:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:24:20,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:24:20,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467268197] [2021-10-15 19:24:20,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467268197] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:24:20,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:24:20,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:24:20,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102091105] [2021-10-15 19:24:20,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:24:20,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:24:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:24:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:24:20,173 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 14 [2021-10-15 19:24:20,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 9 places, 8 transitions, 16 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:24:20,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 14 [2021-10-15 19:24:20,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:24:20,243 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-10-15 19:24:20,243 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:24:20,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 12 events. 1/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 18. Up to 5 conditions per place. [2021-10-15 19:24:20,244 INFO L132 encePairwiseOnDemand]: 10/14 looper letters, 3 selfloop transitions, 2 changer transitions 1/10 dead transitions. [2021-10-15 19:24:20,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 32 flow [2021-10-15 19:24:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:24:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:24:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 35 transitions. [2021-10-15 19:24:20,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.625 [2021-10-15 19:24:20,250 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 35 transitions. [2021-10-15 19:24:20,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 35 transitions. [2021-10-15 19:24:20,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:24:20,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 35 transitions. [2021-10-15 19:24:20,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,256 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,256 INFO L186 Difference]: Start difference. First operand has 9 places, 8 transitions, 16 flow. Second operand 4 states and 35 transitions. [2021-10-15 19:24:20,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 32 flow [2021-10-15 19:24:20,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 32 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:24:20,261 INFO L242 Difference]: Finished difference. Result has 14 places, 9 transitions, 30 flow [2021-10-15 19:24:20,264 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=30, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2021-10-15 19:24:20,265 INFO L334 CegarLoopForPetriNet]: 8 programPoint places, 6 predicate places. [2021-10-15 19:24:20,265 INFO L470 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 30 flow [2021-10-15 19:24:20,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,267 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:24:20,267 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:24:20,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:24:20,268 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:24:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:24:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1262026695, now seen corresponding path program 1 times [2021-10-15 19:24:20,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:24:20,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368284441] [2021-10-15 19:24:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:20,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:24:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:24:20,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:24:20,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368284441] [2021-10-15 19:24:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368284441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:24:20,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272023176] [2021-10-15 19:24:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:20,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:24:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:24:20,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:24:20,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:24:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:24:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:24:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:24:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272023176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:24:20,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:24:20,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-15 19:24:20,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458311571] [2021-10-15 19:24:20,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:24:20,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:24:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:24:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:24:20,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 14 [2021-10-15 19:24:20,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 30 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:24:20,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 14 [2021-10-15 19:24:20,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:24:20,854 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-10-15 19:24:20,856 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 19:24:20,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 13 events. 1/13 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/15 useless extension candidates. Maximal degree in co-relation 26. Up to 6 conditions per place. [2021-10-15 19:24:20,857 INFO L132 encePairwiseOnDemand]: 10/14 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-10-15 19:24:20,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 9 transitions, 44 flow [2021-10-15 19:24:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:24:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:24:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 57 transitions. [2021-10-15 19:24:20,862 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2021-10-15 19:24:20,862 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 57 transitions. [2021-10-15 19:24:20,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 57 transitions. [2021-10-15 19:24:20,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:24:20,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 57 transitions. [2021-10-15 19:24:20,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,870 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,870 INFO L186 Difference]: Start difference. First operand has 14 places, 9 transitions, 30 flow. Second operand 7 states and 57 transitions. [2021-10-15 19:24:20,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 9 transitions, 44 flow [2021-10-15 19:24:20,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 42 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:24:20,875 INFO L242 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2021-10-15 19:24:20,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2021-10-15 19:24:20,876 INFO L334 CegarLoopForPetriNet]: 8 programPoint places, 8 predicate places. [2021-10-15 19:24:20,876 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2021-10-15 19:24:20,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:20,880 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:24:20,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:24:21,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:24:21,099 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:24:21,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:24:21 BoogieIcfgContainer [2021-10-15 19:24:21,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:24:21,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:24:21,109 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:24:21,109 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:24:21,110 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:24:19" (3/4) ... [2021-10-15 19:24:21,113 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:24:21,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-15 19:24:21,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-15 19:24:21,127 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-15 19:24:21,127 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:24:21,128 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:24:21,197 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:24:21,197 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:24:21,199 INFO L168 Benchmark]: Toolchain (without parser) took 2431.08 ms. Allocated memory is still 100.7 MB. Free memory was 67.6 MB in the beginning and 56.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:24:21,200 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory was 38.1 MB in the beginning and 38.1 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:24:21,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.28 ms. Allocated memory is still 100.7 MB. Free memory was 67.4 MB in the beginning and 77.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:24:21,201 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.07 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:24:21,202 INFO L168 Benchmark]: Boogie Preprocessor took 26.31 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 74.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:24:21,203 INFO L168 Benchmark]: RCFGBuilder took 356.19 ms. Allocated memory is still 100.7 MB. Free memory was 74.5 MB in the beginning and 65.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:24:21,203 INFO L168 Benchmark]: TraceAbstraction took 1591.61 ms. Allocated memory is still 100.7 MB. Free memory was 65.1 MB in the beginning and 58.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:24:21,204 INFO L168 Benchmark]: Witness Printer took 88.69 ms. Allocated memory is still 100.7 MB. Free memory was 58.1 MB in the beginning and 56.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:24:21,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory was 38.1 MB in the beginning and 38.1 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.28 ms. Allocated memory is still 100.7 MB. Free memory was 67.4 MB in the beginning and 77.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.07 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.31 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 74.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 356.19 ms. Allocated memory is still 100.7 MB. Free memory was 74.5 MB in the beginning and 65.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1591.61 ms. Allocated memory is still 100.7 MB. Free memory was 65.1 MB in the beginning and 58.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Witness Printer took 88.69 ms. Allocated memory is still 100.7 MB. Free memory was 58.1 MB in the beginning and 56.0 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1497.1ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 318.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 4 SDslu, 3 SDs, 0 SdLazy, 18 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 149.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.1ms SsaConstructionTime, 145.1ms SatisfiabilityAnalysisTime, 493.9ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 SizeOfPredicates, 2 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:24:21,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df9832f-bfe2-4823-89e4-d3e312f3ec01/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...