./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95fd85f45b093ce7164d10dc9660c11119aaa9b2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-cad4683 [2019-11-15 21:12:15,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:12:15,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:12:15,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:12:15,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:12:15,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:12:15,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:12:15,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:12:15,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:12:15,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:12:15,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:12:15,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:12:15,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:12:15,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:12:15,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:12:15,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:12:15,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:12:15,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:12:15,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:12:15,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:12:15,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:12:15,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:12:15,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:12:15,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:12:15,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:12:15,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:12:15,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:12:15,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:12:15,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:12:15,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:12:15,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:12:15,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:12:15,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:12:15,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:12:15,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:12:15,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:12:15,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:12:15,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:12:15,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:12:15,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:12:15,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:12:15,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 21:12:15,276 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:12:15,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:12:15,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:12:15,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:12:15,290 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:12:15,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:12:15,290 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:12:15,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:12:15,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:12:15,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:12:15,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:12:15,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:12:15,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:12:15,293 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:12:15,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:12:15,293 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:12:15,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:12:15,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:12:15,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:12:15,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:12:15,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:12:15,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:12:15,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:12:15,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:12:15,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:12:15,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:12:15,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 21:12:15,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:12:15,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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(__VERIFIER_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 -> 95fd85f45b093ce7164d10dc9660c11119aaa9b2 [2019-11-15 21:12:15,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:12:15,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:12:15,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:12:15,361 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:12:15,362 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:12:15,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/../../sv-benchmarks/c/loops/eureka_01-1.c [2019-11-15 21:12:15,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/data/b79cd6b3b/2b7983dd34f3421c9dbd243d913494cc/FLAGaf4b60299 [2019-11-15 21:12:15,930 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:12:15,931 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/sv-benchmarks/c/loops/eureka_01-1.c [2019-11-15 21:12:15,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/data/b79cd6b3b/2b7983dd34f3421c9dbd243d913494cc/FLAGaf4b60299 [2019-11-15 21:12:16,280 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/data/b79cd6b3b/2b7983dd34f3421c9dbd243d913494cc [2019-11-15 21:12:16,283 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:12:16,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:12:16,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:12:16,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:12:16,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:12:16,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668f3393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16, skipping insertion in model container [2019-11-15 21:12:16,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,302 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:12:16,323 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:12:16,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:12:16,582 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:12:16,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:12:16,661 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:12:16,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16 WrapperNode [2019-11-15 21:12:16,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:12:16,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:12:16,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:12:16,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:12:16,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:12:16,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:12:16,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:12:16,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:12:16,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... [2019-11-15 21:12:16,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:12:16,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:12:16,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:12:16,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:12:16,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 21:12:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:12:16,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:12:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 21:12:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-15 21:12:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 21:12:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 21:12:17,280 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:12:17,280 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-15 21:12:17,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:12:17 BoogieIcfgContainer [2019-11-15 21:12:17,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:12:17,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:12:17,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:12:17,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:12:17,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:12:16" (1/3) ... [2019-11-15 21:12:17,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752bec38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:12:17, skipping insertion in model container [2019-11-15 21:12:17,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:12:16" (2/3) ... [2019-11-15 21:12:17,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752bec38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:12:17, skipping insertion in model container [2019-11-15 21:12:17,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:12:17" (3/3) ... [2019-11-15 21:12:17,291 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2019-11-15 21:12:17,318 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:12:17,330 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:12:17,348 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:12:17,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:12:17,383 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:12:17,383 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:12:17,384 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:12:17,384 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:12:17,384 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:12:17,384 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:12:17,384 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:12:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-15 21:12:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-15 21:12:17,414 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:17,415 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:17,419 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2019-11-15 21:12:17,437 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:17,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675056587] [2019-11-15 21:12:17,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:17,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:17,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:12:17,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675056587] [2019-11-15 21:12:17,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:12:17,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 21:12:17,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448062543] [2019-11-15 21:12:17,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:12:17,806 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:12:17,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:12:17,822 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-15 21:12:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:18,020 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2019-11-15 21:12:18,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:12:18,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-15 21:12:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:18,034 INFO L225 Difference]: With dead ends: 89 [2019-11-15 21:12:18,034 INFO L226 Difference]: Without dead ends: 42 [2019-11-15 21:12:18,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:12:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-15 21:12:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2019-11-15 21:12:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 21:12:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-15 21:12:18,115 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2019-11-15 21:12:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:18,116 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-15 21:12:18,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:12:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-15 21:12:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 21:12:18,117 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:18,117 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:18,118 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:18,118 INFO L82 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2019-11-15 21:12:18,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:18,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534269065] [2019-11-15 21:12:18,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:18,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:18,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:12:18,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534269065] [2019-11-15 21:12:18,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093447425] [2019-11-15 21:12:18,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:18,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-15 21:12:18,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:18,794 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-15 21:12:18,794 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:18,805 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:18,806 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:18,806 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-15 21:12:18,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:18,872 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:18,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2019-11-15 21:12:18,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518350104] [2019-11-15 21:12:18,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 21:12:18,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 21:12:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-15 21:12:18,876 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 11 states. [2019-11-15 21:12:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:19,574 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2019-11-15 21:12:19,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 21:12:19,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-15 21:12:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:19,579 INFO L225 Difference]: With dead ends: 124 [2019-11-15 21:12:19,581 INFO L226 Difference]: Without dead ends: 122 [2019-11-15 21:12:19,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-15 21:12:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-15 21:12:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 43. [2019-11-15 21:12:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-15 21:12:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-11-15 21:12:19,616 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2019-11-15 21:12:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:19,618 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-11-15 21:12:19,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 21:12:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-11-15 21:12:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 21:12:19,626 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:19,627 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:19,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:19,844 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:19,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:19,845 INFO L82 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2019-11-15 21:12:19,845 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:19,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082581951] [2019-11-15 21:12:19,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:19,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:19,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:19,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082581951] [2019-11-15 21:12:19,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:12:19,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 21:12:19,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008082873] [2019-11-15 21:12:19,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 21:12:19,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 21:12:19,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 21:12:19,907 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 3 states. [2019-11-15 21:12:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:19,957 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-11-15 21:12:19,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 21:12:19,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-15 21:12:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:19,959 INFO L225 Difference]: With dead ends: 66 [2019-11-15 21:12:19,959 INFO L226 Difference]: Without dead ends: 45 [2019-11-15 21:12:19,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 21:12:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-15 21:12:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-15 21:12:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-15 21:12:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2019-11-15 21:12:19,969 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2019-11-15 21:12:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:19,970 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2019-11-15 21:12:19,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 21:12:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2019-11-15 21:12:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 21:12:19,972 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:19,972 INFO L380 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] [2019-11-15 21:12:19,972 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2019-11-15 21:12:19,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:19,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392379010] [2019-11-15 21:12:19,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:19,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:19,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:20,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392379010] [2019-11-15 21:12:20,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647329996] [2019-11-15 21:12:20,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:20,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 21:12:20,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:20,240 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:20,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-15 21:12:20,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075334693] [2019-11-15 21:12:20,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 21:12:20,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 21:12:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:12:20,242 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 8 states. [2019-11-15 21:12:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:20,383 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2019-11-15 21:12:20,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 21:12:20,384 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-15 21:12:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:20,386 INFO L225 Difference]: With dead ends: 114 [2019-11-15 21:12:20,386 INFO L226 Difference]: Without dead ends: 86 [2019-11-15 21:12:20,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:12:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-15 21:12:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2019-11-15 21:12:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 21:12:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2019-11-15 21:12:20,399 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2019-11-15 21:12:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:20,400 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2019-11-15 21:12:20,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 21:12:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2019-11-15 21:12:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 21:12:20,401 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:20,402 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:20,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:20,606 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2019-11-15 21:12:20,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:20,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848348620] [2019-11-15 21:12:20,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:20,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:20,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:12:20,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848348620] [2019-11-15 21:12:20,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721928488] [2019-11-15 21:12:20,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:20,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 21:12:20,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:12:20,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:20,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-15 21:12:20,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209893243] [2019-11-15 21:12:20,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 21:12:20,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:12:20,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:12:20,873 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 10 states. [2019-11-15 21:12:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:21,137 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2019-11-15 21:12:21,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 21:12:21,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-15 21:12:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:21,140 INFO L225 Difference]: With dead ends: 181 [2019-11-15 21:12:21,140 INFO L226 Difference]: Without dead ends: 159 [2019-11-15 21:12:21,141 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-15 21:12:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-15 21:12:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2019-11-15 21:12:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-15 21:12:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2019-11-15 21:12:21,159 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2019-11-15 21:12:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:21,159 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2019-11-15 21:12:21,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 21:12:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2019-11-15 21:12:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 21:12:21,161 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:21,162 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:21,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:21,369 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1234267636, now seen corresponding path program 1 times [2019-11-15 21:12:21,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:21,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099077341] [2019-11-15 21:12:21,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:21,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:21,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:21,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099077341] [2019-11-15 21:12:21,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231157355] [2019-11-15 21:12:21,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:21,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 21:12:21,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:21,621 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:21,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-15 21:12:21,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57911237] [2019-11-15 21:12:21,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 21:12:21,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:12:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:12:21,627 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand 10 states. [2019-11-15 21:12:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:21,832 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2019-11-15 21:12:21,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 21:12:21,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-15 21:12:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:21,834 INFO L225 Difference]: With dead ends: 206 [2019-11-15 21:12:21,834 INFO L226 Difference]: Without dead ends: 146 [2019-11-15 21:12:21,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-15 21:12:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-15 21:12:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2019-11-15 21:12:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-15 21:12:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2019-11-15 21:12:21,858 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2019-11-15 21:12:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:21,859 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2019-11-15 21:12:21,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 21:12:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2019-11-15 21:12:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 21:12:21,861 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:21,861 INFO L380 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] [2019-11-15 21:12:22,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:22,072 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2019-11-15 21:12:22,073 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:22,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121437514] [2019-11-15 21:12:22,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:22,074 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:22,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:22,739 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2019-11-15 21:12:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:12:23,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121437514] [2019-11-15 21:12:23,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080279995] [2019-11-15 21:12:23,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:23,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-15 21:12:23,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:23,232 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:23,233 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2019-11-15 21:12:23,233 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:23,249 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:23,249 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:23,250 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:21 [2019-11-15 21:12:23,291 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-15 21:12:23,291 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:23,320 INFO L567 ElimStorePlain]: treesize reduction 4, result has 84.0 percent of original size [2019-11-15 21:12:23,320 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:23,320 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:21 [2019-11-15 21:12:23,478 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:23,478 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 99 [2019-11-15 21:12:23,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:23,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:23,481 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:23,542 INFO L567 ElimStorePlain]: treesize reduction 63, result has 37.0 percent of original size [2019-11-15 21:12:23,543 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 21:12:23,543 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:36 [2019-11-15 21:12:23,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:23,762 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:23,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2019-11-15 21:12:23,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672425975] [2019-11-15 21:12:23,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-15 21:12:23,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-15 21:12:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2019-11-15 21:12:23,765 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 23 states. [2019-11-15 21:12:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:27,096 INFO L93 Difference]: Finished difference Result 256 states and 313 transitions. [2019-11-15 21:12:27,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-15 21:12:27,097 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-11-15 21:12:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:27,098 INFO L225 Difference]: With dead ends: 256 [2019-11-15 21:12:27,099 INFO L226 Difference]: Without dead ends: 232 [2019-11-15 21:12:27,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=706, Invalid=3454, Unknown=0, NotChecked=0, Total=4160 [2019-11-15 21:12:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-11-15 21:12:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 96. [2019-11-15 21:12:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-15 21:12:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2019-11-15 21:12:27,119 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2019-11-15 21:12:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:27,120 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2019-11-15 21:12:27,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-15 21:12:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2019-11-15 21:12:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 21:12:27,122 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:27,122 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:27,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:27,325 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:27,326 INFO L82 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2019-11-15 21:12:27,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:27,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587889569] [2019-11-15 21:12:27,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:27,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:27,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:12:27,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587889569] [2019-11-15 21:12:27,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340521427] [2019-11-15 21:12:27,502 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:27,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:12:27,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:12:27,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 21:12:27,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:27,614 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-15 21:12:27,615 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:27,624 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:27,625 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:27,625 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-15 21:12:27,682 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:27,683 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-11-15 21:12:27,683 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:27,696 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:27,697 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:27,697 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2019-11-15 21:12:27,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:12:27,740 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:27,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2019-11-15 21:12:27,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679486934] [2019-11-15 21:12:27,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 21:12:27,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:27,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 21:12:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-15 21:12:27,742 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 11 states. [2019-11-15 21:12:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:28,163 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2019-11-15 21:12:28,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 21:12:28,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-15 21:12:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:28,165 INFO L225 Difference]: With dead ends: 205 [2019-11-15 21:12:28,165 INFO L226 Difference]: Without dead ends: 137 [2019-11-15 21:12:28,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-11-15 21:12:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-15 21:12:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2019-11-15 21:12:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-15 21:12:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2019-11-15 21:12:28,189 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 25 [2019-11-15 21:12:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:28,190 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2019-11-15 21:12:28,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 21:12:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2019-11-15 21:12:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-15 21:12:28,199 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:28,199 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-11-15 21:12:28,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:28,407 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2019-11-15 21:12:28,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:28,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634865173] [2019-11-15 21:12:28,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:28,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:28,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:28,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634865173] [2019-11-15 21:12:28,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153944502] [2019-11-15 21:12:28,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:28,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:12:28,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:12:28,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 21:12:28,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:28,622 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:28,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-15 21:12:28,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319630646] [2019-11-15 21:12:28,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 21:12:28,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:12:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:12:28,624 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand 10 states. [2019-11-15 21:12:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:28,923 INFO L93 Difference]: Finished difference Result 202 states and 251 transitions. [2019-11-15 21:12:28,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 21:12:28,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-15 21:12:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:28,925 INFO L225 Difference]: With dead ends: 202 [2019-11-15 21:12:28,925 INFO L226 Difference]: Without dead ends: 189 [2019-11-15 21:12:28,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-11-15 21:12:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-15 21:12:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 131. [2019-11-15 21:12:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-15 21:12:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 171 transitions. [2019-11-15 21:12:28,947 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 171 transitions. Word has length 28 [2019-11-15 21:12:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:28,948 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 171 transitions. [2019-11-15 21:12:28,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 21:12:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 171 transitions. [2019-11-15 21:12:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 21:12:28,952 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:28,952 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:29,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:29,164 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash 583416536, now seen corresponding path program 1 times [2019-11-15 21:12:29,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:29,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090164824] [2019-11-15 21:12:29,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:29,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:29,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:12:29,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090164824] [2019-11-15 21:12:29,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77113508] [2019-11-15 21:12:29,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:29,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-15 21:12:29,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:29,603 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-15 21:12:29,604 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:29,615 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:29,616 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:29,616 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-11-15 21:12:29,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:12:29,675 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:29,675 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2019-11-15 21:12:29,675 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858568675] [2019-11-15 21:12:29,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 21:12:29,676 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:29,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 21:12:29,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:12:29,677 INFO L87 Difference]: Start difference. First operand 131 states and 171 transitions. Second operand 13 states. [2019-11-15 21:12:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:30,352 INFO L93 Difference]: Finished difference Result 304 states and 397 transitions. [2019-11-15 21:12:30,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 21:12:30,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-15 21:12:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:30,355 INFO L225 Difference]: With dead ends: 304 [2019-11-15 21:12:30,355 INFO L226 Difference]: Without dead ends: 302 [2019-11-15 21:12:30,358 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2019-11-15 21:12:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-11-15 21:12:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 225. [2019-11-15 21:12:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-11-15 21:12:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 298 transitions. [2019-11-15 21:12:30,383 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 298 transitions. Word has length 29 [2019-11-15 21:12:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:30,384 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 298 transitions. [2019-11-15 21:12:30,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 21:12:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 298 transitions. [2019-11-15 21:12:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 21:12:30,388 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:30,388 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-11-15 21:12:30,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:30,599 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:30,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2019-11-15 21:12:30,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:30,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337048290] [2019-11-15 21:12:30,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:30,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:30,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:30,968 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2019-11-15 21:12:31,131 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2019-11-15 21:12:31,317 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2019-11-15 21:12:31,490 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2019-11-15 21:12:31,649 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2019-11-15 21:12:31,806 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2019-11-15 21:12:31,989 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 53 [2019-11-15 21:12:32,132 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 39 [2019-11-15 21:12:32,259 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2019-11-15 21:12:32,410 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2019-11-15 21:12:32,594 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2019-11-15 21:12:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:33,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337048290] [2019-11-15 21:12:33,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890879602] [2019-11-15 21:12:33,034 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:33,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 21:12:33,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:12:33,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-15 21:12:33,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:33,157 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:33,157 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2019-11-15 21:12:33,158 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:33,183 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:33,184 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:33,184 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:39 [2019-11-15 21:12:33,241 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:33,243 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:33,244 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:33,245 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2019-11-15 21:12:33,246 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:33,286 INFO L567 ElimStorePlain]: treesize reduction 4, result has 90.7 percent of original size [2019-11-15 21:12:33,287 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:33,287 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2019-11-15 21:12:33,481 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 21:12:33,482 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:33,483 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:33,484 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:33,690 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2019-11-15 21:12:33,691 INFO L341 Elim1Store]: treesize reduction 8, result has 96.7 percent of original size [2019-11-15 21:12:33,691 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 257 [2019-11-15 21:12:33,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:33,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:33,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:33,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:33,695 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:33,761 INFO L567 ElimStorePlain]: treesize reduction 191, result has 26.3 percent of original size [2019-11-15 21:12:33,762 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 21:12:33,762 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:68 [2019-11-15 21:12:34,086 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-11-15 21:12:34,086 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:34,086 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 298 [2019-11-15 21:12:34,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:34,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:34,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:34,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:34,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:34,093 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:34,187 INFO L567 ElimStorePlain]: treesize reduction 209, result has 24.8 percent of original size [2019-11-15 21:12:34,188 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-15 21:12:34,189 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:68 [2019-11-15 21:12:34,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:34,464 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:34,465 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2019-11-15 21:12:34,465 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011756195] [2019-11-15 21:12:34,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-15 21:12:34,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-15 21:12:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2019-11-15 21:12:34,467 INFO L87 Difference]: Start difference. First operand 225 states and 298 transitions. Second operand 29 states. [2019-11-15 21:12:35,057 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2019-11-15 21:12:36,263 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2019-11-15 21:12:40,613 WARN L191 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2019-11-15 21:12:40,816 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2019-11-15 21:12:41,405 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-11-15 21:12:42,286 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2019-11-15 21:12:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:42,408 INFO L93 Difference]: Finished difference Result 281 states and 362 transitions. [2019-11-15 21:12:42,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-15 21:12:42,409 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2019-11-15 21:12:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:42,411 INFO L225 Difference]: With dead ends: 281 [2019-11-15 21:12:42,411 INFO L226 Difference]: Without dead ends: 245 [2019-11-15 21:12:42,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2019-11-15 21:12:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-11-15 21:12:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 228. [2019-11-15 21:12:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-11-15 21:12:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 302 transitions. [2019-11-15 21:12:42,436 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 302 transitions. Word has length 31 [2019-11-15 21:12:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:42,437 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 302 transitions. [2019-11-15 21:12:42,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-15 21:12:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 302 transitions. [2019-11-15 21:12:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 21:12:42,438 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:42,438 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-11-15 21:12:42,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:42,643 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2019-11-15 21:12:42,644 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:42,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346311351] [2019-11-15 21:12:42,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:42,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:42,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 21:12:42,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346311351] [2019-11-15 21:12:42,693 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:12:42,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 21:12:42,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955488024] [2019-11-15 21:12:42,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:12:42,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:42,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:12:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:12:42,694 INFO L87 Difference]: Start difference. First operand 228 states and 302 transitions. Second operand 5 states. [2019-11-15 21:12:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:42,756 INFO L93 Difference]: Finished difference Result 368 states and 480 transitions. [2019-11-15 21:12:42,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:12:42,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-15 21:12:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:42,759 INFO L225 Difference]: With dead ends: 368 [2019-11-15 21:12:42,760 INFO L226 Difference]: Without dead ends: 266 [2019-11-15 21:12:42,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:12:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-11-15 21:12:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 228. [2019-11-15 21:12:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-11-15 21:12:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2019-11-15 21:12:42,785 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 31 [2019-11-15 21:12:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:42,786 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2019-11-15 21:12:42,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:12:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2019-11-15 21:12:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 21:12:42,787 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:42,787 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:42,787 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash 651964356, now seen corresponding path program 3 times [2019-11-15 21:12:42,788 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:42,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651779531] [2019-11-15 21:12:42,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:42,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:42,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 21:12:42,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651779531] [2019-11-15 21:12:42,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084800615] [2019-11-15 21:12:42,863 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:42,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 21:12:42,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:12:42,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-15 21:12:42,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:42,990 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-15 21:12:42,990 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:42,998 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:42,998 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:42,999 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-15 21:12:43,080 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:43,081 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-11-15 21:12:43,082 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:43,095 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:43,096 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:43,096 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:23 [2019-11-15 21:12:43,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 21:12:43,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:43,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16] total 19 [2019-11-15 21:12:43,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397619553] [2019-11-15 21:12:43,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 21:12:43,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 21:12:43,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-15 21:12:43,543 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand 19 states. [2019-11-15 21:12:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:45,179 INFO L93 Difference]: Finished difference Result 516 states and 658 transitions. [2019-11-15 21:12:45,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-15 21:12:45,180 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2019-11-15 21:12:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:45,183 INFO L225 Difference]: With dead ends: 516 [2019-11-15 21:12:45,183 INFO L226 Difference]: Without dead ends: 420 [2019-11-15 21:12:45,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 21:12:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-11-15 21:12:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 121. [2019-11-15 21:12:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-15 21:12:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2019-11-15 21:12:45,206 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2019-11-15 21:12:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:45,207 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2019-11-15 21:12:45,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 21:12:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2019-11-15 21:12:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 21:12:45,209 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:45,209 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:45,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:45,412 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1777758610, now seen corresponding path program 2 times [2019-11-15 21:12:45,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:45,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129034114] [2019-11-15 21:12:45,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:45,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:45,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:12:45,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129034114] [2019-11-15 21:12:45,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434635390] [2019-11-15 21:12:45,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:45,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:12:45,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:12:45,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 21:12:45,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:12:45,638 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:45,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-15 21:12:45,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548027502] [2019-11-15 21:12:45,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 21:12:45,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:45,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 21:12:45,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:12:45,639 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand 13 states. [2019-11-15 21:12:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:45,946 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2019-11-15 21:12:45,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 21:12:45,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-15 21:12:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:45,950 INFO L225 Difference]: With dead ends: 403 [2019-11-15 21:12:45,950 INFO L226 Difference]: Without dead ends: 298 [2019-11-15 21:12:45,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-15 21:12:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-11-15 21:12:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2019-11-15 21:12:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-15 21:12:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2019-11-15 21:12:45,977 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2019-11-15 21:12:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:45,978 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2019-11-15 21:12:45,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 21:12:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2019-11-15 21:12:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-15 21:12:45,979 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:45,979 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:46,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:46,183 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2019-11-15 21:12:46,184 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:46,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880747369] [2019-11-15 21:12:46,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:46,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:46,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:46,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880747369] [2019-11-15 21:12:46,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109269530] [2019-11-15 21:12:46,288 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:46,371 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 21:12:46,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:12:46,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 21:12:46,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:46,426 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:46,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-15 21:12:46,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858742963] [2019-11-15 21:12:46,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 21:12:46,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 21:12:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:12:46,427 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 13 states. [2019-11-15 21:12:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:12:46,876 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2019-11-15 21:12:46,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 21:12:46,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-11-15 21:12:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:12:46,879 INFO L225 Difference]: With dead ends: 487 [2019-11-15 21:12:46,880 INFO L226 Difference]: Without dead ends: 465 [2019-11-15 21:12:46,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2019-11-15 21:12:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2019-11-15 21:12:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2019-11-15 21:12:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2019-11-15 21:12:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2019-11-15 21:12:46,925 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2019-11-15 21:12:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:12:46,926 INFO L462 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2019-11-15 21:12:46,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 21:12:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2019-11-15 21:12:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-15 21:12:46,927 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:12:46,927 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:12:47,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:12:47,132 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:12:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:12:47,132 INFO L82 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2019-11-15 21:12:47,132 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:12:47,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245558988] [2019-11-15 21:12:47,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:47,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:12:47,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:12:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:12:47,622 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2019-11-15 21:12:47,747 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2019-11-15 21:12:48,127 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 40 [2019-11-15 21:12:48,368 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 76 [2019-11-15 21:12:48,650 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 68 [2019-11-15 21:12:48,820 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2019-11-15 21:12:48,978 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2019-11-15 21:12:49,176 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 60 [2019-11-15 21:12:49,374 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 43 [2019-11-15 21:12:49,538 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2019-11-15 21:12:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:12:50,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245558988] [2019-11-15 21:12:50,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139459058] [2019-11-15 21:12:50,044 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:12:50,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:12:50,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:12:50,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-15 21:12:50,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:12:50,150 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:50,151 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2019-11-15 21:12:50,151 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,168 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:50,168 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,169 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:24 [2019-11-15 21:12:50,220 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-15 21:12:50,220 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,264 INFO L567 ElimStorePlain]: treesize reduction 4, result has 88.6 percent of original size [2019-11-15 21:12:50,264 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,264 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:31 [2019-11-15 21:12:50,459 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:50,465 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:50,465 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 38 [2019-11-15 21:12:50,466 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,496 INFO L567 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2019-11-15 21:12:50,496 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,496 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2019-11-15 21:12:50,755 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:50,755 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 83 [2019-11-15 21:12:50,759 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,813 INFO L567 ElimStorePlain]: treesize reduction 52, result has 38.1 percent of original size [2019-11-15 21:12:50,813 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:12:50,813 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:32 [2019-11-15 21:12:50,954 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:12:50,994 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:12:50,994 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 119 [2019-11-15 21:12:50,996 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:12:51,021 INFO L567 ElimStorePlain]: treesize reduction 52, result has 35.8 percent of original size [2019-11-15 21:12:51,022 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 21:12:51,022 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2019-11-15 21:12:51,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:12:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:12:51,167 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:12:51,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 33 [2019-11-15 21:12:51,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510453323] [2019-11-15 21:12:51,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-15 21:12:51,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:12:51,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-15 21:12:51,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 21:12:51,169 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand 33 states. [2019-11-15 21:12:51,449 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-15 21:12:51,617 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2019-11-15 21:12:52,008 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2019-11-15 21:12:52,173 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 53 [2019-11-15 21:12:52,406 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 52 [2019-11-15 21:12:52,596 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 48 [2019-11-15 21:12:52,925 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2019-11-15 21:12:53,101 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2019-11-15 21:12:53,553 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2019-11-15 21:12:53,718 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2019-11-15 21:12:53,877 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2019-11-15 21:12:54,073 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 50 [2019-11-15 21:12:54,381 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2019-11-15 21:12:54,563 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2019-11-15 21:12:54,737 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2019-11-15 21:12:55,080 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2019-11-15 21:12:55,262 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2019-11-15 21:12:55,435 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2019-11-15 21:12:55,603 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2019-11-15 21:12:55,740 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2019-11-15 21:12:55,946 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2019-11-15 21:12:56,132 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2019-11-15 21:12:56,288 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2019-11-15 21:12:56,469 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 65 [2019-11-15 21:12:56,623 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2019-11-15 21:12:56,788 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 61 [2019-11-15 21:12:57,049 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 71 [2019-11-15 21:12:57,225 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2019-11-15 21:12:57,424 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 67 [2019-11-15 21:12:57,637 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2019-11-15 21:12:58,344 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2019-11-15 21:12:58,513 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 60 [2019-11-15 21:12:58,694 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2019-11-15 21:12:58,857 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2019-11-15 21:12:59,057 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2019-11-15 21:12:59,228 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2019-11-15 21:12:59,562 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2019-11-15 21:12:59,780 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2019-11-15 21:12:59,960 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2019-11-15 21:13:00,141 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2019-11-15 21:13:00,345 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2019-11-15 21:13:00,531 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2019-11-15 21:13:00,743 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2019-11-15 21:13:01,045 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 58 [2019-11-15 21:13:01,215 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2019-11-15 21:13:01,392 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2019-11-15 21:13:01,791 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2019-11-15 21:13:02,072 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2019-11-15 21:13:02,392 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2019-11-15 21:13:02,935 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2019-11-15 21:13:03,229 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2019-11-15 21:13:03,389 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2019-11-15 21:13:03,543 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2019-11-15 21:13:03,831 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2019-11-15 21:13:04,033 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2019-11-15 21:13:04,289 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2019-11-15 21:13:04,510 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2019-11-15 21:13:04,665 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2019-11-15 21:13:04,808 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2019-11-15 21:13:05,248 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2019-11-15 21:13:05,513 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2019-11-15 21:13:05,767 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2019-11-15 21:13:05,936 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 63 [2019-11-15 21:13:06,080 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 54 [2019-11-15 21:13:06,707 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2019-11-15 21:13:07,036 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 64 [2019-11-15 21:13:07,229 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2019-11-15 21:13:07,440 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2019-11-15 21:13:07,646 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2019-11-15 21:13:07,810 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2019-11-15 21:13:08,012 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2019-11-15 21:13:08,167 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2019-11-15 21:13:08,381 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2019-11-15 21:13:08,716 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2019-11-15 21:13:09,005 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2019-11-15 21:13:09,182 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2019-11-15 21:13:09,321 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2019-11-15 21:13:09,488 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2019-11-15 21:13:09,648 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2019-11-15 21:13:09,871 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2019-11-15 21:13:10,029 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2019-11-15 21:13:10,211 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2019-11-15 21:13:10,384 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2019-11-15 21:13:10,558 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2019-11-15 21:13:10,746 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2019-11-15 21:13:10,938 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2019-11-15 21:13:11,269 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2019-11-15 21:13:11,737 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2019-11-15 21:13:11,896 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2019-11-15 21:13:12,070 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2019-11-15 21:13:12,236 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2019-11-15 21:13:12,536 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2019-11-15 21:13:12,700 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2019-11-15 21:13:12,853 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2019-11-15 21:13:13,625 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2019-11-15 21:13:14,126 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2019-11-15 21:13:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:13:14,348 INFO L93 Difference]: Finished difference Result 954 states and 1189 transitions. [2019-11-15 21:13:14,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2019-11-15 21:13:14,348 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 34 [2019-11-15 21:13:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:13:14,354 INFO L225 Difference]: With dead ends: 954 [2019-11-15 21:13:14,354 INFO L226 Difference]: Without dead ends: 952 [2019-11-15 21:13:14,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9877 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=3720, Invalid=24002, Unknown=0, NotChecked=0, Total=27722 [2019-11-15 21:13:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2019-11-15 21:13:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 469. [2019-11-15 21:13:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-11-15 21:13:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 630 transitions. [2019-11-15 21:13:14,438 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 630 transitions. Word has length 34 [2019-11-15 21:13:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:13:14,438 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 630 transitions. [2019-11-15 21:13:14,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-15 21:13:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 630 transitions. [2019-11-15 21:13:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 21:13:14,440 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:13:14,440 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:13:14,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:13:14,648 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:13:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:13:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2019-11-15 21:13:14,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:13:14,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172310302] [2019-11-15 21:13:14,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:13:14,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:13:14,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:13:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:13:15,041 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-11-15 21:13:15,170 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2019-11-15 21:13:15,304 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2019-11-15 21:13:15,648 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 54 [2019-11-15 21:13:15,838 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 63 [2019-11-15 21:13:15,974 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 48 [2019-11-15 21:13:16,113 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2019-11-15 21:13:16,259 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 55 [2019-11-15 21:13:16,397 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2019-11-15 21:13:16,537 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2019-11-15 21:13:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:13:17,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172310302] [2019-11-15 21:13:17,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473274735] [2019-11-15 21:13:17,710 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:13:17,887 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-15 21:13:17,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:13:17,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-15 21:13:17,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:13:17,911 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:13:17,911 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2019-11-15 21:13:17,911 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:13:17,930 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:13:17,931 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:13:17,931 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:39 [2019-11-15 21:13:17,982 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:17,983 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:17,983 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:17,987 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2019-11-15 21:13:17,988 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:13:18,010 INFO L567 ElimStorePlain]: treesize reduction 4, result has 90.7 percent of original size [2019-11-15 21:13:18,010 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:13:18,011 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2019-11-15 21:13:18,167 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 21:13:18,168 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:18,169 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:18,170 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:18,388 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2019-11-15 21:13:18,388 INFO L341 Elim1Store]: treesize reduction 8, result has 96.7 percent of original size [2019-11-15 21:13:18,388 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 257 [2019-11-15 21:13:18,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,392 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:13:18,460 INFO L567 ElimStorePlain]: treesize reduction 225, result has 23.5 percent of original size [2019-11-15 21:13:18,461 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 21:13:18,461 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:68 [2019-11-15 21:13:18,687 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:18,688 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 21:13:18,689 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:18,691 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:18,691 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 21:13:18,693 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:18,881 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-15 21:13:18,881 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:13:18,882 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 421 [2019-11-15 21:13:18,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:18,889 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:13:19,018 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2019-11-15 21:13:19,018 INFO L567 ElimStorePlain]: treesize reduction 416, result has 17.9 percent of original size [2019-11-15 21:13:19,019 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 21:13:19,019 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:90 [2019-11-15 21:13:19,846 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:19,847 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:13:19,848 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 21:13:20,135 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2019-11-15 21:13:20,135 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:13:20,136 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 93 treesize of output 515 [2019-11-15 21:13:20,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:20,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:13:20,283 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 45 [2019-11-15 21:13:20,283 INFO L567 ElimStorePlain]: treesize reduction 396, result has 19.3 percent of original size [2019-11-15 21:13:20,284 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 21:13:20,284 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:99, output treesize:93 [2019-11-15 21:13:32,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:13:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:13:32,522 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:13:32,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 46 [2019-11-15 21:13:32,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831574675] [2019-11-15 21:13:32,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-15 21:13:32,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:13:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-15 21:13:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1868, Unknown=5, NotChecked=0, Total=2070 [2019-11-15 21:13:32,524 INFO L87 Difference]: Start difference. First operand 469 states and 630 transitions. Second operand 46 states. [2019-11-15 21:13:33,529 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2019-11-15 21:13:33,706 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2019-11-15 21:13:34,611 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2019-11-15 21:13:34,800 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2019-11-15 21:13:35,038 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2019-11-15 21:13:35,359 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2019-11-15 21:13:35,569 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2019-11-15 21:13:39,839 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2019-11-15 21:13:40,026 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2019-11-15 21:13:40,252 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2019-11-15 21:13:52,550 WARN L191 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 116 DAG size of output: 77 [2019-11-15 21:13:58,557 WARN L191 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 122 DAG size of output: 85 [2019-11-15 21:14:01,335 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2019-11-15 21:14:07,603 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2019-11-15 21:14:13,881 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2019-11-15 21:14:14,136 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-11-15 21:14:16,394 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 88 [2019-11-15 21:14:16,605 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2019-11-15 21:14:16,791 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2019-11-15 21:14:23,069 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2019-11-15 21:14:23,512 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2019-11-15 21:14:25,938 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2019-11-15 21:14:26,212 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 80 [2019-11-15 21:14:28,397 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2019-11-15 21:14:28,787 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-11-15 21:14:31,464 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2019-11-15 21:14:33,809 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-15 21:14:36,636 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2019-11-15 21:14:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:14:36,797 INFO L93 Difference]: Finished difference Result 544 states and 714 transitions. [2019-11-15 21:14:36,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-15 21:14:36,798 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 37 [2019-11-15 21:14:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:14:36,800 INFO L225 Difference]: With dead ends: 544 [2019-11-15 21:14:36,801 INFO L226 Difference]: Without dead ends: 499 [2019-11-15 21:14:36,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=1653, Invalid=6886, Unknown=17, NotChecked=0, Total=8556 [2019-11-15 21:14:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-11-15 21:14:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 475. [2019-11-15 21:14:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-11-15 21:14:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 637 transitions. [2019-11-15 21:14:36,874 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 637 transitions. Word has length 37 [2019-11-15 21:14:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:14:36,874 INFO L462 AbstractCegarLoop]: Abstraction has 475 states and 637 transitions. [2019-11-15 21:14:36,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-15 21:14:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 637 transitions. [2019-11-15 21:14:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-15 21:14:36,876 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:14:36,876 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:14:37,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:14:37,076 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:14:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:14:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1630806470, now seen corresponding path program 1 times [2019-11-15 21:14:37,077 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:14:37,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403212117] [2019-11-15 21:14:37,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:14:37,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:14:37,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:14:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:14:37,594 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2019-11-15 21:14:37,823 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 35 [2019-11-15 21:14:37,981 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2019-11-15 21:14:38,115 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2019-11-15 21:14:38,269 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2019-11-15 21:14:38,424 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2019-11-15 21:14:38,614 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 58 [2019-11-15 21:14:38,893 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 47 [2019-11-15 21:14:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 21:14:39,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403212117] [2019-11-15 21:14:39,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291775786] [2019-11-15 21:14:39,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/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 [2019-11-15 21:14:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:14:39,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-15 21:14:39,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:14:39,329 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:14:39,336 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:14:39,337 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2019-11-15 21:14:39,337 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,359 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:14:39,360 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,360 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:52 [2019-11-15 21:14:39,432 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:14:39,433 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 66 [2019-11-15 21:14:39,433 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,488 INFO L567 ElimStorePlain]: treesize reduction 44, result has 57.3 percent of original size [2019-11-15 21:14:39,488 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,489 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:59 [2019-11-15 21:14:39,594 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 21:14:39,612 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:14:39,613 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 82 [2019-11-15 21:14:39,613 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,663 INFO L567 ElimStorePlain]: treesize reduction 52, result has 52.7 percent of original size [2019-11-15 21:14:39,664 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,664 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:49 [2019-11-15 21:14:39,871 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 21:14:39,871 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 127 [2019-11-15 21:14:39,872 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,935 INFO L567 ElimStorePlain]: treesize reduction 92, result has 39.5 percent of original size [2019-11-15 21:14:39,936 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 21:14:39,936 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:60 [2019-11-15 21:14:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 21:14:40,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:14:40,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2019-11-15 21:14:40,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429199833] [2019-11-15 21:14:40,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-15 21:14:40,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:14:40,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-15 21:14:40,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2019-11-15 21:14:40,152 INFO L87 Difference]: Start difference. First operand 475 states and 637 transitions. Second operand 25 states. [2019-11-15 21:14:42,921 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2019-11-15 21:14:43,382 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 71 [2019-11-15 21:14:44,671 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2019-11-15 21:14:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:14:45,991 INFO L93 Difference]: Finished difference Result 626 states and 809 transitions. [2019-11-15 21:14:45,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-15 21:14:45,992 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2019-11-15 21:14:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:14:45,994 INFO L225 Difference]: With dead ends: 626 [2019-11-15 21:14:45,995 INFO L226 Difference]: Without dead ends: 542 [2019-11-15 21:14:45,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=832, Invalid=4718, Unknown=0, NotChecked=0, Total=5550 [2019-11-15 21:14:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-11-15 21:14:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 484. [2019-11-15 21:14:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-11-15 21:14:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 643 transitions. [2019-11-15 21:14:46,063 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 643 transitions. Word has length 38 [2019-11-15 21:14:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:14:46,063 INFO L462 AbstractCegarLoop]: Abstraction has 484 states and 643 transitions. [2019-11-15 21:14:46,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-15 21:14:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 643 transitions. [2019-11-15 21:14:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-15 21:14:46,065 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:14:46,065 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:14:46,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:14:46,271 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:14:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:14:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash 670016120, now seen corresponding path program 1 times [2019-11-15 21:14:46,271 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:14:46,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165996414] [2019-11-15 21:14:46,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:14:46,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:14:46,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:14:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:14:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:14:46,443 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:14:46,443 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 21:14:46,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:14:46 BoogieIcfgContainer [2019-11-15 21:14:46,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:14:46,527 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:14:46,527 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:14:46,528 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:14:46,528 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:12:17" (3/4) ... [2019-11-15 21:14:46,532 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 21:14:46,611 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b12f0bb0-9b0d-47a4-8250-7ddb114486c3/bin/uautomizer/witness.graphml [2019-11-15 21:14:46,611 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:14:46,613 INFO L168 Benchmark]: Toolchain (without parser) took 150328.20 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 578.3 MB). Free memory was 950.1 MB in the beginning and 1.4 GB in the end (delta: -407.0 MB). Peak memory consumption was 171.2 MB. Max. memory is 11.5 GB. [2019-11-15 21:14:46,613 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:14:46,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.49 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -150.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-15 21:14:46,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.41 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:14:46,614 INFO L168 Benchmark]: Boogie Preprocessor took 45.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. [2019-11-15 21:14:46,615 INFO L168 Benchmark]: RCFGBuilder took 507.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-15 21:14:46,615 INFO L168 Benchmark]: TraceAbstraction took 149244.03 ms. Allocated memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: 468.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -299.4 MB). Peak memory consumption was 168.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:14:46,616 INFO L168 Benchmark]: Witness Printer took 84.39 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 21:14:46,618 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 376.49 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -150.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 64.41 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 45.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 507.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 149244.03 ms. Allocated memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: 468.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -299.4 MB). Peak memory consumption was 168.8 MB. Max. memory is 11.5 GB. * Witness Printer took 84.39 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] int INFINITY = 899; VAL [INFINITY=899] [L13] int nodecount = __VERIFIER_nondet_int(); [L14] int edgecount = __VERIFIER_nondet_int(); [L15] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) VAL [INFINITY=899] [L16] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L17] int source = 0; [L18] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L19] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L20] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L21] int distance[5]; [L22] int x,y; [L23] int i,j; [L25] i = 0 VAL [INFINITY=899] [L25] COND TRUE i < nodecount VAL [INFINITY=899] [L26] COND TRUE i == source [L27] distance[i] = 0 VAL [INFINITY=899] [L25] i++ VAL [INFINITY=899] [L25] COND TRUE i < nodecount VAL [INFINITY=899] [L26] COND FALSE !(i == source) [L30] distance[i] = INFINITY VAL [INFINITY=899] [L25] i++ VAL [INFINITY=899] [L25] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L34] i = 0 VAL [INFINITY=899] [L34] COND TRUE i < nodecount [L36] j = 0 VAL [INFINITY=899] [L36] COND TRUE j < edgecount [L38] EXPR Dest[j] [L38] x = Dest[j] [L39] EXPR Source[j] [L39] y = Source[j] [L40] EXPR distance[x] [L40] EXPR distance[y] [L40] EXPR Weight[j] VAL [INFINITY=899] [L40] COND TRUE distance[x] > distance[y] + Weight[j] [L42] distance[x] = -1 VAL [INFINITY=899] [L36] j++ VAL [INFINITY=899] [L36] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L34] i++ VAL [INFINITY=899] [L34] COND TRUE i < nodecount [L36] j = 0 VAL [INFINITY=899] [L36] COND TRUE j < edgecount [L38] EXPR Dest[j] [L38] x = Dest[j] [L39] EXPR Source[j] [L39] y = Source[j] [L40] EXPR distance[x] [L40] EXPR distance[y] [L40] EXPR Weight[j] VAL [INFINITY=899] [L40] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L36] j++ VAL [INFINITY=899] [L36] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L34] i++ VAL [INFINITY=899] [L34] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L46] i = 0 VAL [INFINITY=899] [L46] COND TRUE i < edgecount [L48] EXPR Dest[i] [L48] x = Dest[i] [L49] EXPR Source[i] [L49] y = Source[i] [L50] EXPR distance[x] [L50] EXPR distance[y] [L50] EXPR Weight[i] VAL [INFINITY=899] [L50] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L46] i++ VAL [INFINITY=899] [L46] COND FALSE !(i < edgecount) VAL [INFINITY=899] [L56] i = 0 VAL [INFINITY=899] [L56] COND TRUE i < nodecount [L58] distance[i] [L6] COND FALSE !(!(cond)) VAL [INFINITY=899] [L56] i++ VAL [INFINITY=899] [L56] COND TRUE i < nodecount [L58] distance[i] [L6] COND TRUE !(cond) VAL [INFINITY=899] [L7] __VERIFIER_error() VAL [INFINITY=899] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 149.1s, OverallIterations: 19, TraceHistogramMax: 4, AutomataDifference: 110.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 580 SDtfs, 4691 SDslu, 3431 SDs, 0 SdLazy, 6222 SolverSat, 2704 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 25.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 985 GetRequests, 347 SyntacticMatches, 17 SemanticMatches, 621 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16018 ImplicationChecksByTransitivity, 109.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=484occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 1763 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 32.2s InterpolantComputationTime, 963 NumberOfCodeBlocks, 957 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 892 ConstructedInterpolants, 78 QuantifiedInterpolants, 504580 SizeOfPredicates, 150 NumberOfNonLiveVariables, 3389 ConjunctsInSsa, 333 ConjunctsInUnsatCore, 33 InterpolantComputations, 3 PerfectInterpolantSequences, 146/393 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...