./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer --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 409f93cc3fb27e0335e986593862ddeb482b815c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer --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 409f93cc3fb27e0335e986593862ddeb482b815c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-29 23:56:20,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:56:20,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:56:20,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:56:20,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:56:20,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:56:20,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:56:20,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:56:20,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:56:20,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:56:20,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:56:20,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:56:20,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:56:20,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:56:20,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:56:20,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:56:20,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:56:20,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:56:20,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:56:20,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:56:20,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:56:20,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:56:20,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:56:20,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:56:20,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:56:20,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:56:20,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:56:20,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:56:20,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:56:20,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:56:20,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:56:20,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:56:20,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:56:20,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:56:20,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:56:20,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:56:20,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:56:20,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:56:20,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:56:20,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:56:20,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:56:20,299 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:56:20,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:56:20,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:56:20,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:56:20,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:56:20,342 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:56:20,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:56:20,343 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:56:20,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:56:20,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:56:20,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:56:20,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:56:20,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:56:20,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:56:20,346 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:56:20,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:56:20,346 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:56:20,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:56:20,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:56:20,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:56:20,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:56:20,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:56:20,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:56:20,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:56:20,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:56:20,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:56:20,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:56:20,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:56:20,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:56:20,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:56:20,350 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-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 409f93cc3fb27e0335e986593862ddeb482b815c [2020-11-29 23:56:20,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:56:20,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:56:20,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:56:20,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:56:20,658 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:56:20,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2020-11-29 23:56:20,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/c0bd43eca/f845d821c86e451b9cfc695f8cec28dd/FLAG766e2065b [2020-11-29 23:56:21,361 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:56:21,362 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/sv-benchmarks/c/bitvector/byte_add-1.i [2020-11-29 23:56:21,377 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/c0bd43eca/f845d821c86e451b9cfc695f8cec28dd/FLAG766e2065b [2020-11-29 23:56:21,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/c0bd43eca/f845d821c86e451b9cfc695f8cec28dd [2020-11-29 23:56:21,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:56:21,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:56:21,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:56:21,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:56:21,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:56:21,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:56:21" (1/1) ... [2020-11-29 23:56:21,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3673247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:21, skipping insertion in model container [2020-11-29 23:56:21,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:56:21" (1/1) ... [2020-11-29 23:56:21,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:56:21,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:56:21,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:56:22,000 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:56:22,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:56:22,053 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:56:22,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22 WrapperNode [2020-11-29 23:56:22,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:56:22,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:56:22,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:56:22,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:56:22,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:56:22,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:56:22,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:56:22,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:56:22,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... [2020-11-29 23:56:22,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:56:22,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:56:22,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:56:22,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:56:22,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:56:22,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:56:22,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:56:22,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:56:22,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:56:22,753 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:56:22,757 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-29 23:56:22,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:56:22 BoogieIcfgContainer [2020-11-29 23:56:22,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:56:22,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:56:22,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:56:22,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:56:22,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:56:21" (1/3) ... [2020-11-29 23:56:22,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548bab3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:56:22, skipping insertion in model container [2020-11-29 23:56:22,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:56:22" (2/3) ... [2020-11-29 23:56:22,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548bab3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:56:22, skipping insertion in model container [2020-11-29 23:56:22,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:56:22" (3/3) ... [2020-11-29 23:56:22,770 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2020-11-29 23:56:22,782 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:56:22,786 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:56:22,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:56:22,828 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:56:22,828 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:56:22,829 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:56:22,829 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:56:22,829 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:56:22,829 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:56:22,829 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:56:22,829 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:56:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-11-29 23:56:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:56:22,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:22,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:22,849 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash 300651760, now seen corresponding path program 1 times [2020-11-29 23:56:22,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:22,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597468288] [2020-11-29 23:56:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:23,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597468288] [2020-11-29 23:56:23,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:23,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:56:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741423713] [2020-11-29 23:56:23,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:56:23,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:23,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:56:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:56:23,101 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2020-11-29 23:56:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:23,125 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2020-11-29 23:56:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:56:23,127 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-11-29 23:56:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:23,147 INFO L225 Difference]: With dead ends: 62 [2020-11-29 23:56:23,151 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 23:56:23,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:56:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 23:56:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 23:56:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 23:56:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-11-29 23:56:23,199 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 14 [2020-11-29 23:56:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:23,200 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-11-29 23:56:23,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:56:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-11-29 23:56:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:56:23,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:23,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:23,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:56:23,203 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:23,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2025375790, now seen corresponding path program 1 times [2020-11-29 23:56:23,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:23,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102804825] [2020-11-29 23:56:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:23,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102804825] [2020-11-29 23:56:23,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:23,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:56:23,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347012014] [2020-11-29 23:56:23,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:56:23,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:23,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:56:23,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:56:23,361 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 3 states. [2020-11-29 23:56:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:23,610 INFO L93 Difference]: Finished difference Result 93 states and 160 transitions. [2020-11-29 23:56:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:56:23,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-29 23:56:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:23,612 INFO L225 Difference]: With dead ends: 93 [2020-11-29 23:56:23,612 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 23:56:23,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:56:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 23:56:23,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-11-29 23:56:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 23:56:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 91 transitions. [2020-11-29 23:56:23,622 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 91 transitions. Word has length 14 [2020-11-29 23:56:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:23,622 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 91 transitions. [2020-11-29 23:56:23,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:56:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 91 transitions. [2020-11-29 23:56:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:56:23,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:23,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:23,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:56:23,624 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -331305593, now seen corresponding path program 1 times [2020-11-29 23:56:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:23,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163385476] [2020-11-29 23:56:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:56:23,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163385476] [2020-11-29 23:56:23,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:23,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:56:23,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536711119] [2020-11-29 23:56:23,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:56:23,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:56:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:56:23,796 INFO L87 Difference]: Start difference. First operand 61 states and 91 transitions. Second operand 4 states. [2020-11-29 23:56:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:24,109 INFO L93 Difference]: Finished difference Result 158 states and 237 transitions. [2020-11-29 23:56:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:56:24,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 23:56:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:24,112 INFO L225 Difference]: With dead ends: 158 [2020-11-29 23:56:24,112 INFO L226 Difference]: Without dead ends: 113 [2020-11-29 23:56:24,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:56:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-29 23:56:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 68. [2020-11-29 23:56:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 23:56:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 101 transitions. [2020-11-29 23:56:24,132 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 101 transitions. Word has length 20 [2020-11-29 23:56:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:24,133 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 101 transitions. [2020-11-29 23:56:24,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:56:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 101 transitions. [2020-11-29 23:56:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 23:56:24,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:24,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:24,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:56:24,137 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1354407497, now seen corresponding path program 1 times [2020-11-29 23:56:24,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:24,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767866291] [2020-11-29 23:56:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:56:24,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767866291] [2020-11-29 23:56:24,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:24,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:56:24,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608633927] [2020-11-29 23:56:24,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:56:24,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:24,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:56:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:56:24,299 INFO L87 Difference]: Start difference. First operand 68 states and 101 transitions. Second operand 4 states. [2020-11-29 23:56:24,412 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2020-11-29 23:56:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:24,687 INFO L93 Difference]: Finished difference Result 159 states and 237 transitions. [2020-11-29 23:56:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:56:24,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 23:56:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:24,689 INFO L225 Difference]: With dead ends: 159 [2020-11-29 23:56:24,691 INFO L226 Difference]: Without dead ends: 119 [2020-11-29 23:56:24,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:56:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-29 23:56:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2020-11-29 23:56:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 23:56:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2020-11-29 23:56:24,705 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 21 [2020-11-29 23:56:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:24,705 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2020-11-29 23:56:24,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:56:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2020-11-29 23:56:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 23:56:24,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:24,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:24,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 23:56:24,707 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash -554596010, now seen corresponding path program 1 times [2020-11-29 23:56:24,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:24,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580099186] [2020-11-29 23:56:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:24,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580099186] [2020-11-29 23:56:24,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403565940] [2020-11-29 23:56:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:24,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:56:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:25,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:25,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-11-29 23:56:25,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448068399] [2020-11-29 23:56:25,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:56:25,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:56:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:56:25,057 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand 4 states. [2020-11-29 23:56:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:25,347 INFO L93 Difference]: Finished difference Result 150 states and 241 transitions. [2020-11-29 23:56:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:56:25,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-29 23:56:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:25,350 INFO L225 Difference]: With dead ends: 150 [2020-11-29 23:56:25,350 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 23:56:25,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:56:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 23:56:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2020-11-29 23:56:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-29 23:56:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2020-11-29 23:56:25,373 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 22 [2020-11-29 23:56:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:25,374 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2020-11-29 23:56:25,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:56:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2020-11-29 23:56:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:56:25,376 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:25,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:25,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:25,594 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1635430727, now seen corresponding path program 1 times [2020-11-29 23:56:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:25,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038727824] [2020-11-29 23:56:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:25,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038727824] [2020-11-29 23:56:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717729277] [2020-11-29 23:56:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:56:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 23:56:25,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:25,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2020-11-29 23:56:25,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261467021] [2020-11-29 23:56:25,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:56:25,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:56:25,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:56:25,906 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand 4 states. [2020-11-29 23:56:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:26,249 INFO L93 Difference]: Finished difference Result 216 states and 317 transitions. [2020-11-29 23:56:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:56:26,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-29 23:56:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:26,252 INFO L225 Difference]: With dead ends: 216 [2020-11-29 23:56:26,252 INFO L226 Difference]: Without dead ends: 147 [2020-11-29 23:56:26,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:56:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-29 23:56:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2020-11-29 23:56:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-29 23:56:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 167 transitions. [2020-11-29 23:56:26,280 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 167 transitions. Word has length 28 [2020-11-29 23:56:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:26,280 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 167 transitions. [2020-11-29 23:56:26,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:56:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 167 transitions. [2020-11-29 23:56:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 23:56:26,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:26,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:26,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:26,483 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 977200060, now seen corresponding path program 1 times [2020-11-29 23:56:26,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:26,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262556537] [2020-11-29 23:56:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:56:26,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262556537] [2020-11-29 23:56:26,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896107801] [2020-11-29 23:56:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:26,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:56:26,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:26,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:26,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2020-11-29 23:56:26,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265649218] [2020-11-29 23:56:26,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:56:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:56:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:56:26,779 INFO L87 Difference]: Start difference. First operand 125 states and 167 transitions. Second operand 4 states. [2020-11-29 23:56:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:27,127 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2020-11-29 23:56:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:56:27,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-11-29 23:56:27,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:27,137 INFO L225 Difference]: With dead ends: 262 [2020-11-29 23:56:27,137 INFO L226 Difference]: Without dead ends: 170 [2020-11-29 23:56:27,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:56:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-29 23:56:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 148. [2020-11-29 23:56:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 23:56:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-11-29 23:56:27,161 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 34 [2020-11-29 23:56:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:27,161 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-11-29 23:56:27,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:56:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-11-29 23:56:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 23:56:27,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:27,169 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:27,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:27,386 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1423486637, now seen corresponding path program 1 times [2020-11-29 23:56:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768617531] [2020-11-29 23:56:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 23:56:27,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768617531] [2020-11-29 23:56:27,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:27,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:56:27,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942923036] [2020-11-29 23:56:27,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:56:27,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:27,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:56:27,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:56:27,505 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 5 states. [2020-11-29 23:56:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:27,976 INFO L93 Difference]: Finished difference Result 546 states and 704 transitions. [2020-11-29 23:56:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:56:27,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-11-29 23:56:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:27,980 INFO L225 Difference]: With dead ends: 546 [2020-11-29 23:56:27,980 INFO L226 Difference]: Without dead ends: 428 [2020-11-29 23:56:27,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:56:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-11-29 23:56:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 148. [2020-11-29 23:56:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 23:56:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-11-29 23:56:28,001 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 40 [2020-11-29 23:56:28,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:28,001 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-11-29 23:56:28,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:56:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-11-29 23:56:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 23:56:28,003 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:28,003 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:28,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 23:56:28,003 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1702021980, now seen corresponding path program 1 times [2020-11-29 23:56:28,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:28,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335998939] [2020-11-29 23:56:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 23:56:28,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335998939] [2020-11-29 23:56:28,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:28,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:56:28,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321949080] [2020-11-29 23:56:28,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:56:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:56:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:56:28,135 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 5 states. [2020-11-29 23:56:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:28,623 INFO L93 Difference]: Finished difference Result 526 states and 679 transitions. [2020-11-29 23:56:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:56:28,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-11-29 23:56:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:28,626 INFO L225 Difference]: With dead ends: 526 [2020-11-29 23:56:28,626 INFO L226 Difference]: Without dead ends: 409 [2020-11-29 23:56:28,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:56:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-11-29 23:56:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 148. [2020-11-29 23:56:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 23:56:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-11-29 23:56:28,637 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 41 [2020-11-29 23:56:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:28,638 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-11-29 23:56:28,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:56:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-11-29 23:56:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 23:56:28,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:28,640 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:28,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 23:56:28,640 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1267388014, now seen corresponding path program 1 times [2020-11-29 23:56:28,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:28,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156535760] [2020-11-29 23:56:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 23:56:28,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156535760] [2020-11-29 23:56:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 23:56:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872508308] [2020-11-29 23:56:28,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:56:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:56:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:56:28,780 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 6 states. [2020-11-29 23:56:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:29,448 INFO L93 Difference]: Finished difference Result 662 states and 851 transitions. [2020-11-29 23:56:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:56:29,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-11-29 23:56:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:29,452 INFO L225 Difference]: With dead ends: 662 [2020-11-29 23:56:29,453 INFO L226 Difference]: Without dead ends: 545 [2020-11-29 23:56:29,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:56:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-11-29 23:56:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 148. [2020-11-29 23:56:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 23:56:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-11-29 23:56:29,467 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 42 [2020-11-29 23:56:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:29,467 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-11-29 23:56:29,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:56:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-11-29 23:56:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 23:56:29,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:29,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:29,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 23:56:29,469 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 976595284, now seen corresponding path program 1 times [2020-11-29 23:56:29,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:29,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575848479] [2020-11-29 23:56:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 23:56:29,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575848479] [2020-11-29 23:56:29,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:29,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 23:56:29,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981415000] [2020-11-29 23:56:29,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:56:29,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:29,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:56:29,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:56:29,613 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 7 states. [2020-11-29 23:56:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:30,496 INFO L93 Difference]: Finished difference Result 703 states and 902 transitions. [2020-11-29 23:56:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:56:30,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-29 23:56:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:30,499 INFO L225 Difference]: With dead ends: 703 [2020-11-29 23:56:30,500 INFO L226 Difference]: Without dead ends: 585 [2020-11-29 23:56:30,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:56:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-11-29 23:56:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 136. [2020-11-29 23:56:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 23:56:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2020-11-29 23:56:30,510 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 42 [2020-11-29 23:56:30,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:30,511 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2020-11-29 23:56:30,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:56:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2020-11-29 23:56:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 23:56:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:30,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:30,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 23:56:30,512 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1650903097, now seen corresponding path program 1 times [2020-11-29 23:56:30,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:30,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277628907] [2020-11-29 23:56:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-29 23:56:30,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277628907] [2020-11-29 23:56:30,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:30,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:56:30,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657967918] [2020-11-29 23:56:30,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:56:30,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:56:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:56:30,558 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand 3 states. [2020-11-29 23:56:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:30,592 INFO L93 Difference]: Finished difference Result 198 states and 250 transitions. [2020-11-29 23:56:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:56:30,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-11-29 23:56:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:30,594 INFO L225 Difference]: With dead ends: 198 [2020-11-29 23:56:30,595 INFO L226 Difference]: Without dead ends: 164 [2020-11-29 23:56:30,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:56:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-11-29 23:56:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-11-29 23:56:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-29 23:56:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2020-11-29 23:56:30,604 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 47 [2020-11-29 23:56:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:30,605 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2020-11-29 23:56:30,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:56:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2020-11-29 23:56:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 23:56:30,607 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:30,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:30,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 23:56:30,608 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1925662711, now seen corresponding path program 1 times [2020-11-29 23:56:30,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:30,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967351470] [2020-11-29 23:56:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:30,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967351470] [2020-11-29 23:56:30,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525732449] [2020-11-29 23:56:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:30,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:56:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 23:56:30,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:30,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-11-29 23:56:30,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997079778] [2020-11-29 23:56:30,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:56:30,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:56:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:56:30,869 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand 5 states. [2020-11-29 23:56:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:31,129 INFO L93 Difference]: Finished difference Result 659 states and 849 transitions. [2020-11-29 23:56:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:56:31,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-11-29 23:56:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:31,132 INFO L225 Difference]: With dead ends: 659 [2020-11-29 23:56:31,132 INFO L226 Difference]: Without dead ends: 450 [2020-11-29 23:56:31,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:56:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-11-29 23:56:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 391. [2020-11-29 23:56:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-11-29 23:56:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 493 transitions. [2020-11-29 23:56:31,154 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 493 transitions. Word has length 47 [2020-11-29 23:56:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:31,155 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 493 transitions. [2020-11-29 23:56:31,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:56:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 493 transitions. [2020-11-29 23:56:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 23:56:31,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:31,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:31,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:31,366 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2147413493, now seen corresponding path program 1 times [2020-11-29 23:56:31,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:31,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022707958] [2020-11-29 23:56:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:31,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022707958] [2020-11-29 23:56:31,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308888352] [2020-11-29 23:56:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:31,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 23:56:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-29 23:56:31,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:31,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 14 [2020-11-29 23:56:31,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725493444] [2020-11-29 23:56:31,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:56:31,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:31,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:56:31,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:56:31,933 INFO L87 Difference]: Start difference. First operand 391 states and 493 transitions. Second operand 10 states. [2020-11-29 23:56:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:32,827 INFO L93 Difference]: Finished difference Result 1153 states and 1456 transitions. [2020-11-29 23:56:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:56:32,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-11-29 23:56:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:32,833 INFO L225 Difference]: With dead ends: 1153 [2020-11-29 23:56:32,834 INFO L226 Difference]: Without dead ends: 1003 [2020-11-29 23:56:32,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:56:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-11-29 23:56:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 492. [2020-11-29 23:56:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-11-29 23:56:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 627 transitions. [2020-11-29 23:56:32,862 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 627 transitions. Word has length 48 [2020-11-29 23:56:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:32,863 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 627 transitions. [2020-11-29 23:56:32,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:56:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 627 transitions. [2020-11-29 23:56:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 23:56:32,864 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:32,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:33,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 23:56:33,078 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:33,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1835371756, now seen corresponding path program 1 times [2020-11-29 23:56:33,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:33,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602606785] [2020-11-29 23:56:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-29 23:56:33,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602606785] [2020-11-29 23:56:33,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:56:33,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 23:56:33,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291092547] [2020-11-29 23:56:33,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:56:33,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:33,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:56:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:56:33,222 INFO L87 Difference]: Start difference. First operand 492 states and 627 transitions. Second operand 7 states. [2020-11-29 23:56:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:33,989 INFO L93 Difference]: Finished difference Result 1533 states and 1921 transitions. [2020-11-29 23:56:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:56:33,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-11-29 23:56:33,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:33,996 INFO L225 Difference]: With dead ends: 1533 [2020-11-29 23:56:33,996 INFO L226 Difference]: Without dead ends: 1284 [2020-11-29 23:56:33,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:56:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-11-29 23:56:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 484. [2020-11-29 23:56:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-11-29 23:56:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 619 transitions. [2020-11-29 23:56:34,026 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 619 transitions. Word has length 49 [2020-11-29 23:56:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:34,027 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 619 transitions. [2020-11-29 23:56:34,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:56:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 619 transitions. [2020-11-29 23:56:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 23:56:34,028 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:34,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:34,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 23:56:34,028 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1114778412, now seen corresponding path program 1 times [2020-11-29 23:56:34,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:34,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229599470] [2020-11-29 23:56:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229599470] [2020-11-29 23:56:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439133320] [2020-11-29 23:56:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:34,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 23:56:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:34,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:56:34,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2020-11-29 23:56:34,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153214893] [2020-11-29 23:56:34,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:56:34,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:34,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:56:34,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:56:34,254 INFO L87 Difference]: Start difference. First operand 484 states and 619 transitions. Second operand 10 states. [2020-11-29 23:56:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:35,233 INFO L93 Difference]: Finished difference Result 1447 states and 1845 transitions. [2020-11-29 23:56:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 23:56:35,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-11-29 23:56:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:35,240 INFO L225 Difference]: With dead ends: 1447 [2020-11-29 23:56:35,240 INFO L226 Difference]: Without dead ends: 1128 [2020-11-29 23:56:35,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-29 23:56:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-11-29 23:56:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 817. [2020-11-29 23:56:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-11-29 23:56:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1043 transitions. [2020-11-29 23:56:35,281 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1043 transitions. Word has length 50 [2020-11-29 23:56:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:35,281 INFO L481 AbstractCegarLoop]: Abstraction has 817 states and 1043 transitions. [2020-11-29 23:56:35,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:56:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1043 transitions. [2020-11-29 23:56:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 23:56:35,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:35,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:35,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:35,498 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1385725721, now seen corresponding path program 1 times [2020-11-29 23:56:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:35,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877115161] [2020-11-29 23:56:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:35,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877115161] [2020-11-29 23:56:35,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888017166] [2020-11-29 23:56:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:56:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 23:56:35,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:35,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2020-11-29 23:56:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938494806] [2020-11-29 23:56:35,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:56:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:56:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:56:35,736 INFO L87 Difference]: Start difference. First operand 817 states and 1043 transitions. Second operand 5 states. [2020-11-29 23:56:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:36,089 INFO L93 Difference]: Finished difference Result 1931 states and 2506 transitions. [2020-11-29 23:56:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:56:36,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-11-29 23:56:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:36,096 INFO L225 Difference]: With dead ends: 1931 [2020-11-29 23:56:36,096 INFO L226 Difference]: Without dead ends: 1137 [2020-11-29 23:56:36,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:56:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2020-11-29 23:56:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 976. [2020-11-29 23:56:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-11-29 23:56:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1230 transitions. [2020-11-29 23:56:36,145 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1230 transitions. Word has length 51 [2020-11-29 23:56:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:36,146 INFO L481 AbstractCegarLoop]: Abstraction has 976 states and 1230 transitions. [2020-11-29 23:56:36,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:56:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1230 transitions. [2020-11-29 23:56:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 23:56:36,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:36,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:36,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 23:56:36,374 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1183083152, now seen corresponding path program 1 times [2020-11-29 23:56:36,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:36,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205930798] [2020-11-29 23:56:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:36,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205930798] [2020-11-29 23:56:36,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124252000] [2020-11-29 23:56:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 23:56:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 23:56:36,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:36,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 14 [2020-11-29 23:56:36,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012493466] [2020-11-29 23:56:36,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:56:36,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:56:36,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:56:36,720 INFO L87 Difference]: Start difference. First operand 976 states and 1230 transitions. Second operand 10 states. [2020-11-29 23:56:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:37,588 INFO L93 Difference]: Finished difference Result 1764 states and 2212 transitions. [2020-11-29 23:56:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 23:56:37,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-11-29 23:56:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:37,599 INFO L225 Difference]: With dead ends: 1764 [2020-11-29 23:56:37,599 INFO L226 Difference]: Without dead ends: 1587 [2020-11-29 23:56:37,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-29 23:56:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2020-11-29 23:56:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1071. [2020-11-29 23:56:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2020-11-29 23:56:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1350 transitions. [2020-11-29 23:56:37,650 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1350 transitions. Word has length 52 [2020-11-29 23:56:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:37,651 INFO L481 AbstractCegarLoop]: Abstraction has 1071 states and 1350 transitions. [2020-11-29 23:56:37,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:56:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1350 transitions. [2020-11-29 23:56:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 23:56:37,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:37,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:37,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 23:56:37,879 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:37,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1172722098, now seen corresponding path program 1 times [2020-11-29 23:56:37,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:37,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378441353] [2020-11-29 23:56:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:37,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378441353] [2020-11-29 23:56:37,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101214730] [2020-11-29 23:56:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:38,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:56:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 23:56:38,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:56:38,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-11-29 23:56:38,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671063895] [2020-11-29 23:56:38,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:56:38,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:56:38,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:56:38,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:56:38,173 INFO L87 Difference]: Start difference. First operand 1071 states and 1350 transitions. Second operand 6 states. [2020-11-29 23:56:38,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:56:38,579 INFO L93 Difference]: Finished difference Result 1856 states and 2344 transitions. [2020-11-29 23:56:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:56:38,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-11-29 23:56:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:56:38,588 INFO L225 Difference]: With dead ends: 1856 [2020-11-29 23:56:38,589 INFO L226 Difference]: Without dead ends: 1574 [2020-11-29 23:56:38,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:56:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2020-11-29 23:56:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1334. [2020-11-29 23:56:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1334 states. [2020-11-29 23:56:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1688 transitions. [2020-11-29 23:56:38,673 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1688 transitions. Word has length 52 [2020-11-29 23:56:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:56:38,673 INFO L481 AbstractCegarLoop]: Abstraction has 1334 states and 1688 transitions. [2020-11-29 23:56:38,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:56:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1688 transitions. [2020-11-29 23:56:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-29 23:56:38,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:56:38,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:56:38,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:38,894 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:56:38,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:56:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash -869356318, now seen corresponding path program 1 times [2020-11-29 23:56:38,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:56:38,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152457278] [2020-11-29 23:56:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:56:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:56:39,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152457278] [2020-11-29 23:56:39,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137281253] [2020-11-29 23:56:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:56:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:56:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 23:56:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:56:39,207 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-29 23:56:40,074 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-11-29 23:57:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 23:57:48,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:57:48,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2020-11-29 23:57:48,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063684622] [2020-11-29 23:57:48,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:57:48,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:57:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:57:48,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2020-11-29 23:57:48,186 INFO L87 Difference]: Start difference. First operand 1334 states and 1688 transitions. Second operand 7 states. [2020-11-29 23:57:51,813 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-29 23:58:15,552 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-11-29 23:58:15,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:58:15,754 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:137) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:759) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 31 more [2020-11-29 23:58:15,759 INFO L168 Benchmark]: Toolchain (without parser) took 114059.46 ms. Allocated memory was 83.9 MB in the beginning and 272.6 MB in the end (delta: 188.7 MB). Free memory was 53.6 MB in the beginning and 225.9 MB in the end (delta: -172.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:15,760 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 83.9 MB. Free memory was 41.3 MB in the beginning and 41.3 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:15,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.79 ms. Allocated memory was 83.9 MB in the beginning and 107.0 MB in the end (delta: 23.1 MB). Free memory was 53.6 MB in the beginning and 81.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:15,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.97 ms. Allocated memory is still 107.0 MB. Free memory was 81.8 MB in the beginning and 80.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:15,761 INFO L168 Benchmark]: Boogie Preprocessor took 37.61 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:15,762 INFO L168 Benchmark]: RCFGBuilder took 613.08 ms. Allocated memory is still 107.0 MB. Free memory was 79.0 MB in the beginning and 58.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:15,762 INFO L168 Benchmark]: TraceAbstraction took 112995.97 ms. Allocated memory was 107.0 MB in the beginning and 272.6 MB in the end (delta: 165.7 MB). Free memory was 57.8 MB in the beginning and 225.9 MB in the end (delta: -168.1 MB). Peak memory consumption was 529.7 kB. Max. memory is 16.1 GB. [2020-11-29 23:58:15,765 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 83.9 MB. Free memory was 41.3 MB in the beginning and 41.3 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.79 ms. Allocated memory was 83.9 MB in the beginning and 107.0 MB in the end (delta: 23.1 MB). Free memory was 53.6 MB in the beginning and 81.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.97 ms. Allocated memory is still 107.0 MB. Free memory was 81.8 MB in the beginning and 80.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.61 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 613.08 ms. Allocated memory is still 107.0 MB. Free memory was 79.0 MB in the beginning and 58.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 112995.97 ms. Allocated memory was 107.0 MB in the beginning and 272.6 MB in the end (delta: 165.7 MB). Free memory was 57.8 MB in the beginning and 225.9 MB in the end (delta: -168.1 MB). Peak memory consumption was 529.7 kB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:58:18,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:58:18,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:58:18,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:58:18,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:58:18,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:58:18,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:58:18,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:58:18,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:58:18,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:58:18,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:58:18,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:58:18,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:58:18,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:58:18,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:58:18,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:58:18,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:58:18,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:58:18,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:58:18,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:58:18,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:58:18,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:58:18,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:58:18,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:58:18,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:58:18,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:58:18,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:58:18,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:58:18,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:58:18,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:58:18,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:58:18,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:58:18,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:58:18,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:58:18,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:58:18,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:58:18,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:58:18,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:58:18,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:58:18,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:58:18,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:58:18,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 23:58:18,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:58:18,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:58:18,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:58:18,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:58:18,556 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:58:18,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:58:18,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:58:18,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:58:18,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:58:18,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:58:18,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:58:18,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:58:18,560 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 23:58:18,560 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 23:58:18,560 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:58:18,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:58:18,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:58:18,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:58:18,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:58:18,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:58:18,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:58:18,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:58:18,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:58:18,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:58:18,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:58:18,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:58:18,564 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 23:58:18,564 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 23:58:18,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:58:18,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:58:18,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 23:58:18,565 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 409f93cc3fb27e0335e986593862ddeb482b815c [2020-11-29 23:58:19,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:58:19,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:58:19,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:58:19,071 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:58:19,072 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:58:19,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2020-11-29 23:58:19,161 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/609673558/f6b7ab3d3760404bbacdf3d739de9b36/FLAG7d14f5ad5 [2020-11-29 23:58:19,797 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:58:19,798 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/sv-benchmarks/c/bitvector/byte_add-1.i [2020-11-29 23:58:19,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/609673558/f6b7ab3d3760404bbacdf3d739de9b36/FLAG7d14f5ad5 [2020-11-29 23:58:20,158 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/data/609673558/f6b7ab3d3760404bbacdf3d739de9b36 [2020-11-29 23:58:20,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:58:20,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:58:20,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:58:20,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:58:20,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:58:20,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dcffb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20, skipping insertion in model container [2020-11-29 23:58:20,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:58:20,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:58:20,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:58:20,635 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:58:20,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:58:20,753 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:58:20,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20 WrapperNode [2020-11-29 23:58:20,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:58:20,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:58:20,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:58:20,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:58:20,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:58:20,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:58:20,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:58:20,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:58:20,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... [2020-11-29 23:58:20,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:58:20,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:58:20,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:58:20,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:58:20,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:58:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 23:58:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:58:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:58:21,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:58:21,666 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:58:21,666 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-29 23:58:21,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:21 BoogieIcfgContainer [2020-11-29 23:58:21,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:58:21,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:58:21,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:58:21,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:58:21,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:58:20" (1/3) ... [2020-11-29 23:58:21,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef881e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:58:21, skipping insertion in model container [2020-11-29 23:58:21,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:20" (2/3) ... [2020-11-29 23:58:21,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef881e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:58:21, skipping insertion in model container [2020-11-29 23:58:21,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:21" (3/3) ... [2020-11-29 23:58:21,682 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2020-11-29 23:58:21,697 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:58:21,703 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:58:21,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:58:21,745 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:58:21,745 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:58:21,746 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:58:21,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:58:21,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:58:21,746 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:58:21,746 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:58:21,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:58:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-11-29 23:58:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:58:21,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:21,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:21,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash 300651760, now seen corresponding path program 1 times [2020-11-29 23:58:21,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:21,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715001241] [2020-11-29 23:58:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:21,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 23:58:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:21,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:21,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715001241] [2020-11-29 23:58:21,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:21,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 23:58:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059657471] [2020-11-29 23:58:21,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:58:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:21,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:58:21,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:58:21,986 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2020-11-29 23:58:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:22,009 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2020-11-29 23:58:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:58:22,010 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-11-29 23:58:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:22,029 INFO L225 Difference]: With dead ends: 62 [2020-11-29 23:58:22,032 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 23:58:22,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:58:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 23:58:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 23:58:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 23:58:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-11-29 23:58:22,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 14 [2020-11-29 23:58:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-11-29 23:58:22,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:58:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-11-29 23:58:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:58:22,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:22,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:22,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 23:58:22,321 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2025375790, now seen corresponding path program 1 times [2020-11-29 23:58:22,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:22,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551290242] [2020-11-29 23:58:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:58:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:22,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:22,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551290242] [2020-11-29 23:58:22,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:22,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 23:58:22,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532128029] [2020-11-29 23:58:22,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:58:22,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:22,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:58:22,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:58:22,607 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-11-29 23:58:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:23,379 INFO L93 Difference]: Finished difference Result 188 states and 323 transitions. [2020-11-29 23:58:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:58:23,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-29 23:58:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:23,383 INFO L225 Difference]: With dead ends: 188 [2020-11-29 23:58:23,383 INFO L226 Difference]: Without dead ends: 158 [2020-11-29 23:58:23,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:58:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-29 23:58:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 99. [2020-11-29 23:58:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 23:58:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 154 transitions. [2020-11-29 23:58:23,423 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 154 transitions. Word has length 14 [2020-11-29 23:58:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:23,423 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 154 transitions. [2020-11-29 23:58:23,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:58:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 154 transitions. [2020-11-29 23:58:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 23:58:23,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:23,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:23,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 23:58:23,641 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash -190419907, now seen corresponding path program 1 times [2020-11-29 23:58:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115444549] [2020-11-29 23:58:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:23,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:58:23,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:23,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:24,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115444549] [2020-11-29 23:58:24,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:24,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2020-11-29 23:58:24,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226465724] [2020-11-29 23:58:24,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 23:58:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 23:58:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:58:24,056 INFO L87 Difference]: Start difference. First operand 99 states and 154 transitions. Second operand 12 states. [2020-11-29 23:58:25,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:25,528 INFO L93 Difference]: Finished difference Result 261 states and 431 transitions. [2020-11-29 23:58:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:58:25,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 23:58:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:25,532 INFO L225 Difference]: With dead ends: 261 [2020-11-29 23:58:25,533 INFO L226 Difference]: Without dead ends: 231 [2020-11-29 23:58:25,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-11-29 23:58:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-11-29 23:58:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2020-11-29 23:58:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-29 23:58:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 305 transitions. [2020-11-29 23:58:25,588 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 305 transitions. Word has length 16 [2020-11-29 23:58:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:25,588 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 305 transitions. [2020-11-29 23:58:25,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 23:58:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 305 transitions. [2020-11-29 23:58:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:58:25,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:25,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:25,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 23:58:25,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash 710533515, now seen corresponding path program 1 times [2020-11-29 23:58:25,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:25,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643339126] [2020-11-29 23:58:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:25,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:58:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:25,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:25,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643339126] [2020-11-29 23:58:25,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:25,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 23:58:25,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099023022] [2020-11-29 23:58:25,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:58:25,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:58:25,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:58:25,952 INFO L87 Difference]: Start difference. First operand 193 states and 305 transitions. Second operand 4 states. [2020-11-29 23:58:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:26,235 INFO L93 Difference]: Finished difference Result 453 states and 726 transitions. [2020-11-29 23:58:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:58:26,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-29 23:58:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:26,239 INFO L225 Difference]: With dead ends: 453 [2020-11-29 23:58:26,240 INFO L226 Difference]: Without dead ends: 294 [2020-11-29 23:58:26,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:58:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-11-29 23:58:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 259. [2020-11-29 23:58:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-11-29 23:58:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 399 transitions. [2020-11-29 23:58:26,273 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 399 transitions. Word has length 28 [2020-11-29 23:58:26,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:26,273 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 399 transitions. [2020-11-29 23:58:26,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:58:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 399 transitions. [2020-11-29 23:58:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:58:26,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:26,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:26,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 23:58:26,500 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1912729077, now seen corresponding path program 1 times [2020-11-29 23:58:26,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:26,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77475896] [2020-11-29 23:58:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:58:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:26,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:26,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77475896] [2020-11-29 23:58:26,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:26,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 23:58:26,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066055829] [2020-11-29 23:58:26,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:58:26,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:26,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:58:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:58:26,657 INFO L87 Difference]: Start difference. First operand 259 states and 399 transitions. Second operand 6 states. [2020-11-29 23:58:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:27,154 INFO L93 Difference]: Finished difference Result 1013 states and 1566 transitions. [2020-11-29 23:58:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:58:27,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-29 23:58:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:27,161 INFO L225 Difference]: With dead ends: 1013 [2020-11-29 23:58:27,161 INFO L226 Difference]: Without dead ends: 790 [2020-11-29 23:58:27,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:58:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-11-29 23:58:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 638. [2020-11-29 23:58:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-11-29 23:58:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 966 transitions. [2020-11-29 23:58:27,197 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 966 transitions. Word has length 28 [2020-11-29 23:58:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:27,198 INFO L481 AbstractCegarLoop]: Abstraction has 638 states and 966 transitions. [2020-11-29 23:58:27,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:58:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 966 transitions. [2020-11-29 23:58:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 23:58:27,201 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:27,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:27,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 23:58:27,424 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash 213002722, now seen corresponding path program 1 times [2020-11-29 23:58:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:27,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195133015] [2020-11-29 23:58:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:27,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:58:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:27,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:27,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195133015] [2020-11-29 23:58:27,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:27,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-11-29 23:58:27,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292065874] [2020-11-29 23:58:27,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:58:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:58:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:58:27,756 INFO L87 Difference]: Start difference. First operand 638 states and 966 transitions. Second operand 10 states. [2020-11-29 23:58:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:29,599 INFO L93 Difference]: Finished difference Result 2031 states and 3088 transitions. [2020-11-29 23:58:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 23:58:29,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-11-29 23:58:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:29,612 INFO L225 Difference]: With dead ends: 2031 [2020-11-29 23:58:29,612 INFO L226 Difference]: Without dead ends: 1443 [2020-11-29 23:58:29,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-29 23:58:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2020-11-29 23:58:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 853. [2020-11-29 23:58:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2020-11-29 23:58:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1225 transitions. [2020-11-29 23:58:29,680 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1225 transitions. Word has length 30 [2020-11-29 23:58:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:29,681 INFO L481 AbstractCegarLoop]: Abstraction has 853 states and 1225 transitions. [2020-11-29 23:58:29,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:58:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1225 transitions. [2020-11-29 23:58:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 23:58:29,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:29,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:29,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 23:58:29,902 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:29,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1536475858, now seen corresponding path program 1 times [2020-11-29 23:58:29,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:29,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495577293] [2020-11-29 23:58:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:29,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:58:29,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:30,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:30,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495577293] [2020-11-29 23:58:30,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:58:30,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-11-29 23:58:30,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019747985] [2020-11-29 23:58:30,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:58:30,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:58:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:58:30,093 INFO L87 Difference]: Start difference. First operand 853 states and 1225 transitions. Second operand 10 states. [2020-11-29 23:58:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:31,522 INFO L93 Difference]: Finished difference Result 1850 states and 2667 transitions. [2020-11-29 23:58:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 23:58:31,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-11-29 23:58:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:31,531 INFO L225 Difference]: With dead ends: 1850 [2020-11-29 23:58:31,531 INFO L226 Difference]: Without dead ends: 1159 [2020-11-29 23:58:31,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2020-11-29 23:58:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-11-29 23:58:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 982. [2020-11-29 23:58:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-11-29 23:58:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1352 transitions. [2020-11-29 23:58:31,584 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1352 transitions. Word has length 33 [2020-11-29 23:58:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:31,585 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 1352 transitions. [2020-11-29 23:58:31,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:58:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1352 transitions. [2020-11-29 23:58:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 23:58:31,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:31,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:31,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 23:58:31,808 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1424553147, now seen corresponding path program 1 times [2020-11-29 23:58:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:31,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744077359] [2020-11-29 23:58:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:58:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:31,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:32,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744077359] [2020-11-29 23:58:32,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:58:32,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-29 23:58:32,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901946355] [2020-11-29 23:58:32,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 23:58:32,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:32,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 23:58:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:58:32,058 INFO L87 Difference]: Start difference. First operand 982 states and 1352 transitions. Second operand 11 states. [2020-11-29 23:58:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:33,834 INFO L93 Difference]: Finished difference Result 3790 states and 5326 transitions. [2020-11-29 23:58:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 23:58:33,835 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-11-29 23:58:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:33,850 INFO L225 Difference]: With dead ends: 3790 [2020-11-29 23:58:33,850 INFO L226 Difference]: Without dead ends: 2753 [2020-11-29 23:58:33,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-11-29 23:58:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2020-11-29 23:58:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1989. [2020-11-29 23:58:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2020-11-29 23:58:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2767 transitions. [2020-11-29 23:58:33,933 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2767 transitions. Word has length 34 [2020-11-29 23:58:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:33,933 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 2767 transitions. [2020-11-29 23:58:33,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 23:58:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2767 transitions. [2020-11-29 23:58:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 23:58:33,936 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:33,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:34,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 23:58:34,161 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1676502539, now seen corresponding path program 1 times [2020-11-29 23:58:34,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:34,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385627963] [2020-11-29 23:58:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:58:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:34,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385627963] [2020-11-29 23:58:34,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:34,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 23:58:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447272990] [2020-11-29 23:58:34,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:58:34,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:58:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:58:34,258 INFO L87 Difference]: Start difference. First operand 1989 states and 2767 transitions. Second operand 4 states. [2020-11-29 23:58:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:34,349 INFO L93 Difference]: Finished difference Result 2856 states and 3892 transitions. [2020-11-29 23:58:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:34,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-11-29 23:58:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:34,393 INFO L225 Difference]: With dead ends: 2856 [2020-11-29 23:58:34,394 INFO L226 Difference]: Without dead ends: 2738 [2020-11-29 23:58:34,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:58:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2020-11-29 23:58:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2384. [2020-11-29 23:58:34,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2384 states. [2020-11-29 23:58:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 3303 transitions. [2020-11-29 23:58:34,507 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 3303 transitions. Word has length 35 [2020-11-29 23:58:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:34,508 INFO L481 AbstractCegarLoop]: Abstraction has 2384 states and 3303 transitions. [2020-11-29 23:58:34,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:58:34,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 3303 transitions. [2020-11-29 23:58:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 23:58:34,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:34,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:34,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-11-29 23:58:34,730 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash 665385289, now seen corresponding path program 1 times [2020-11-29 23:58:34,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:34,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156262236] [2020-11-29 23:58:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:34,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:58:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:34,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:34,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156262236] [2020-11-29 23:58:34,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:34,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 23:58:34,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980489096] [2020-11-29 23:58:34,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:58:34,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:34,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:58:34,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:58:34,893 INFO L87 Difference]: Start difference. First operand 2384 states and 3303 transitions. Second operand 6 states. [2020-11-29 23:58:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:35,509 INFO L93 Difference]: Finished difference Result 5459 states and 7802 transitions. [2020-11-29 23:58:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:58:35,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-11-29 23:58:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:35,535 INFO L225 Difference]: With dead ends: 5459 [2020-11-29 23:58:35,536 INFO L226 Difference]: Without dead ends: 3808 [2020-11-29 23:58:35,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:58:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2020-11-29 23:58:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3226. [2020-11-29 23:58:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3226 states. [2020-11-29 23:58:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 4484 transitions. [2020-11-29 23:58:35,699 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 4484 transitions. Word has length 35 [2020-11-29 23:58:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:35,702 INFO L481 AbstractCegarLoop]: Abstraction has 3226 states and 4484 transitions. [2020-11-29 23:58:35,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:58:35,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 4484 transitions. [2020-11-29 23:58:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-29 23:58:35,706 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:35,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:35,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-11-29 23:58:35,925 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1762842656, now seen corresponding path program 1 times [2020-11-29 23:58:35,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:35,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459833500] [2020-11-29 23:58:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:35,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 23:58:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:37,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 23:58:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 23:58:37,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 23:58:39,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459833500] [2020-11-29 23:58:39,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:58:39,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2020-11-29 23:58:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061828148] [2020-11-29 23:58:39,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 23:58:39,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:39,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 23:58:39,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 23:58:39,687 INFO L87 Difference]: Start difference. First operand 3226 states and 4484 transitions. Second operand 38 states. [2020-11-29 23:58:45,077 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-11-29 23:58:45,595 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-29 23:58:46,418 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-29 23:58:47,187 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-11-29 23:58:48,798 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-11-29 23:58:49,875 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-11-29 23:58:50,438 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-11-29 23:58:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:52,896 INFO L93 Difference]: Finished difference Result 5162 states and 7104 transitions. [2020-11-29 23:58:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-29 23:58:52,897 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 53 [2020-11-29 23:58:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:52,931 INFO L225 Difference]: With dead ends: 5162 [2020-11-29 23:58:52,932 INFO L226 Difference]: Without dead ends: 4844 [2020-11-29 23:58:52,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2020-11-29 23:58:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2020-11-29 23:58:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 3794. [2020-11-29 23:58:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3794 states. [2020-11-29 23:58:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 5270 transitions. [2020-11-29 23:58:53,208 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 5270 transitions. Word has length 53 [2020-11-29 23:58:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:53,208 INFO L481 AbstractCegarLoop]: Abstraction has 3794 states and 5270 transitions. [2020-11-29 23:58:53,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 23:58:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 5270 transitions. [2020-11-29 23:58:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-29 23:58:53,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:53,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:53,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-11-29 23:58:53,437 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1511056286, now seen corresponding path program 1 times [2020-11-29 23:58:53,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:53,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455744003] [2020-11-29 23:58:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:53,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:58:53,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:58:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 23:58:53,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 23:58:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 23:58:53,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455744003] [2020-11-29 23:58:53,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:58:53,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-29 23:58:53,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432383805] [2020-11-29 23:58:53,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:58:53,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 23:58:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:58:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:58:53,630 INFO L87 Difference]: Start difference. First operand 3794 states and 5270 transitions. Second operand 7 states. [2020-11-29 23:58:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:54,111 INFO L93 Difference]: Finished difference Result 7641 states and 10585 transitions. [2020-11-29 23:58:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:58:54,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-11-29 23:58:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:54,141 INFO L225 Difference]: With dead ends: 7641 [2020-11-29 23:58:54,142 INFO L226 Difference]: Without dead ends: 3890 [2020-11-29 23:58:54,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:58:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2020-11-29 23:58:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3605. [2020-11-29 23:58:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3605 states. [2020-11-29 23:58:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 4852 transitions. [2020-11-29 23:58:54,365 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 4852 transitions. Word has length 53 [2020-11-29 23:58:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:54,366 INFO L481 AbstractCegarLoop]: Abstraction has 3605 states and 4852 transitions. [2020-11-29 23:58:54,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:58:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 4852 transitions. [2020-11-29 23:58:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 23:58:54,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:54,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:54,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-11-29 23:58:54,586 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2036158384, now seen corresponding path program 1 times [2020-11-29 23:58:54,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 23:58:54,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158089263] [2020-11-29 23:58:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-11-29 23:58:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:54,669 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:54,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:54,835 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 23:58:54,835 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:58:55,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-11-29 23:58:55,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:58:55 BoogieIcfgContainer [2020-11-29 23:58:55,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:58:55,143 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:58:55,143 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:58:55,143 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:58:55,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:21" (3/4) ... [2020-11-29 23:58:55,147 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:58:55,265 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4e338b18-de1e-4610-8067-97271a46003e/bin/uautomizer/witness.graphml [2020-11-29 23:58:55,265 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:58:55,267 INFO L168 Benchmark]: Toolchain (without parser) took 35101.75 ms. Allocated memory was 52.4 MB in the beginning and 283.1 MB in the end (delta: 230.7 MB). Free memory was 29.0 MB in the beginning and 124.8 MB in the end (delta: -95.8 MB). Peak memory consumption was 134.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:55,268 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 52.4 MB. Free memory was 34.0 MB in the beginning and 34.0 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:55,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 578.73 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 28.8 MB in the beginning and 52.5 MB in the end (delta: -23.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:55,269 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.66 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 50.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:55,269 INFO L168 Benchmark]: Boogie Preprocessor took 79.62 ms. Allocated memory is still 71.3 MB. Free memory was 50.6 MB in the beginning and 49.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:55,270 INFO L168 Benchmark]: RCFGBuilder took 754.38 ms. Allocated memory is still 71.3 MB. Free memory was 49.0 MB in the beginning and 45.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:55,271 INFO L168 Benchmark]: TraceAbstraction took 33468.48 ms. Allocated memory was 71.3 MB in the beginning and 283.1 MB in the end (delta: 211.8 MB). Free memory was 45.3 MB in the beginning and 131.1 MB in the end (delta: -85.8 MB). Peak memory consumption was 125.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:55,271 INFO L168 Benchmark]: Witness Printer took 122.05 ms. Allocated memory is still 283.1 MB. Free memory was 130.1 MB in the beginning and 124.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:55,274 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 52.4 MB. Free memory was 34.0 MB in the beginning and 34.0 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 578.73 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 28.8 MB in the beginning and 52.5 MB in the end (delta: -23.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.66 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 50.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.62 ms. Allocated memory is still 71.3 MB. Free memory was 50.6 MB in the beginning and 49.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 754.38 ms. Allocated memory is still 71.3 MB. Free memory was 49.0 MB in the beginning and 45.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 33468.48 ms. Allocated memory was 71.3 MB in the beginning and 283.1 MB in the end (delta: 211.8 MB). Free memory was 45.3 MB in the beginning and 131.1 MB in the end (delta: -85.8 MB). Peak memory consumption was 125.2 MB. Max. memory is 16.1 GB. * Witness Printer took 122.05 ms. Allocated memory is still 283.1 MB. Free memory was 130.1 MB in the beginning and 124.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L116] unsigned int a, b, r; [L118] a = __VERIFIER_nondet_uint() [L119] b = __VERIFIER_nondet_uint() [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND TRUE a3 == (unsigned char)0 [L52] na = na - 1 [L53] COND TRUE a2 == (unsigned char)0 [L54] na = na - 1 [L55] COND TRUE a1 == (unsigned char)0 [L56] na = na - 1 [L60] nb = (unsigned char)4 [L61] COND TRUE b3 == (unsigned char)0 [L62] nb = nb - 1 [L63] COND TRUE b2 == (unsigned char)0 [L64] nb = nb - 1 [L65] COND TRUE b1 == (unsigned char)0 [L66] nb = nb - 1 [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND TRUE partial_sum > ((unsigned char)254) [L88] partial_sum = partial_sum & ((unsigned char)255) [L89] carry = (unsigned short)1 [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND FALSE !(i < na) [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)254)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND TRUE i == (unsigned char)1 [L92] r1 = (unsigned char)partial_sum [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND TRUE i == (unsigned char)2 [L102] r2 = (unsigned char)0 [L103] COND FALSE !(i == (unsigned char)3) [L105] i = i + (unsigned char)1 [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND FALSE !(i == (unsigned char)2) [L103] COND TRUE i == (unsigned char)3 [L103] r3 = (unsigned char)0 [L105] i = i + (unsigned char)1 [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L121] r = mp_add(a, b) [L16] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "byte_add-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.3s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 22.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1142 SDtfs, 5679 SDslu, 7018 SDs, 0 SdLazy, 6370 SolverSat, 736 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 807 GetRequests, 630 SyntacticMatches, 6 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3794occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 4086 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 429 NumberOfCodeBlocks, 429 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 722 ConstructedInterpolants, 27 QuantifiedInterpolants, 284657 SizeOfPredicates, 42 NumberOfNonLiveVariables, 904 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 24 InterpolantComputations, 16 PerfectInterpolantSequences, 69/102 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...