./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_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum10.i -s /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:48,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:48,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:48,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:48,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:48,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:48,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:48,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:48,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:48,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:48,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:48,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:48,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:48,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:48,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:48,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:48,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:48,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:48,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:48,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:48,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:48,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:48,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:48,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:48,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:48,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:48,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:48,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:48,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:48,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:48,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:48,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:48,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:48,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:48,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:48,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:48,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:48,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:48,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:48,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:48,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:48,397 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:58:48,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:48,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:48,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:48,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:48,432 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:48,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:48,432 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:48,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:48,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:48,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:48,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:48,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:48,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:48,435 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:48,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:48,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:48,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:48,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:48,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:48,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:48,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:48,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:48,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:48,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:48,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:48,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:48,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:58:48,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:48,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:48,440 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_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2020-11-28 02:58:48,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:48,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:48,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:48,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:48,788 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:48,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-11-28 02:58:48,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/data/56d76e032/acfb0da73d644657b076f8edc7f4f8e7/FLAGcba409e1a [2020-11-28 02:58:49,407 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:49,407 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-11-28 02:58:49,413 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/data/56d76e032/acfb0da73d644657b076f8edc7f4f8e7/FLAGcba409e1a [2020-11-28 02:58:49,785 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/data/56d76e032/acfb0da73d644657b076f8edc7f4f8e7 [2020-11-28 02:58:49,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:49,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:49,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:49,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:49,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:49,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:49" (1/1) ... [2020-11-28 02:58:49,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a623c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:49, skipping insertion in model container [2020-11-28 02:58:49,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:49" (1/1) ... [2020-11-28 02:58:49,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:49,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:50,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:50,056 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:50,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:50,105 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:50,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50 WrapperNode [2020-11-28 02:58:50,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:50,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:50,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:50,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:50,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:50,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:50,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:50,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:50,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... [2020-11-28 02:58:50,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:50,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:50,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:50,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:50,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:50,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:50,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:50,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:58:50,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:50,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:50,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:58:50,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:58:50,832 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:50,832 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-28 02:58:50,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:50 BoogieIcfgContainer [2020-11-28 02:58:50,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:50,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:50,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:50,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:50,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:49" (1/3) ... [2020-11-28 02:58:50,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b227feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:50, skipping insertion in model container [2020-11-28 02:58:50,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:50" (2/3) ... [2020-11-28 02:58:50,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b227feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:50, skipping insertion in model container [2020-11-28 02:58:50,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:50" (3/3) ... [2020-11-28 02:58:50,851 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2020-11-28 02:58:50,864 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:50,869 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:58:50,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:58:50,911 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:50,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:50,919 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:50,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:50,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:50,920 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:50,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:50,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-28 02:58:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:58:50,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:50,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:50,947 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1570593938, now seen corresponding path program 1 times [2020-11-28 02:58:50,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:50,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934695549] [2020-11-28 02:58:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:51,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934695549] [2020-11-28 02:58:51,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:51,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:58:51,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294156991] [2020-11-28 02:58:51,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:58:51,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:58:51,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:51,217 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-28 02:58:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:51,241 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-11-28 02:58:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:51,243 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-11-28 02:58:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:51,251 INFO L225 Difference]: With dead ends: 58 [2020-11-28 02:58:51,251 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 02:58:51,254 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 [2020-11-28 02:58:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 02:58:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 02:58:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 02:58:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-11-28 02:58:51,295 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-11-28 02:58:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:51,295 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-11-28 02:58:51,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:58:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-11-28 02:58:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:58:51,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:51,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:51,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:58:51,297 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:51,299 INFO L82 PathProgramCache]: Analyzing trace with hash 813479325, now seen corresponding path program 1 times [2020-11-28 02:58:51,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:51,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534751581] [2020-11-28 02:58:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:51,321 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:51,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776033703] [2020-11-28 02:58:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:51,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:51,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534751581] [2020-11-28 02:58:51,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:51,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776033703] [2020-11-28 02:58:51,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:51,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:58:51,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940857792] [2020-11-28 02:58:51,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:58:51,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:51,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:58:51,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:58:51,539 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-11-28 02:58:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:51,570 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-11-28 02:58:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:58:51,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-28 02:58:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:51,572 INFO L225 Difference]: With dead ends: 52 [2020-11-28 02:58:51,572 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 02:58:51,573 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 [2020-11-28 02:58:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 02:58:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-28 02:58:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 02:58:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-28 02:58:51,581 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-11-28 02:58:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:51,581 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-28 02:58:51,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:58:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-28 02:58:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:58:51,582 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:51,583 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] [2020-11-28 02:58:51,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 02:58:51,798 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:51,799 INFO L82 PathProgramCache]: Analyzing trace with hash -552235489, now seen corresponding path program 1 times [2020-11-28 02:58:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:51,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699663781] [2020-11-28 02:58:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:51,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699663781] [2020-11-28 02:58:51,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801297887] [2020-11-28 02:58:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:58:52,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:52,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-28 02:58:52,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062786419] [2020-11-28 02:58:52,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:58:52,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:52,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:58:52,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:52,128 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-11-28 02:58:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:52,245 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-11-28 02:58:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:58:52,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-28 02:58:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:52,247 INFO L225 Difference]: With dead ends: 59 [2020-11-28 02:58:52,247 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 02:58:52,248 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 [2020-11-28 02:58:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 02:58:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-28 02:58:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 02:58:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-11-28 02:58:52,256 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-11-28 02:58:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:52,256 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-11-28 02:58:52,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:58:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-11-28 02:58:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:58:52,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:52,259 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] [2020-11-28 02:58:52,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:52,478 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:52,479 INFO L82 PathProgramCache]: Analyzing trace with hash -745215302, now seen corresponding path program 1 times [2020-11-28 02:58:52,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:52,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130037967] [2020-11-28 02:58:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 02:58:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130037967] [2020-11-28 02:58:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093862931] [2020-11-28 02:58:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:52,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:52,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 02:58:52,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:52,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-28 02:58:52,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271858551] [2020-11-28 02:58:52,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:58:52,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:52,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:58:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:52,782 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-11-28 02:58:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:52,808 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-11-28 02:58:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:58:52,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-28 02:58:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:52,810 INFO L225 Difference]: With dead ends: 48 [2020-11-28 02:58:52,810 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 02:58:52,811 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 [2020-11-28 02:58:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 02:58:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-11-28 02:58:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 02:58:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-11-28 02:58:52,818 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2020-11-28 02:58:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:52,818 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-11-28 02:58:52,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:58:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-11-28 02:58:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 02:58:52,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:52,820 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] [2020-11-28 02:58:53,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:53,046 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1253041416, now seen corresponding path program 1 times [2020-11-28 02:58:53,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:53,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069907970] [2020-11-28 02:58:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 02:58:53,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069907970] [2020-11-28 02:58:53,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889557249] [2020-11-28 02:58:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:58:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 02:58:53,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:53,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-28 02:58:53,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861117725] [2020-11-28 02:58:53,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:58:53,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:53,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:58:53,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:53,254 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 3 states. [2020-11-28 02:58:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:53,496 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2020-11-28 02:58:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:58:53,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-11-28 02:58:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:53,508 INFO L225 Difference]: With dead ends: 81 [2020-11-28 02:58:53,508 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 02:58:53,509 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 [2020-11-28 02:58:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 02:58:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-28 02:58:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 02:58:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-11-28 02:58:53,517 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2020-11-28 02:58:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:53,517 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-11-28 02:58:53,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:58:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-11-28 02:58:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 02:58:53,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:53,519 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] [2020-11-28 02:58:53,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:53,738 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -828492548, now seen corresponding path program 1 times [2020-11-28 02:58:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:53,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558888661] [2020-11-28 02:58:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 02:58:53,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558888661] [2020-11-28 02:58:53,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651098104] [2020-11-28 02:58:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:58:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 02:58:53,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:53,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-28 02:58:53,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762383576] [2020-11-28 02:58:53,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:53,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:53,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:53,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:53,983 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 5 states. [2020-11-28 02:58:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:54,030 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-11-28 02:58:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:58:54,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-28 02:58:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:54,032 INFO L225 Difference]: With dead ends: 92 [2020-11-28 02:58:54,032 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 02:58:54,033 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 [2020-11-28 02:58:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 02:58:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-11-28 02:58:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 02:58:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-11-28 02:58:54,047 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 31 [2020-11-28 02:58:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:54,048 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-11-28 02:58:54,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-11-28 02:58:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 02:58:54,051 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:54,051 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] [2020-11-28 02:58:54,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 02:58:54,262 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:54,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1808056250, now seen corresponding path program 2 times [2020-11-28 02:58:54,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:54,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774791829] [2020-11-28 02:58:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 02:58:54,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774791829] [2020-11-28 02:58:54,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316443797] [2020-11-28 02:58:54,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:54,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 02:58:54,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 02:58:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-28 02:58:54,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:54,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-11-28 02:58:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041821307] [2020-11-28 02:58:54,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:58:54,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:54,579 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-11-28 02:58:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:54,755 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-11-28 02:58:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:54,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-28 02:58:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:54,757 INFO L225 Difference]: With dead ends: 120 [2020-11-28 02:58:54,758 INFO L226 Difference]: Without dead ends: 114 [2020-11-28 02:58:54,758 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 [2020-11-28 02:58:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-28 02:58:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2020-11-28 02:58:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-28 02:58:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-11-28 02:58:54,775 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 33 [2020-11-28 02:58:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:54,776 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-11-28 02:58:54,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:58:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-11-28 02:58:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 02:58:54,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:54,778 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] [2020-11-28 02:58:54,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:54,986 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:54,987 INFO L82 PathProgramCache]: Analyzing trace with hash -883385759, now seen corresponding path program 1 times [2020-11-28 02:58:54,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:54,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787758655] [2020-11-28 02:58:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 02:58:55,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787758655] [2020-11-28 02:58:55,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396899438] [2020-11-28 02:58:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:55,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:55,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-28 02:58:55,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:55,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-11-28 02:58:55,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200042278] [2020-11-28 02:58:55,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:58:55,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:55,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:55,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:55,218 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2020-11-28 02:58:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:55,416 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-11-28 02:58:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:55,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-11-28 02:58:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:55,419 INFO L225 Difference]: With dead ends: 164 [2020-11-28 02:58:55,420 INFO L226 Difference]: Without dead ends: 97 [2020-11-28 02:58:55,420 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 [2020-11-28 02:58:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-28 02:58:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-11-28 02:58:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-28 02:58:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-11-28 02:58:55,433 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 36 [2020-11-28 02:58:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:55,433 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-11-28 02:58:55,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:58:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-11-28 02:58:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-28 02:58:55,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:55,436 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] [2020-11-28 02:58:55,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:55,651 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash 984846308, now seen corresponding path program 2 times [2020-11-28 02:58:55,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:55,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99127012] [2020-11-28 02:58:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:55,680 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:55,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024778225] [2020-11-28 02:58:55,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:55,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 02:58:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99127012] [2020-11-28 02:58:55,899 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:55,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024778225] [2020-11-28 02:58:55,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:55,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 02:58:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800174090] [2020-11-28 02:58:55,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:58:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:55,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:58:55,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:55,909 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 6 states. [2020-11-28 02:58:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:55,949 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-11-28 02:58:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:55,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-11-28 02:58:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:55,955 INFO L225 Difference]: With dead ends: 176 [2020-11-28 02:58:55,955 INFO L226 Difference]: Without dead ends: 94 [2020-11-28 02:58:55,956 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 [2020-11-28 02:58:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-28 02:58:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-11-28 02:58:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-28 02:58:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-11-28 02:58:55,977 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 47 [2020-11-28 02:58:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:55,978 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-11-28 02:58:55,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:58:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-11-28 02:58:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-28 02:58:55,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:55,980 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] [2020-11-28 02:58:56,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-28 02:58:56,194 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash 999874210, now seen corresponding path program 3 times [2020-11-28 02:58:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:56,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003673676] [2020-11-28 02:58:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 02:58:56,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003673676] [2020-11-28 02:58:56,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:56,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:56,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046670261] [2020-11-28 02:58:56,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:58:56,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:56,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:58:56,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:58:56,297 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2020-11-28 02:58:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:56,415 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-11-28 02:58:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:58:56,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-11-28 02:58:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:56,419 INFO L225 Difference]: With dead ends: 179 [2020-11-28 02:58:56,419 INFO L226 Difference]: Without dead ends: 109 [2020-11-28 02:58:56,420 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 [2020-11-28 02:58:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-28 02:58:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-11-28 02:58:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-28 02:58:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-11-28 02:58:56,435 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 49 [2020-11-28 02:58:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:56,435 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-11-28 02:58:56,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:58:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-11-28 02:58:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-28 02:58:56,437 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:56,437 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] [2020-11-28 02:58:56,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 02:58:56,437 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1208175976, now seen corresponding path program 1 times [2020-11-28 02:58:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:56,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117740187] [2020-11-28 02:58:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:56,469 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:56,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697117423] [2020-11-28 02:58:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:58:56,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 02:58:56,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117740187] [2020-11-28 02:58:56,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:56,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697117423] [2020-11-28 02:58:56,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:56,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 02:58:56,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517389831] [2020-11-28 02:58:56,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:58:56,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:56,672 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 7 states. [2020-11-28 02:58:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:56,709 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-11-28 02:58:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:56,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-11-28 02:58:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:56,714 INFO L225 Difference]: With dead ends: 160 [2020-11-28 02:58:56,714 INFO L226 Difference]: Without dead ends: 87 [2020-11-28 02:58:56,716 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 [2020-11-28 02:58:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-28 02:58:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-11-28 02:58:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-28 02:58:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-11-28 02:58:56,735 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2020-11-28 02:58:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:56,736 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-11-28 02:58:56,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:58:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-11-28 02:58:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-28 02:58:56,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:56,758 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] [2020-11-28 02:58:56,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:56,959 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:56,959 INFO L82 PathProgramCache]: Analyzing trace with hash -394370218, now seen corresponding path program 2 times [2020-11-28 02:58:56,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:56,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674193333] [2020-11-28 02:58:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:56,974 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:56,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751113579] [2020-11-28 02:58:56,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:57,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:57,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 02:58:57,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674193333] [2020-11-28 02:58:57,197 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:57,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751113579] [2020-11-28 02:58:57,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:57,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 02:58:57,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666578114] [2020-11-28 02:58:57,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:58:57,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:57,201 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 8 states. [2020-11-28 02:58:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:57,245 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-11-28 02:58:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:57,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-11-28 02:58:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:57,249 INFO L225 Difference]: With dead ends: 162 [2020-11-28 02:58:57,249 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 02:58:57,249 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 [2020-11-28 02:58:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 02:58:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-28 02:58:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-28 02:58:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-11-28 02:58:57,257 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 57 [2020-11-28 02:58:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:57,258 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-11-28 02:58:57,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:58:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-11-28 02:58:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-28 02:58:57,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:57,260 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] [2020-11-28 02:58:57,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:57,473 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:57,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:57,474 INFO L82 PathProgramCache]: Analyzing trace with hash -11084652, now seen corresponding path program 3 times [2020-11-28 02:58:57,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:57,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267010592] [2020-11-28 02:58:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:57,497 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:57,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899582669] [2020-11-28 02:58:57,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:57,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 02:58:57,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:58:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-11-28 02:58:57,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267010592] [2020-11-28 02:58:57,816 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:57,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899582669] [2020-11-28 02:58:57,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:57,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:57,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833824640] [2020-11-28 02:58:57,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:58:57,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:58:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:58:57,819 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 4 states. [2020-11-28 02:58:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:57,866 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-11-28 02:58:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:58:57,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-11-28 02:58:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:57,868 INFO L225 Difference]: With dead ends: 118 [2020-11-28 02:58:57,868 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 02:58:57,868 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 [2020-11-28 02:58:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 02:58:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-11-28 02:58:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 02:58:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-11-28 02:58:57,874 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 59 [2020-11-28 02:58:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:57,875 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-11-28 02:58:57,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:58:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-11-28 02:58:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-28 02:58:57,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:57,876 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] [2020-11-28 02:58:58,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 02:58:58,077 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash -433786478, now seen corresponding path program 1 times [2020-11-28 02:58:58,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:58,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687519872] [2020-11-28 02:58:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:58,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:58,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017433315] [2020-11-28 02:58:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:58,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:58:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 02:58:58,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687519872] [2020-11-28 02:58:58,333 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:58,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017433315] [2020-11-28 02:58:58,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:58,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-28 02:58:58,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278192557] [2020-11-28 02:58:58,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:58:58,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:58:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:58,338 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 9 states. [2020-11-28 02:58:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:58,382 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-11-28 02:58:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:58:58,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-11-28 02:58:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:58,383 INFO L225 Difference]: With dead ends: 108 [2020-11-28 02:58:58,384 INFO L226 Difference]: Without dead ends: 63 [2020-11-28 02:58:58,384 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 [2020-11-28 02:58:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-28 02:58:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-11-28 02:58:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-28 02:58:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-11-28 02:58:58,390 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 59 [2020-11-28 02:58:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:58,390 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-11-28 02:58:58,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:58:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-11-28 02:58:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-28 02:58:58,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:58,392 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] [2020-11-28 02:58:58,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 02:58:58,606 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1463545008, now seen corresponding path program 2 times [2020-11-28 02:58:58,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:58,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118502285] [2020-11-28 02:58:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:58,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:58,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291742453] [2020-11-28 02:58:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:58,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:58,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:58,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 02:58:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 02:58:58,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118502285] [2020-11-28 02:58:58,993 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:58,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291742453] [2020-11-28 02:58:58,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:58,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-28 02:58:58,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393735005] [2020-11-28 02:58:58,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:58:58,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:58,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:58:58,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:58,995 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 10 states. [2020-11-28 02:58:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:59,049 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-11-28 02:58:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:58:59,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-11-28 02:58:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:59,050 INFO L225 Difference]: With dead ends: 110 [2020-11-28 02:58:59,050 INFO L226 Difference]: Without dead ends: 65 [2020-11-28 02:58:59,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-28 02:58:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-11-28 02:58:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-28 02:58:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-11-28 02:58:59,056 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2020-11-28 02:58:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:59,056 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-11-28 02:58:59,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:58:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-11-28 02:58:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-28 02:58:59,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:59,057 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] [2020-11-28 02:58:59,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 02:58:59,266 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:59,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1075953038, now seen corresponding path program 3 times [2020-11-28 02:58:59,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:59,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038893256] [2020-11-28 02:58:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:59,291 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:59,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326580338] [2020-11-28 02:58:59,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:59,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 02:58:59,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:59,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:58:59,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 02:58:59,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038893256] [2020-11-28 02:58:59,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:59,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326580338] [2020-11-28 02:58:59,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:59,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-28 02:58:59,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164800801] [2020-11-28 02:58:59,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:58:59,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:58:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:58:59,481 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 4 states. [2020-11-28 02:58:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:59,520 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-11-28 02:58:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:58:59,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-11-28 02:58:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:59,522 INFO L225 Difference]: With dead ends: 84 [2020-11-28 02:58:59,522 INFO L226 Difference]: Without dead ends: 67 [2020-11-28 02:58:59,522 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 [2020-11-28 02:58:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-28 02:58:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-11-28 02:58:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-28 02:58:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-11-28 02:58:59,527 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2020-11-28 02:58:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:59,528 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-11-28 02:58:59,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:58:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-11-28 02:58:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-28 02:58:59,529 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:59,529 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] [2020-11-28 02:58:59,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:59,730 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1189377332, now seen corresponding path program 4 times [2020-11-28 02:58:59,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:59,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160106139] [2020-11-28 02:58:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:59,744 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:59,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227413453] [2020-11-28 02:58:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:58:59,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 02:58:59,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-28 02:58:59,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160106139] [2020-11-28 02:58:59,867 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:59,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227413453] [2020-11-28 02:58:59,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:59,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 02:58:59,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742917445] [2020-11-28 02:58:59,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:59,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:59,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:59,869 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2020-11-28 02:58:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:59,975 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-11-28 02:58:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:58:59,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-11-28 02:58:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:59,977 INFO L225 Difference]: With dead ends: 119 [2020-11-28 02:58:59,977 INFO L226 Difference]: Without dead ends: 78 [2020-11-28 02:58:59,977 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 [2020-11-28 02:58:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-28 02:58:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-11-28 02:58:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-28 02:58:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-11-28 02:58:59,983 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 65 [2020-11-28 02:58:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:59,983 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-11-28 02:58:59,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-11-28 02:58:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-28 02:58:59,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:59,984 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] [2020-11-28 02:59:00,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 02:59:00,198 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:00,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1276239541, now seen corresponding path program 5 times [2020-11-28 02:59:00,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:00,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532508969] [2020-11-28 02:59:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:00,208 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:00,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628118516] [2020-11-28 02:59:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:00,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-28 02:59:00,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:59:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-28 02:59:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532508969] [2020-11-28 02:59:00,404 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628118516] [2020-11-28 02:59:00,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:00,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 02:59:00,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464642615] [2020-11-28 02:59:00,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:59:00,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:00,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:59:00,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:59:00,407 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 6 states. [2020-11-28 02:59:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:00,543 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2020-11-28 02:59:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:59:00,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-11-28 02:59:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:00,545 INFO L225 Difference]: With dead ends: 134 [2020-11-28 02:59:00,545 INFO L226 Difference]: Without dead ends: 87 [2020-11-28 02:59:00,545 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 [2020-11-28 02:59:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-28 02:59:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-11-28 02:59:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-28 02:59:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-11-28 02:59:00,552 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 74 [2020-11-28 02:59:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:00,552 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-11-28 02:59:00,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:59:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-11-28 02:59:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 02:59:00,554 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:00,554 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] [2020-11-28 02:59:00,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 02:59:00,774 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 330377580, now seen corresponding path program 6 times [2020-11-28 02:59:00,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:00,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251835266] [2020-11-28 02:59:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:00,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:00,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547051043] [2020-11-28 02:59:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:01,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-28 02:59:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:59:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-28 02:59:01,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251835266] [2020-11-28 02:59:01,193 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:01,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547051043] [2020-11-28 02:59:01,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:01,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 02:59:01,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162930760] [2020-11-28 02:59:01,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:59:01,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:59:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:01,199 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 5 states. [2020-11-28 02:59:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:01,238 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-11-28 02:59:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:01,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-11-28 02:59:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:01,240 INFO L225 Difference]: With dead ends: 110 [2020-11-28 02:59:01,240 INFO L226 Difference]: Without dead ends: 87 [2020-11-28 02:59:01,240 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 [2020-11-28 02:59:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-28 02:59:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-11-28 02:59:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-28 02:59:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-11-28 02:59:01,246 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 83 [2020-11-28 02:59:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:01,248 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-11-28 02:59:01,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:59:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-11-28 02:59:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-28 02:59:01,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:01,249 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] [2020-11-28 02:59:01,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:01,450 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1018548394, now seen corresponding path program 7 times [2020-11-28 02:59:01,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:01,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553451324] [2020-11-28 02:59:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:01,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:01,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471071113] [2020-11-28 02:59:01,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:01,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:59:01,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-11-28 02:59:01,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553451324] [2020-11-28 02:59:01,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:01,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471071113] [2020-11-28 02:59:01,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:01,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-28 02:59:01,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001219372] [2020-11-28 02:59:01,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:59:01,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:01,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:59:01,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:59:01,711 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 11 states. [2020-11-28 02:59:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:01,776 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-11-28 02:59:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 02:59:01,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-11-28 02:59:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:01,778 INFO L225 Difference]: With dead ends: 156 [2020-11-28 02:59:01,778 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 02:59:01,778 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 [2020-11-28 02:59:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 02:59:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-28 02:59:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-28 02:59:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-11-28 02:59:01,785 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 85 [2020-11-28 02:59:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:01,785 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-11-28 02:59:01,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:59:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-11-28 02:59:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-28 02:59:01,786 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:01,786 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] [2020-11-28 02:59:01,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:01,987 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash -471326488, now seen corresponding path program 8 times [2020-11-28 02:59:01,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:01,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228868237] [2020-11-28 02:59:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:02,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:02,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423012729] [2020-11-28 02:59:02,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:02,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:59:02,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 02:59:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-11-28 02:59:02,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228868237] [2020-11-28 02:59:02,334 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:02,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423012729] [2020-11-28 02:59:02,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:02,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-28 02:59:02,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028623194] [2020-11-28 02:59:02,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 02:59:02,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 02:59:02,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:59:02,337 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-11-28 02:59:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:02,399 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2020-11-28 02:59:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 02:59:02,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-11-28 02:59:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:02,401 INFO L225 Difference]: With dead ends: 157 [2020-11-28 02:59:02,401 INFO L226 Difference]: Without dead ends: 90 [2020-11-28 02:59:02,401 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 [2020-11-28 02:59:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-28 02:59:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-11-28 02:59:02,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-28 02:59:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-11-28 02:59:02,408 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 87 [2020-11-28 02:59:02,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:02,408 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-11-28 02:59:02,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 02:59:02,408 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-11-28 02:59:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-28 02:59:02,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:02,410 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] [2020-11-28 02:59:02,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:02,638 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2016978522, now seen corresponding path program 9 times [2020-11-28 02:59:02,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:02,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702362891] [2020-11-28 02:59:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:02,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:02,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602356329] [2020-11-28 02:59:02,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:02,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 02:59:02,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:02,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:59:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-11-28 02:59:03,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702362891] [2020-11-28 02:59:03,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:03,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602356329] [2020-11-28 02:59:03,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:03,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 02:59:03,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534785345] [2020-11-28 02:59:03,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:59:03,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:59:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:03,038 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 5 states. [2020-11-28 02:59:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:03,156 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-11-28 02:59:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:03,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-11-28 02:59:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:03,158 INFO L225 Difference]: With dead ends: 155 [2020-11-28 02:59:03,158 INFO L226 Difference]: Without dead ends: 105 [2020-11-28 02:59:03,158 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 [2020-11-28 02:59:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-28 02:59:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-11-28 02:59:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-28 02:59:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-11-28 02:59:03,164 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 89 [2020-11-28 02:59:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:03,165 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-11-28 02:59:03,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:59:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-11-28 02:59:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-28 02:59:03,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:03,166 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] [2020-11-28 02:59:03,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-28 02:59:03,390 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash -751149159, now seen corresponding path program 10 times [2020-11-28 02:59:03,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:03,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121323631] [2020-11-28 02:59:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:03,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:03,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908431575] [2020-11-28 02:59:03,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:03,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 02:59:03,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:03,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:59:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-28 02:59:03,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121323631] [2020-11-28 02:59:03,580 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:03,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908431575] [2020-11-28 02:59:03,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:03,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 02:59:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980656279] [2020-11-28 02:59:03,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:59:03,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:59:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:59:03,582 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 7 states. [2020-11-28 02:59:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:03,744 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-11-28 02:59:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:59:03,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-11-28 02:59:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:03,746 INFO L225 Difference]: With dead ends: 175 [2020-11-28 02:59:03,746 INFO L226 Difference]: Without dead ends: 111 [2020-11-28 02:59:03,746 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 [2020-11-28 02:59:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-28 02:59:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-11-28 02:59:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-28 02:59:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-11-28 02:59:03,753 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 98 [2020-11-28 02:59:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:03,753 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-11-28 02:59:03,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:59:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-11-28 02:59:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-28 02:59:03,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:03,755 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] [2020-11-28 02:59:03,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-28 02:59:03,978 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash -415195072, now seen corresponding path program 11 times [2020-11-28 02:59:03,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:03,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169850578] [2020-11-28 02:59:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:03,992 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:03,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629437143] [2020-11-28 02:59:03,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:04,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-28 02:59:04,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:59:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-11-28 02:59:04,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169850578] [2020-11-28 02:59:04,358 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:04,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629437143] [2020-11-28 02:59:04,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:04,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 02:59:04,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174771699] [2020-11-28 02:59:04,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:59:04,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:59:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:59:04,361 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 8 states. [2020-11-28 02:59:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:04,561 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2020-11-28 02:59:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:59:04,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2020-11-28 02:59:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:04,563 INFO L225 Difference]: With dead ends: 187 [2020-11-28 02:59:04,563 INFO L226 Difference]: Without dead ends: 117 [2020-11-28 02:59:04,564 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 [2020-11-28 02:59:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-28 02:59:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-11-28 02:59:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-28 02:59:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-11-28 02:59:04,570 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 107 [2020-11-28 02:59:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:04,571 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-11-28 02:59:04,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:59:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-11-28 02:59:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-28 02:59:04,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:04,573 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] [2020-11-28 02:59:04,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:04,774 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:04,774 INFO L82 PathProgramCache]: Analyzing trace with hash -240955271, now seen corresponding path program 12 times [2020-11-28 02:59:04,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:04,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819378272] [2020-11-28 02:59:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:04,788 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:04,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161875238] [2020-11-28 02:59:04,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:05,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-28 02:59:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:05,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:59:05,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-11-28 02:59:05,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819378272] [2020-11-28 02:59:05,546 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:05,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161875238] [2020-11-28 02:59:05,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:05,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 02:59:05,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138397203] [2020-11-28 02:59:05,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:59:05,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:59:05,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:59:05,548 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 6 states. [2020-11-28 02:59:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:05,583 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-11-28 02:59:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:59:05,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-11-28 02:59:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:05,586 INFO L225 Difference]: With dead ends: 152 [2020-11-28 02:59:05,586 INFO L226 Difference]: Without dead ends: 120 [2020-11-28 02:59:05,586 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 [2020-11-28 02:59:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-28 02:59:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-11-28 02:59:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-28 02:59:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-11-28 02:59:05,593 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 116 [2020-11-28 02:59:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:05,593 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-11-28 02:59:05,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:59:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-11-28 02:59:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-28 02:59:05,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:05,595 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] [2020-11-28 02:59:05,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-28 02:59:05,801 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:05,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:05,801 INFO L82 PathProgramCache]: Analyzing trace with hash 828658235, now seen corresponding path program 13 times [2020-11-28 02:59:05,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:05,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642245615] [2020-11-28 02:59:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:05,818 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:05,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644979890] [2020-11-28 02:59:05,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:59:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-11-28 02:59:06,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642245615] [2020-11-28 02:59:06,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:06,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644979890] [2020-11-28 02:59:06,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:06,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-28 02:59:06,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493278239] [2020-11-28 02:59:06,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:59:06,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:59:06,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:59:06,092 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 11 states. [2020-11-28 02:59:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:06,349 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2020-11-28 02:59:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 02:59:06,350 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 118 [2020-11-28 02:59:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:06,351 INFO L225 Difference]: With dead ends: 204 [2020-11-28 02:59:06,351 INFO L226 Difference]: Without dead ends: 134 [2020-11-28 02:59:06,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:59:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-28 02:59:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-11-28 02:59:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-28 02:59:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2020-11-28 02:59:06,359 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 118 [2020-11-28 02:59:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:06,360 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2020-11-28 02:59:06,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:59:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2020-11-28 02:59:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-28 02:59:06,361 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:06,362 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] [2020-11-28 02:59:06,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:06,574 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:06,575 INFO L82 PathProgramCache]: Analyzing trace with hash -399032988, now seen corresponding path program 14 times [2020-11-28 02:59:06,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:06,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72683010] [2020-11-28 02:59:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:06,594 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:06,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171646564] [2020-11-28 02:59:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:06,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:59:06,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:06,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 02:59:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-11-28 02:59:06,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72683010] [2020-11-28 02:59:06,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:06,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171646564] [2020-11-28 02:59:06,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:06,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-28 02:59:06,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25049320] [2020-11-28 02:59:06,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 02:59:06,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 02:59:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:59:06,977 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand 12 states. [2020-11-28 02:59:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:07,263 INFO L93 Difference]: Finished difference Result 213 states and 240 transitions. [2020-11-28 02:59:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 02:59:07,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 127 [2020-11-28 02:59:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:07,265 INFO L225 Difference]: With dead ends: 213 [2020-11-28 02:59:07,265 INFO L226 Difference]: Without dead ends: 137 [2020-11-28 02:59:07,266 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 [2020-11-28 02:59:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-28 02:59:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-11-28 02:59:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-28 02:59:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2020-11-28 02:59:07,273 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 127 [2020-11-28 02:59:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:07,273 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2020-11-28 02:59:07,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 02:59:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2020-11-28 02:59:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-28 02:59:07,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:07,275 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] [2020-11-28 02:59:07,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-28 02:59:07,475 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:07,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1063535195, now seen corresponding path program 15 times [2020-11-28 02:59:07,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:07,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041408129] [2020-11-28 02:59:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:07,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:07,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910743913] [2020-11-28 02:59:07,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:08,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 02:59:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:59:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-28 02:59:08,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041408129] [2020-11-28 02:59:08,225 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:08,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910743913] [2020-11-28 02:59:08,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:08,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 02:59:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095432006] [2020-11-28 02:59:08,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:59:08,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:59:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:59:08,228 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand 7 states. [2020-11-28 02:59:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:08,289 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2020-11-28 02:59:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:59:08,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-11-28 02:59:08,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:08,291 INFO L225 Difference]: With dead ends: 178 [2020-11-28 02:59:08,291 INFO L226 Difference]: Without dead ends: 140 [2020-11-28 02:59:08,291 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 [2020-11-28 02:59:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-28 02:59:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-11-28 02:59:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-28 02:59:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2020-11-28 02:59:08,301 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 136 [2020-11-28 02:59:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:08,301 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2020-11-28 02:59:08,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:59:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2020-11-28 02:59:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-28 02:59:08,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:08,303 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] [2020-11-28 02:59:08,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-28 02:59:08,509 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1110768157, now seen corresponding path program 16 times [2020-11-28 02:59:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:08,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294299791] [2020-11-28 02:59:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:08,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:08,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515416242] [2020-11-28 02:59:08,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:08,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 02:59:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:08,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:59:08,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-28 02:59:08,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294299791] [2020-11-28 02:59:08,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:08,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515416242] [2020-11-28 02:59:08,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:08,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 02:59:08,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084418571] [2020-11-28 02:59:08,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:59:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:59:08,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:59:08,734 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand 8 states. [2020-11-28 02:59:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:08,806 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2020-11-28 02:59:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:59:08,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2020-11-28 02:59:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:08,809 INFO L225 Difference]: With dead ends: 180 [2020-11-28 02:59:08,809 INFO L226 Difference]: Without dead ends: 142 [2020-11-28 02:59:08,809 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 [2020-11-28 02:59:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-28 02:59:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-11-28 02:59:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-11-28 02:59:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 157 transitions. [2020-11-28 02:59:08,820 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 157 transitions. Word has length 138 [2020-11-28 02:59:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:08,821 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 157 transitions. [2020-11-28 02:59:08,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:59:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 157 transitions. [2020-11-28 02:59:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-11-28 02:59:08,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:08,823 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] [2020-11-28 02:59:09,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-28 02:59:09,025 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:09,025 INFO L82 PathProgramCache]: Analyzing trace with hash -742995617, now seen corresponding path program 17 times [2020-11-28 02:59:09,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:09,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611109627] [2020-11-28 02:59:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:09,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:09,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265068645] [2020-11-28 02:59:09,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:10,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-28 02:59:10,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:10,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:59:10,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-28 02:59:10,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611109627] [2020-11-28 02:59:10,300 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:10,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265068645] [2020-11-28 02:59:10,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:10,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-28 02:59:10,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947387196] [2020-11-28 02:59:10,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:59:10,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:59:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:59:10,302 INFO L87 Difference]: Start difference. First operand 141 states and 157 transitions. Second operand 9 states. [2020-11-28 02:59:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:10,357 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2020-11-28 02:59:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:59:10,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2020-11-28 02:59:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:10,359 INFO L225 Difference]: With dead ends: 182 [2020-11-28 02:59:10,359 INFO L226 Difference]: Without dead ends: 144 [2020-11-28 02:59:10,360 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 [2020-11-28 02:59:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-28 02:59:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-11-28 02:59:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-28 02:59:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-11-28 02:59:10,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 140 [2020-11-28 02:59:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:10,370 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-11-28 02:59:10,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:59:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-11-28 02:59:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-28 02:59:10,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:10,372 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] [2020-11-28 02:59:10,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:10,598 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash 201445409, now seen corresponding path program 18 times [2020-11-28 02:59:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:10,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836945292] [2020-11-28 02:59:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:10,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:10,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539040739] [2020-11-28 02:59:10,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:12,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-28 02:59:12,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:12,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 02:59:12,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-28 02:59:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836945292] [2020-11-28 02:59:12,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539040739] [2020-11-28 02:59:12,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:12,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-28 02:59:12,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683868514] [2020-11-28 02:59:12,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:59:12,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:59:12,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:59:12,301 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 10 states. [2020-11-28 02:59:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:12,344 INFO L93 Difference]: Finished difference Result 184 states and 205 transitions. [2020-11-28 02:59:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:59:12,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 142 [2020-11-28 02:59:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:12,346 INFO L225 Difference]: With dead ends: 184 [2020-11-28 02:59:12,346 INFO L226 Difference]: Without dead ends: 146 [2020-11-28 02:59:12,347 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 [2020-11-28 02:59:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-28 02:59:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-11-28 02:59:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 02:59:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-11-28 02:59:12,355 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 142 [2020-11-28 02:59:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:12,355 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-11-28 02:59:12,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:59:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-11-28 02:59:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-28 02:59:12,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:12,357 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] [2020-11-28 02:59:12,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-28 02:59:12,562 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1571171939, now seen corresponding path program 19 times [2020-11-28 02:59:12,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:12,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089478141] [2020-11-28 02:59:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:12,575 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:12,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220634582] [2020-11-28 02:59:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:12,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:59:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-28 02:59:12,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089478141] [2020-11-28 02:59:12,891 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:12,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220634582] [2020-11-28 02:59:12,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:12,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-28 02:59:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925636213] [2020-11-28 02:59:12,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:59:12,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:12,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:59:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:59:12,894 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 11 states. [2020-11-28 02:59:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:12,978 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-11-28 02:59:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 02:59:12,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-11-28 02:59:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:12,980 INFO L225 Difference]: With dead ends: 185 [2020-11-28 02:59:12,980 INFO L226 Difference]: Without dead ends: 147 [2020-11-28 02:59:12,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:59:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-28 02:59:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-11-28 02:59:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-28 02:59:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2020-11-28 02:59:12,994 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 144 [2020-11-28 02:59:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:12,995 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2020-11-28 02:59:12,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:59:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2020-11-28 02:59:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-28 02:59:12,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:12,997 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] [2020-11-28 02:59:13,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:13,222 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash -676592603, now seen corresponding path program 20 times [2020-11-28 02:59:13,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:13,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869146367] [2020-11-28 02:59:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:13,241 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:13,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996180405] [2020-11-28 02:59:13,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/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 [2020-11-28 02:59:13,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:59:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-28 02:59:13,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:59:14,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:14,498 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:59:14,498 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:59:14,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-28 02:59:14,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:59:14 BoogieIcfgContainer [2020-11-28 02:59:14,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:59:14,877 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:59:14,877 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:59:14,877 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:59:14,878 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:50" (3/4) ... [2020-11-28 02:59:14,880 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:59:15,046 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_14f4b55c-8180-4e03-9e3b-f5804eb7505a/bin/uautomizer/witness.graphml [2020-11-28 02:59:15,046 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:59:15,048 INFO L168 Benchmark]: Toolchain (without parser) took 25258.02 ms. Allocated memory was 88.1 MB in the beginning and 243.3 MB in the end (delta: 155.2 MB). Free memory was 57.5 MB in the beginning and 147.9 MB in the end (delta: -90.4 MB). Peak memory consumption was 64.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:15,049 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 88.1 MB. Free memory is still 45.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:59:15,049 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.58 ms. Allocated memory is still 88.1 MB. Free memory was 57.3 MB in the beginning and 65.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:15,050 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.49 ms. Allocated memory is still 88.1 MB. Free memory was 65.8 MB in the beginning and 64.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:15,050 INFO L168 Benchmark]: Boogie Preprocessor took 37.35 ms. Allocated memory is still 88.1 MB. Free memory was 64.1 MB in the beginning and 62.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:15,051 INFO L168 Benchmark]: RCFGBuilder took 630.61 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 43.8 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:15,051 INFO L168 Benchmark]: TraceAbstraction took 24039.80 ms. Allocated memory was 88.1 MB in the beginning and 243.3 MB in the end (delta: 155.2 MB). Free memory was 43.5 MB in the beginning and 159.4 MB in the end (delta: -115.9 MB). Peak memory consumption was 40.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:15,052 INFO L168 Benchmark]: Witness Printer took 169.41 ms. Allocated memory is still 243.3 MB. Free memory was 159.4 MB in the beginning and 147.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:15,054 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 88.1 MB. Free memory is still 45.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.58 ms. Allocated memory is still 88.1 MB. Free memory was 57.3 MB in the beginning and 65.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.49 ms. Allocated memory is still 88.1 MB. Free memory was 65.8 MB in the beginning and 64.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.35 ms. Allocated memory is still 88.1 MB. Free memory was 64.1 MB in the beginning and 62.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 630.61 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 43.8 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24039.80 ms. Allocated memory was 88.1 MB in the beginning and 243.3 MB in the end (delta: 155.2 MB). Free memory was 43.5 MB in the beginning and 159.4 MB in the end (delta: -115.9 MB). Peak memory consumption was 40.4 MB. Max. memory is 16.1 GB. * Witness Printer took 169.41 ms. Allocated memory is still 243.3 MB. Free memory was 159.4 MB in the beginning and 147.9 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: 23.7s, OverallIterations: 33, TraceHistogramMax: 10, AutomataDifference: 3.2s, 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, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2349 GetRequests, 2185 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.8s 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: 0.8s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 3.0s 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...