./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum10.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_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum10.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 6c00c1225dae238bedea18c737f72ae44fea020a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:22:27,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:22:27,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:22:27,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:22:27,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:22:27,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:22:27,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:22:27,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:22:27,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:22:27,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:22:27,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:22:27,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:22:27,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:22:27,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:22:27,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:22:27,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:22:27,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:22:27,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:22:27,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:22:27,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:22:27,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:22:27,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:22:27,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:22:27,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:22:27,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:22:27,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:22:27,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:22:27,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:22:27,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:22:27,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:22:27,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:22:27,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:22:27,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:22:27,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:22:27,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:22:27,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:22:27,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:22:27,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:22:27,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:22:27,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:22:27,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:22:27,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:22:27,382 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:22:27,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:22:27,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:22:27,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:22:27,389 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:22:27,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:22:27,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:22:27,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:22:27,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:22:27,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:22:27,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:22:27,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:22:27,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:22:27,392 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:22:27,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:22:27,393 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:22:27,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:22:27,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:22:27,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:22:27,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:22:27,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:22:27,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:22:27,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:22:27,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:22:27,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:22:27,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:22:27,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:22:27,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:22:27,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:22:27,397 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_a058c416-078e-43a0-ad50-84d569d8e3f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2020-11-29 18:22:27,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:22:27,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:22:27,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:22:27,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:22:27,723 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:22:27,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-11-29 18:22:27,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/data/53a156096/826a70d5a2744ebda77f6c2b9cc05ef3/FLAG8975d4f1a [2020-11-29 18:22:28,269 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:22:28,269 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-11-29 18:22:28,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/data/53a156096/826a70d5a2744ebda77f6c2b9cc05ef3/FLAG8975d4f1a [2020-11-29 18:22:28,647 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/data/53a156096/826a70d5a2744ebda77f6c2b9cc05ef3 [2020-11-29 18:22:28,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:22:28,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:22:28,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:22:28,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:22:28,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:22:28,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:28,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46eacfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28, skipping insertion in model container [2020-11-29 18:22:28,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:28,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:22:28,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:22:28,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:22:28,937 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:22:28,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:22:28,995 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:22:28,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28 WrapperNode [2020-11-29 18:22:28,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:22:28,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:22:28,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:22:28,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:22:29,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:22:29,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:22:29,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:22:29,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:22:29,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... [2020-11-29 18:22:29,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:22:29,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:22:29,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:22:29,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:22:29,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:22:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:22:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:22:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:22:29,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:22:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:22:29,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 18:22:29,622 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:22:29,623 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-29 18:22:29,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:22:29 BoogieIcfgContainer [2020-11-29 18:22:29,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:22:29,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:22:29,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:22:29,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:22:29,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:22:28" (1/3) ... [2020-11-29 18:22:29,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e75579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:22:29, skipping insertion in model container [2020-11-29 18:22:29,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:28" (2/3) ... [2020-11-29 18:22:29,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e75579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:22:29, skipping insertion in model container [2020-11-29 18:22:29,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:22:29" (3/3) ... [2020-11-29 18:22:29,640 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2020-11-29 18:22:29,655 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:22:29,660 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:22:29,678 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:22:29,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:22:29,716 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:22:29,716 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:22:29,716 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:22:29,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:22:29,717 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:22:29,717 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:22:29,717 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:22:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-29 18:22:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 18:22:29,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:29,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:29,741 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1570593938, now seen corresponding path program 1 times [2020-11-29 18:22:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:29,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662647668] [2020-11-29 18:22:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:29,992 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 18:22:29,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662647668] [2020-11-29 18:22:29,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:22:29,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 18:22:29,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963214172] [2020-11-29 18:22:30,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 18:22:30,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 18:22:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:22:30,020 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-29 18:22:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:30,042 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-11-29 18:22:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 18:22:30,044 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-11-29 18:22:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:30,055 INFO L225 Difference]: With dead ends: 58 [2020-11-29 18:22:30,055 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 18:22:30,058 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 18:22:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 18:22:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 18:22:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 18:22:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-11-29 18:22:30,095 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-11-29 18:22:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:30,095 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-11-29 18:22:30,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 18:22:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-11-29 18:22:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 18:22:30,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:30,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:30,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:22:30,098 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash 813479325, now seen corresponding path program 1 times [2020-11-29 18:22:30,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:30,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525758537] [2020-11-29 18:22:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:30,116 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:30,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299804867] [2020-11-29 18:22:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:22:30,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:30,335 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 18:22:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525758537] [2020-11-29 18:22:30,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299804867] [2020-11-29 18:22:30,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:22:30,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:22:30,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381278405] [2020-11-29 18:22:30,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:22:30,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:30,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:22:30,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:22:30,340 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-11-29 18:22:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:30,375 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-11-29 18:22:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:22:30,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-29 18:22:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:30,377 INFO L225 Difference]: With dead ends: 52 [2020-11-29 18:22:30,378 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 18:22:30,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 18:22:30,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 18:22:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-29 18:22:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 18:22:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 18:22:30,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-11-29 18:22:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:30,384 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 18:22:30,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:22:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 18:22:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 18:22:30,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:30,385 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 18:22:30,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 18:22:30,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash -552235489, now seen corresponding path program 1 times [2020-11-29 18:22:30,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:30,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081705519] [2020-11-29 18:22:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:30,685 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 18:22:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081705519] [2020-11-29 18:22:30,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297037439] [2020-11-29 18:22:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:30,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:22:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:30,795 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 18:22:30,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:30,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-29 18:22:30,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130505688] [2020-11-29 18:22:30,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:22:30,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:30,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:22:30,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:30,798 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-11-29 18:22:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:30,863 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-11-29 18:22:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:22:30,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-29 18:22:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:30,865 INFO L225 Difference]: With dead ends: 59 [2020-11-29 18:22:30,865 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 18:22:30,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 18:22:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-29 18:22:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 18:22:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-11-29 18:22:30,872 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-11-29 18:22:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:30,872 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-11-29 18:22:30,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:22:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-11-29 18:22:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 18:22:30,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:30,874 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] [2020-11-29 18:22:31,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:31,100 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash -745215302, now seen corresponding path program 1 times [2020-11-29 18:22:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:31,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115404794] [2020-11-29 18:22:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 18:22:31,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115404794] [2020-11-29 18:22:31,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610018541] [2020-11-29 18:22:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:31,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:22:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:22:31,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:31,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-29 18:22:31,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663697279] [2020-11-29 18:22:31,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:22:31,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:31,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:22:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:31,258 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-11-29 18:22:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:31,280 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-11-29 18:22:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:22:31,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-29 18:22:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:31,282 INFO L225 Difference]: With dead ends: 48 [2020-11-29 18:22:31,282 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 18:22:31,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 18:22:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-11-29 18:22:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 18:22:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-11-29 18:22:31,292 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2020-11-29 18:22:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:31,293 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-11-29 18:22:31,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:22:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-11-29 18:22:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 18:22:31,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:31,297 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] [2020-11-29 18:22:31,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:31,524 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:31,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1253041416, now seen corresponding path program 1 times [2020-11-29 18:22:31,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:31,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929988647] [2020-11-29 18:22:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:22:31,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929988647] [2020-11-29 18:22:31,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763534410] [2020-11-29 18:22:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:31,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 18:22:31,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:22:31,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:31,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-29 18:22:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619701597] [2020-11-29 18:22:31,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:22:31,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:22:31,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:31,707 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 3 states. [2020-11-29 18:22:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:31,880 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2020-11-29 18:22:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:22:31,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-11-29 18:22:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:31,883 INFO L225 Difference]: With dead ends: 81 [2020-11-29 18:22:31,883 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 18:22:31,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:31,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 18:22:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-29 18:22:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 18:22:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-11-29 18:22:31,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2020-11-29 18:22:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:31,892 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-11-29 18:22:31,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:22:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-11-29 18:22:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 18:22:31,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:31,898 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] [2020-11-29 18:22:32,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:32,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash -828492548, now seen corresponding path program 1 times [2020-11-29 18:22:32,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:32,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010714285] [2020-11-29 18:22:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:22:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010714285] [2020-11-29 18:22:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50159369] [2020-11-29 18:22:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 18:22:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:22:32,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:22:32,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 18:22:32,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202974946] [2020-11-29 18:22:32,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:22:32,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:22:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:32,277 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 5 states. [2020-11-29 18:22:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:32,310 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-11-29 18:22:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:22:32,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-29 18:22:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:32,316 INFO L225 Difference]: With dead ends: 92 [2020-11-29 18:22:32,316 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 18:22:32,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 18:22:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-11-29 18:22:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 18:22:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-11-29 18:22:32,322 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 31 [2020-11-29 18:22:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:32,322 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-11-29 18:22:32,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:22:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-11-29 18:22:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 18:22:32,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:32,328 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 18:22:32,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 18:22:32,556 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1808056250, now seen corresponding path program 2 times [2020-11-29 18:22:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:32,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319547942] [2020-11-29 18:22:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 18:22:32,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319547942] [2020-11-29 18:22:32,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671684611] [2020-11-29 18:22:32,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:32,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 18:22:32,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:32,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 18:22:32,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 18:22:32,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:32,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-11-29 18:22:32,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960167291] [2020-11-29 18:22:32,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 18:22:32,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:22:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:22:32,788 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-11-29 18:22:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:32,887 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-11-29 18:22:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:22:32,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-29 18:22:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:32,891 INFO L225 Difference]: With dead ends: 120 [2020-11-29 18:22:32,891 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 18:22:32,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:22:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 18:22:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2020-11-29 18:22:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 18:22:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-11-29 18:22:32,907 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 33 [2020-11-29 18:22:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:32,908 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-11-29 18:22:32,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 18:22:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-11-29 18:22:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 18:22:32,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:32,911 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:33,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:33,132 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -883385759, now seen corresponding path program 1 times [2020-11-29 18:22:33,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:33,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158812011] [2020-11-29 18:22:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 18:22:33,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158812011] [2020-11-29 18:22:33,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382581847] [2020-11-29 18:22:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:22:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 18:22:33,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:22:33,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-11-29 18:22:33,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986164784] [2020-11-29 18:22:33,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:22:33,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:22:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:33,318 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2020-11-29 18:22:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:33,491 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-11-29 18:22:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:22:33,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-11-29 18:22:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:33,494 INFO L225 Difference]: With dead ends: 164 [2020-11-29 18:22:33,494 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 18:22:33,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 18:22:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-11-29 18:22:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 18:22:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-11-29 18:22:33,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 36 [2020-11-29 18:22:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:33,505 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-11-29 18:22:33,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:22:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-11-29 18:22:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 18:22:33,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:33,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-29 18:22:33,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:33,718 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash 984846308, now seen corresponding path program 2 times [2020-11-29 18:22:33,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:33,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118597821] [2020-11-29 18:22:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:33,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:33,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399774061] [2020-11-29 18:22:33,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:33,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:22:33,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:33,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:22:33,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-29 18:22:33,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118597821] [2020-11-29 18:22:33,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:33,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399774061] [2020-11-29 18:22:33,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:33,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 18:22:33,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87667143] [2020-11-29 18:22:33,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 18:22:33,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:33,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:22:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:22:33,935 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 6 states. [2020-11-29 18:22:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:33,968 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-11-29 18:22:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:22:33,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-11-29 18:22:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:33,972 INFO L225 Difference]: With dead ends: 176 [2020-11-29 18:22:33,972 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 18:22:33,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:22:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 18:22:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-11-29 18:22:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 18:22:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-11-29 18:22:33,989 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 47 [2020-11-29 18:22:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:33,989 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-11-29 18:22:33,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 18:22:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-11-29 18:22:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 18:22:33,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:33,992 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2020-11-29 18:22:34,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 18:22:34,207 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash 999874210, now seen corresponding path program 3 times [2020-11-29 18:22:34,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:34,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197544614] [2020-11-29 18:22:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 18:22:34,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197544614] [2020-11-29 18:22:34,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:22:34,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:22:34,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742496762] [2020-11-29 18:22:34,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:22:34,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:34,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:22:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:22:34,288 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2020-11-29 18:22:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:34,369 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-11-29 18:22:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:22:34,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-11-29 18:22:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:34,372 INFO L225 Difference]: With dead ends: 179 [2020-11-29 18:22:34,372 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 18:22:34,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:22:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 18:22:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-11-29 18:22:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 18:22:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-11-29 18:22:34,379 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 49 [2020-11-29 18:22:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:34,382 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-11-29 18:22:34,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:22:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-11-29 18:22:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 18:22:34,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:34,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-29 18:22:34,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 18:22:34,386 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1208175976, now seen corresponding path program 1 times [2020-11-29 18:22:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:34,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070265390] [2020-11-29 18:22:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:34,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:34,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771571203] [2020-11-29 18:22:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:22:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 18:22:34,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070265390] [2020-11-29 18:22:34,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:34,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771571203] [2020-11-29 18:22:34,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:34,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 18:22:34,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912242634] [2020-11-29 18:22:34,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:22:34,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:34,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:22:34,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:34,589 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 7 states. [2020-11-29 18:22:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:34,618 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-11-29 18:22:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:22:34,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-11-29 18:22:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:34,621 INFO L225 Difference]: With dead ends: 160 [2020-11-29 18:22:34,622 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 18:22:34,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 18:22:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-11-29 18:22:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 18:22:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-11-29 18:22:34,637 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2020-11-29 18:22:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:34,637 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-11-29 18:22:34,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:22:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-11-29 18:22:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-29 18:22:34,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:34,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2020-11-29 18:22:34,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:34,868 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:34,869 INFO L82 PathProgramCache]: Analyzing trace with hash -394370218, now seen corresponding path program 2 times [2020-11-29 18:22:34,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:34,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171894274] [2020-11-29 18:22:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:34,890 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:34,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816355048] [2020-11-29 18:22:34,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/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 18:22:34,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:22:34,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:22:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 18:22:35,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171894274] [2020-11-29 18:22:35,085 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:35,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816355048] [2020-11-29 18:22:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:35,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 18:22:35,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708019330] [2020-11-29 18:22:35,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 18:22:35,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:22:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:22:35,087 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 8 states. [2020-11-29 18:22:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:35,129 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-11-29 18:22:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:22:35,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-11-29 18:22:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:35,131 INFO L225 Difference]: With dead ends: 162 [2020-11-29 18:22:35,131 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 18:22:35,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:22:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 18:22:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-29 18:22:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 18:22:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-11-29 18:22:35,138 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 57 [2020-11-29 18:22:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:35,138 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-11-29 18:22:35,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 18:22:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-11-29 18:22:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 18:22:35,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:35,139 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2020-11-29 18:22:35,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:35,339 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -11084652, now seen corresponding path program 3 times [2020-11-29 18:22:35,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:35,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464692174] [2020-11-29 18:22:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:35,352 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:35,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800468839] [2020-11-29 18:22:35,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:35,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 18:22:35,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 18:22:35,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-11-29 18:22:35,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464692174] [2020-11-29 18:22:35,591 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:35,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800468839] [2020-11-29 18:22:35,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:22:35,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:22:35,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967089025] [2020-11-29 18:22:35,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:22:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:22:35,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:22:35,593 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 4 states. [2020-11-29 18:22:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:35,639 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-11-29 18:22:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:22:35,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-11-29 18:22:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:35,641 INFO L225 Difference]: With dead ends: 118 [2020-11-29 18:22:35,641 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 18:22:35,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 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 18:22:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 18:22:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-11-29 18:22:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 18:22:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-11-29 18:22:35,646 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 59 [2020-11-29 18:22:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:35,646 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-11-29 18:22:35,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:22:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-11-29 18:22:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 18:22:35,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:35,647 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2020-11-29 18:22:35,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 18:22:35,847 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:35,848 INFO L82 PathProgramCache]: Analyzing trace with hash -433786478, now seen corresponding path program 1 times [2020-11-29 18:22:35,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:35,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656498566] [2020-11-29 18:22:35,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:35,864 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:35,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260382127] [2020-11-29 18:22:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:35,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:22:35,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 18:22:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656498566] [2020-11-29 18:22:36,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260382127] [2020-11-29 18:22:36,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:36,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 18:22:36,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995351714] [2020-11-29 18:22:36,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 18:22:36,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:36,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:22:36,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:22:36,048 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 9 states. [2020-11-29 18:22:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:36,089 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-11-29 18:22:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:22:36,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-11-29 18:22:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:36,090 INFO L225 Difference]: With dead ends: 108 [2020-11-29 18:22:36,090 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 18:22:36,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:22:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 18:22:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-11-29 18:22:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 18:22:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-11-29 18:22:36,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 59 [2020-11-29 18:22:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:36,094 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-11-29 18:22:36,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 18:22:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-11-29 18:22:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 18:22:36,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:36,095 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 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] [2020-11-29 18:22:36,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 18:22:36,308 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1463545008, now seen corresponding path program 2 times [2020-11-29 18:22:36,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:36,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275770183] [2020-11-29 18:22:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:36,321 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:36,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554389852] [2020-11-29 18:22:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:36,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:22:36,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:22:36,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 18:22:36,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275770183] [2020-11-29 18:22:36,595 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:36,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554389852] [2020-11-29 18:22:36,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:36,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 18:22:36,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280107337] [2020-11-29 18:22:36,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:22:36,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:36,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:22:36,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:22:36,597 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 10 states. [2020-11-29 18:22:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:36,647 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-11-29 18:22:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:22:36,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-11-29 18:22:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:36,650 INFO L225 Difference]: With dead ends: 110 [2020-11-29 18:22:36,650 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 18:22:36,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:22:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 18:22:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-11-29 18:22:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 18:22:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-11-29 18:22:36,654 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2020-11-29 18:22:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:36,654 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-11-29 18:22:36,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:22:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-11-29 18:22:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-29 18:22:36,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:36,655 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 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] [2020-11-29 18:22:36,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 18:22:36,855 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1075953038, now seen corresponding path program 3 times [2020-11-29 18:22:36,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:36,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804558561] [2020-11-29 18:22:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:36,867 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:36,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151663953] [2020-11-29 18:22:36,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:36,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 18:22:36,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 18:22:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 18:22:36,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804558561] [2020-11-29 18:22:36,982 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:36,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151663953] [2020-11-29 18:22:36,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:36,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-29 18:22:36,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173741229] [2020-11-29 18:22:36,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:22:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:22:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:22:36,991 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 4 states. [2020-11-29 18:22:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:37,014 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-11-29 18:22:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:22:37,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-11-29 18:22:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:37,015 INFO L225 Difference]: With dead ends: 84 [2020-11-29 18:22:37,015 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 18:22:37,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 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 18:22:37,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 18:22:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-11-29 18:22:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 18:22:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-11-29 18:22:37,019 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2020-11-29 18:22:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:37,023 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-11-29 18:22:37,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:22:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-11-29 18:22:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-29 18:22:37,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:37,026 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 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] [2020-11-29 18:22:37,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:37,227 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1189377332, now seen corresponding path program 4 times [2020-11-29 18:22:37,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:37,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106898285] [2020-11-29 18:22:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:37,239 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835381581] [2020-11-29 18:22:37,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:37,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:22:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:22:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-29 18:22:37,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106898285] [2020-11-29 18:22:37,379 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:37,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835381581] [2020-11-29 18:22:37,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:37,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 18:22:37,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119957035] [2020-11-29 18:22:37,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:22:37,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:22:37,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:37,381 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2020-11-29 18:22:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:37,506 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-11-29 18:22:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:22:37,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-11-29 18:22:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:37,508 INFO L225 Difference]: With dead ends: 119 [2020-11-29 18:22:37,508 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 18:22:37,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 18:22:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-11-29 18:22:37,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 18:22:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-11-29 18:22:37,513 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 65 [2020-11-29 18:22:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:37,514 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-11-29 18:22:37,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:22:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-11-29 18:22:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-29 18:22:37,514 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:37,515 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 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] [2020-11-29 18:22:37,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 18:22:37,715 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1276239541, now seen corresponding path program 5 times [2020-11-29 18:22:37,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:37,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694270381] [2020-11-29 18:22:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:37,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:37,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749260954] [2020-11-29 18:22:37,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:37,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-29 18:22:37,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:22:37,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-29 18:22:37,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694270381] [2020-11-29 18:22:37,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:37,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749260954] [2020-11-29 18:22:37,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:37,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 18:22:37,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663454637] [2020-11-29 18:22:37,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 18:22:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:22:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:22:37,909 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 6 states. [2020-11-29 18:22:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:38,037 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2020-11-29 18:22:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:22:38,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-11-29 18:22:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:38,039 INFO L225 Difference]: With dead ends: 134 [2020-11-29 18:22:38,039 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 18:22:38,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:22:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 18:22:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-11-29 18:22:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 18:22:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-11-29 18:22:38,044 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 74 [2020-11-29 18:22:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:38,044 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-11-29 18:22:38,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 18:22:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-11-29 18:22:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-29 18:22:38,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:38,045 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:38,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 18:22:38,246 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:38,247 INFO L82 PathProgramCache]: Analyzing trace with hash 330377580, now seen corresponding path program 6 times [2020-11-29 18:22:38,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:38,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045745182] [2020-11-29 18:22:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:38,269 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:38,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538762056] [2020-11-29 18:22:38,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:38,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-29 18:22:38,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:22:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-29 18:22:38,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045745182] [2020-11-29 18:22:38,599 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:38,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538762056] [2020-11-29 18:22:38,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:38,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 18:22:38,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934036739] [2020-11-29 18:22:38,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:22:38,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:22:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:38,602 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 5 states. [2020-11-29 18:22:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:38,636 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-11-29 18:22:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:22:38,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-11-29 18:22:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:38,638 INFO L225 Difference]: With dead ends: 110 [2020-11-29 18:22:38,638 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 18:22:38,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 18:22:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-11-29 18:22:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 18:22:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-11-29 18:22:38,642 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 83 [2020-11-29 18:22:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:38,643 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-11-29 18:22:38,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:22:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-11-29 18:22:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-29 18:22:38,643 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:38,646 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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 18:22:38,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:38,846 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1018548394, now seen corresponding path program 7 times [2020-11-29 18:22:38,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:38,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686221107] [2020-11-29 18:22:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:38,857 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:38,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550962964] [2020-11-29 18:22:38,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:22:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-11-29 18:22:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686221107] [2020-11-29 18:22:39,081 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550962964] [2020-11-29 18:22:39,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:39,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 18:22:39,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641466616] [2020-11-29 18:22:39,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 18:22:39,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:22:39,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:22:39,083 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 11 states. [2020-11-29 18:22:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:39,149 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-11-29 18:22:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:22:39,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-11-29 18:22:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:39,151 INFO L225 Difference]: With dead ends: 156 [2020-11-29 18:22:39,151 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 18:22:39,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:22:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 18:22:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-29 18:22:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 18:22:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-11-29 18:22:39,156 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 85 [2020-11-29 18:22:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:39,158 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-11-29 18:22:39,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 18:22:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-11-29 18:22:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-29 18:22:39,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:39,159 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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 18:22:39,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:39,359 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash -471326488, now seen corresponding path program 8 times [2020-11-29 18:22:39,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:39,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666286561] [2020-11-29 18:22:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:39,381 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:39,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742255876] [2020-11-29 18:22:39,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:39,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:22:39,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:39,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:22:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-11-29 18:22:39,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666286561] [2020-11-29 18:22:39,652 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:39,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742255876] [2020-11-29 18:22:39,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:39,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 18:22:39,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507686868] [2020-11-29 18:22:39,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:22:39,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:22:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:22:39,654 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-11-29 18:22:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:39,694 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2020-11-29 18:22:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:22:39,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-11-29 18:22:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:39,696 INFO L225 Difference]: With dead ends: 157 [2020-11-29 18:22:39,696 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 18:22:39,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:22:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 18:22:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-11-29 18:22:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 18:22:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-11-29 18:22:39,700 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 87 [2020-11-29 18:22:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:39,700 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-11-29 18:22:39,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:22:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-11-29 18:22:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-29 18:22:39,700 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:39,700 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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 18:22:39,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:39,901 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:39,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2016978522, now seen corresponding path program 9 times [2020-11-29 18:22:39,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:39,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155992169] [2020-11-29 18:22:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:39,912 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:39,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628219261] [2020-11-29 18:22:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:40,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 18:22:40,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:22:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-11-29 18:22:40,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155992169] [2020-11-29 18:22:40,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:40,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628219261] [2020-11-29 18:22:40,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:40,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 18:22:40,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302804386] [2020-11-29 18:22:40,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:22:40,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:40,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:22:40,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:40,308 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 5 states. [2020-11-29 18:22:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:40,408 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-11-29 18:22:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:22:40,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-11-29 18:22:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:40,411 INFO L225 Difference]: With dead ends: 155 [2020-11-29 18:22:40,411 INFO L226 Difference]: Without dead ends: 105 [2020-11-29 18:22:40,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:22:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-29 18:22:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-11-29 18:22:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 18:22:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-11-29 18:22:40,414 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 89 [2020-11-29 18:22:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:40,414 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-11-29 18:22:40,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:22:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-11-29 18:22:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-29 18:22:40,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:40,415 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:40,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 18:22:40,616 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:40,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash -751149159, now seen corresponding path program 10 times [2020-11-29 18:22:40,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:40,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608846906] [2020-11-29 18:22:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:40,633 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:40,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42285362] [2020-11-29 18:22:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:40,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:22:40,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:22:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-29 18:22:40,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608846906] [2020-11-29 18:22:40,763 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:40,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42285362] [2020-11-29 18:22:40,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:40,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 18:22:40,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50961721] [2020-11-29 18:22:40,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:22:40,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:22:40,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:40,764 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 7 states. [2020-11-29 18:22:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:40,865 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-11-29 18:22:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:22:40,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-11-29 18:22:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:40,867 INFO L225 Difference]: With dead ends: 175 [2020-11-29 18:22:40,867 INFO L226 Difference]: Without dead ends: 111 [2020-11-29 18:22:40,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-29 18:22:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-11-29 18:22:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-29 18:22:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-11-29 18:22:40,872 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 98 [2020-11-29 18:22:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:40,873 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-11-29 18:22:40,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:22:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-11-29 18:22:40,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-29 18:22:40,874 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:40,874 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:41,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 18:22:41,096 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash -415195072, now seen corresponding path program 11 times [2020-11-29 18:22:41,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:41,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248746912] [2020-11-29 18:22:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:41,108 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:41,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331772501] [2020-11-29 18:22:41,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:41,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-29 18:22:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:22:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-11-29 18:22:41,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248746912] [2020-11-29 18:22:41,421 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:41,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331772501] [2020-11-29 18:22:41,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:41,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 18:22:41,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533380144] [2020-11-29 18:22:41,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 18:22:41,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:22:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:22:41,423 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 8 states. [2020-11-29 18:22:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:41,554 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2020-11-29 18:22:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:22:41,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2020-11-29 18:22:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:41,556 INFO L225 Difference]: With dead ends: 187 [2020-11-29 18:22:41,556 INFO L226 Difference]: Without dead ends: 117 [2020-11-29 18:22:41,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:22:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-29 18:22:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-11-29 18:22:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-29 18:22:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-11-29 18:22:41,565 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 107 [2020-11-29 18:22:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:41,566 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-11-29 18:22:41,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 18:22:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-11-29 18:22:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-29 18:22:41,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:41,567 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:41,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:41,768 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:41,768 INFO L82 PathProgramCache]: Analyzing trace with hash -240955271, now seen corresponding path program 12 times [2020-11-29 18:22:41,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:41,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024885860] [2020-11-29 18:22:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:41,784 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:41,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157697750] [2020-11-29 18:22:41,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:42,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 18:22:42,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:22:42,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-11-29 18:22:42,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024885860] [2020-11-29 18:22:42,485 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:42,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157697750] [2020-11-29 18:22:42,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:42,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 18:22:42,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700495274] [2020-11-29 18:22:42,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 18:22:42,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:42,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:22:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:22:42,488 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 6 states. [2020-11-29 18:22:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:42,517 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-11-29 18:22:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:22:42,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-11-29 18:22:42,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:42,519 INFO L225 Difference]: With dead ends: 152 [2020-11-29 18:22:42,519 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 18:22:42,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:22:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 18:22:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-11-29 18:22:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-29 18:22:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-11-29 18:22:42,525 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 116 [2020-11-29 18:22:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:42,526 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-11-29 18:22:42,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 18:22:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-11-29 18:22:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-29 18:22:42,527 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:42,527 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:42,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 18:22:42,728 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:42,728 INFO L82 PathProgramCache]: Analyzing trace with hash 828658235, now seen corresponding path program 13 times [2020-11-29 18:22:42,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:42,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927226447] [2020-11-29 18:22:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:42,738 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:42,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154822201] [2020-11-29 18:22:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:22:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-11-29 18:22:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927226447] [2020-11-29 18:22:42,927 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:42,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154822201] [2020-11-29 18:22:42,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:42,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 18:22:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617225988] [2020-11-29 18:22:42,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 18:22:42,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:22:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:22:42,929 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 11 states. [2020-11-29 18:22:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:43,150 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2020-11-29 18:22:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:22:43,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 118 [2020-11-29 18:22:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:43,152 INFO L225 Difference]: With dead ends: 204 [2020-11-29 18:22:43,152 INFO L226 Difference]: Without dead ends: 134 [2020-11-29 18:22:43,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:22:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-29 18:22:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-11-29 18:22:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-29 18:22:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2020-11-29 18:22:43,158 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 118 [2020-11-29 18:22:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:43,159 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2020-11-29 18:22:43,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 18:22:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2020-11-29 18:22:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-29 18:22:43,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:43,160 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:43,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:43,372 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:43,372 INFO L82 PathProgramCache]: Analyzing trace with hash -399032988, now seen corresponding path program 14 times [2020-11-29 18:22:43,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:43,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550108329] [2020-11-29 18:22:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:43,379 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:43,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726637810] [2020-11-29 18:22:43,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:43,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:22:43,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:43,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:22:43,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-11-29 18:22:43,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550108329] [2020-11-29 18:22:43,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726637810] [2020-11-29 18:22:43,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:43,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 18:22:43,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145521330] [2020-11-29 18:22:43,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:22:43,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:43,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:22:43,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:22:43,666 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand 12 states. [2020-11-29 18:22:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:43,848 INFO L93 Difference]: Finished difference Result 213 states and 240 transitions. [2020-11-29 18:22:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:22:43,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 127 [2020-11-29 18:22:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:43,849 INFO L225 Difference]: With dead ends: 213 [2020-11-29 18:22:43,849 INFO L226 Difference]: Without dead ends: 137 [2020-11-29 18:22:43,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:22:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-29 18:22:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-11-29 18:22:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-29 18:22:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2020-11-29 18:22:43,855 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 127 [2020-11-29 18:22:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:43,855 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2020-11-29 18:22:43,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:22:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2020-11-29 18:22:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-29 18:22:43,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:43,857 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:44,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 18:22:44,057 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:44,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1063535195, now seen corresponding path program 15 times [2020-11-29 18:22:44,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:44,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304603600] [2020-11-29 18:22:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:44,070 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:44,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863178503] [2020-11-29 18:22:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:44,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 18:22:44,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:44,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:22:44,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-29 18:22:44,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304603600] [2020-11-29 18:22:44,650 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:44,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863178503] [2020-11-29 18:22:44,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:44,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 18:22:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821916557] [2020-11-29 18:22:44,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:22:44,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:22:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:44,652 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand 7 states. [2020-11-29 18:22:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:44,710 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2020-11-29 18:22:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:22:44,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-11-29 18:22:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:44,712 INFO L225 Difference]: With dead ends: 178 [2020-11-29 18:22:44,712 INFO L226 Difference]: Without dead ends: 140 [2020-11-29 18:22:44,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:22:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-29 18:22:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-11-29 18:22:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-29 18:22:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2020-11-29 18:22:44,719 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 136 [2020-11-29 18:22:44,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:44,719 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2020-11-29 18:22:44,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:22:44,719 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2020-11-29 18:22:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-29 18:22:44,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:44,721 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:44,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 18:22:44,921 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1110768157, now seen corresponding path program 16 times [2020-11-29 18:22:44,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:44,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323582327] [2020-11-29 18:22:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:44,931 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:44,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811302116] [2020-11-29 18:22:44,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:45,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:22:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:22:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-29 18:22:45,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323582327] [2020-11-29 18:22:45,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:45,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811302116] [2020-11-29 18:22:45,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:45,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 18:22:45,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975447612] [2020-11-29 18:22:45,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 18:22:45,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:22:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:22:45,130 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand 8 states. [2020-11-29 18:22:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:45,156 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2020-11-29 18:22:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:22:45,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2020-11-29 18:22:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:45,164 INFO L225 Difference]: With dead ends: 180 [2020-11-29 18:22:45,164 INFO L226 Difference]: Without dead ends: 142 [2020-11-29 18:22:45,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:22:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-29 18:22:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-11-29 18:22:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-11-29 18:22:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 157 transitions. [2020-11-29 18:22:45,171 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 157 transitions. Word has length 138 [2020-11-29 18:22:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:45,171 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 157 transitions. [2020-11-29 18:22:45,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 18:22:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 157 transitions. [2020-11-29 18:22:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-11-29 18:22:45,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:45,173 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:45,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 18:22:45,388 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash -742995617, now seen corresponding path program 17 times [2020-11-29 18:22:45,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:45,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128414240] [2020-11-29 18:22:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:45,398 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:45,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981817450] [2020-11-29 18:22:45,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:46,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-29 18:22:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:22:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-29 18:22:46,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128414240] [2020-11-29 18:22:46,289 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:46,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981817450] [2020-11-29 18:22:46,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:46,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 18:22:46,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881687817] [2020-11-29 18:22:46,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 18:22:46,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:22:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:22:46,291 INFO L87 Difference]: Start difference. First operand 141 states and 157 transitions. Second operand 9 states. [2020-11-29 18:22:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:46,336 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2020-11-29 18:22:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:22:46,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2020-11-29 18:22:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:46,338 INFO L225 Difference]: With dead ends: 182 [2020-11-29 18:22:46,338 INFO L226 Difference]: Without dead ends: 144 [2020-11-29 18:22:46,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:22:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-29 18:22:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-11-29 18:22:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-29 18:22:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-11-29 18:22:46,348 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 140 [2020-11-29 18:22:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:46,348 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-11-29 18:22:46,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 18:22:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-11-29 18:22:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-29 18:22:46,350 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:46,350 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:46,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:46,551 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash 201445409, now seen corresponding path program 18 times [2020-11-29 18:22:46,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:46,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369458959] [2020-11-29 18:22:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:46,560 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:46,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410987293] [2020-11-29 18:22:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:47,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-29 18:22:47,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:22:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:22:47,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-29 18:22:47,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369458959] [2020-11-29 18:22:47,876 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:47,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410987293] [2020-11-29 18:22:47,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:47,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 18:22:47,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96804613] [2020-11-29 18:22:47,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:22:47,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:47,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:22:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:22:47,877 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 10 states. [2020-11-29 18:22:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:47,920 INFO L93 Difference]: Finished difference Result 184 states and 205 transitions. [2020-11-29 18:22:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:22:47,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 142 [2020-11-29 18:22:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:47,924 INFO L225 Difference]: With dead ends: 184 [2020-11-29 18:22:47,924 INFO L226 Difference]: Without dead ends: 146 [2020-11-29 18:22:47,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:22:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-29 18:22:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-11-29 18:22:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-29 18:22:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-11-29 18:22:47,930 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 142 [2020-11-29 18:22:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:47,931 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-11-29 18:22:47,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:22:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-11-29 18:22:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-29 18:22:47,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:47,932 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:48,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 18:22:48,139 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1571171939, now seen corresponding path program 19 times [2020-11-29 18:22:48,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:48,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733774906] [2020-11-29 18:22:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:48,151 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:48,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811164673] [2020-11-29 18:22:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:22:48,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:22:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:22:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-29 18:22:48,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733774906] [2020-11-29 18:22:48,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:22:48,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811164673] [2020-11-29 18:22:48,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:22:48,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 18:22:48,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577502297] [2020-11-29 18:22:48,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 18:22:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:22:48,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:22:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:22:48,379 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 11 states. [2020-11-29 18:22:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:22:48,425 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-11-29 18:22:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:22:48,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-11-29 18:22:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:22:48,427 INFO L225 Difference]: With dead ends: 185 [2020-11-29 18:22:48,427 INFO L226 Difference]: Without dead ends: 147 [2020-11-29 18:22:48,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:22:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-29 18:22:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-11-29 18:22:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-29 18:22:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2020-11-29 18:22:48,437 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 144 [2020-11-29 18:22:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:22:48,437 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2020-11-29 18:22:48,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 18:22:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2020-11-29 18:22:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-29 18:22:48,439 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:22:48,439 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:22:48,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:48,664 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:22:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:22:48,664 INFO L82 PathProgramCache]: Analyzing trace with hash -676592603, now seen corresponding path program 20 times [2020-11-29 18:22:48,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:22:48,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080473779] [2020-11-29 18:22:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:22:48,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:22:48,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559451735] [2020-11-29 18:22:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:22:49,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:22:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 18:22:49,084 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:22:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:22:49,449 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:22:49,689 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:22:49,689 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:22:49,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-29 18:22:50,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:22:50 BoogieIcfgContainer [2020-11-29 18:22:50,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:22:50,039 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:22:50,039 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:22:50,039 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:22:50,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:22:29" (3/4) ... [2020-11-29 18:22:50,041 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:22:50,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a058c416-078e-43a0-ad50-84d569d8e3f5/bin/uautomizer/witness.graphml [2020-11-29 18:22:50,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:22:50,140 INFO L168 Benchmark]: Toolchain (without parser) took 21488.76 ms. Allocated memory was 113.2 MB in the beginning and 218.1 MB in the end (delta: 104.9 MB). Free memory was 79.3 MB in the beginning and 78.3 MB in the end (delta: 975.7 kB). Peak memory consumption was 105.8 MB. Max. memory is 16.1 GB. [2020-11-29 18:22:50,141 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 86.7 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:22:50,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.58 ms. Allocated memory is still 113.2 MB. Free memory was 79.0 MB in the beginning and 89.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:22:50,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.14 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:22:50,142 INFO L168 Benchmark]: Boogie Preprocessor took 32.74 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 85.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:22:50,143 INFO L168 Benchmark]: RCFGBuilder took 548.08 ms. Allocated memory is still 113.2 MB. Free memory was 85.7 MB in the beginning and 67.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 18:22:50,143 INFO L168 Benchmark]: TraceAbstraction took 20411.48 ms. Allocated memory was 113.2 MB in the beginning and 218.1 MB in the end (delta: 104.9 MB). Free memory was 66.8 MB in the beginning and 89.8 MB in the end (delta: -23.0 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:22:50,144 INFO L168 Benchmark]: Witness Printer took 100.51 ms. Allocated memory is still 218.1 MB. Free memory was 89.8 MB in the beginning and 78.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:22:50,146 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 86.7 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.58 ms. Allocated memory is still 113.2 MB. Free memory was 79.0 MB in the beginning and 89.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.14 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.74 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 85.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 548.08 ms. Allocated memory is still 113.2 MB. Free memory was 85.7 MB in the beginning and 67.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20411.48 ms. Allocated memory was 113.2 MB in the beginning and 218.1 MB in the end (delta: 104.9 MB). Free memory was 66.8 MB in the beginning and 89.8 MB in the end (delta: -23.0 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. * Witness Printer took 100.51 ms. Allocated memory is still 218.1 MB. Free memory was 89.8 MB in the beginning and 78.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 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: [L42] int x[10]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 10) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<10 -1) [L57] x[10 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "rangesum10.c", 18, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.1s, OverallIterations: 33, TraceHistogramMax: 10, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 983 SDtfs, 679 SDslu, 1437 SDs, 0 SdLazy, 956 SolverSat, 356 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2349 GetRequests, 2185 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 32 MinimizatonAttempts, 131 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 2741 NumberOfCodeBlocks, 2453 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 2557 ConstructedInterpolants, 0 QuantifiedInterpolants, 296487 SizeOfPredicates, 36 NumberOfNonLiveVariables, 6635 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 38 InterpolantComputations, 8 PerfectInterpolantSequences, 5483/6277 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...