./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum.i --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_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 279fae57395782089eff32ec1396d1726d808c7f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 21:22:40,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:22:40,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:22:40,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:22:40,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:22:40,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:22:40,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:22:40,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:22:40,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:22:40,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:22:40,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:22:40,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:22:40,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:22:40,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:22:40,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:22:40,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:22:40,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:22:40,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:22:40,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:22:40,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:22:40,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:22:40,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:22:40,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:22:40,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:22:40,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:22:40,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:22:40,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:22:40,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:22:40,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:22:40,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:22:40,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:22:40,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:22:40,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:22:40,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:22:40,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:22:40,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:22:40,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:22:40,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:22:40,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:22:40,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:22:40,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:22:40,987 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 21:22:41,011 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:22:41,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:22:41,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:22:41,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:22:41,012 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:22:41,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:22:41,013 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:22:41,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:22:41,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:22:41,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:22:41,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:22:41,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:22:41,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:22:41,014 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:22:41,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:22:41,015 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:22:41,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:22:41,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:22:41,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:22:41,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:22:41,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:22:41,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:22:41,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:22:41,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:22:41,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:22:41,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:22:41,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 21:22:41,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:22:41,017 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_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 -> 279fae57395782089eff32ec1396d1726d808c7f [2019-11-15 21:22:41,043 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:22:41,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:22:41,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:22:41,058 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:22:41,059 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:22:41,059 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-15 21:22:41,114 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/data/2816cfef4/0833935556844521b25b767db66ff633/FLAG90bd7e33a [2019-11-15 21:22:41,461 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:22:41,462 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-15 21:22:41,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/data/2816cfef4/0833935556844521b25b767db66ff633/FLAG90bd7e33a [2019-11-15 21:22:41,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/data/2816cfef4/0833935556844521b25b767db66ff633 [2019-11-15 21:22:41,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:22:41,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:22:41,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:22:41,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:22:41,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:22:41,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:22:41" (1/1) ... [2019-11-15 21:22:41,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@511c7b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:41, skipping insertion in model container [2019-11-15 21:22:41,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:22:41" (1/1) ... [2019-11-15 21:22:41,869 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:22:41,885 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:22:42,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:22:42,032 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:22:42,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:22:42,140 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:22:42,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42 WrapperNode [2019-11-15 21:22:42,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:22:42,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:22:42,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:22:42,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:22:42,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:22:42,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:22:42,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:22:42,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:22:42,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... [2019-11-15 21:22:42,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:22:42,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:22:42,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:22:42,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:22:42,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 21:22:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:22:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:22:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 21:22:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 21:22:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 21:22:43,610 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:22:43,611 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-15 21:22:43,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:22:43 BoogieIcfgContainer [2019-11-15 21:22:43,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:22:43,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:22:43,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:22:43,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:22:43,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:22:41" (1/3) ... [2019-11-15 21:22:43,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d334b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:22:43, skipping insertion in model container [2019-11-15 21:22:43,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:42" (2/3) ... [2019-11-15 21:22:43,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d334b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:22:43, skipping insertion in model container [2019-11-15 21:22:43,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:22:43" (3/3) ... [2019-11-15 21:22:43,625 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2019-11-15 21:22:43,636 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:22:43,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:22:43,661 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:22:43,694 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:22:43,694 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:22:43,698 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:22:43,698 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:22:43,698 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:22:43,698 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:22:43,699 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:22:43,699 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:22:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-15 21:22:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 21:22:43,734 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:43,735 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:22:43,738 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2019-11-15 21:22:43,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:43,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180840705] [2019-11-15 21:22:43,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:43,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:43,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:43,930 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 21:22:43,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180840705] [2019-11-15 21:22:43,932 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:22:43,932 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 21:22:43,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365443396] [2019-11-15 21:22:43,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 21:22:43,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 21:22:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 21:22:43,954 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-15 21:22:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:43,978 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2019-11-15 21:22:43,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 21:22:43,980 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-15 21:22:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:43,987 INFO L225 Difference]: With dead ends: 59 [2019-11-15 21:22:43,988 INFO L226 Difference]: Without dead ends: 27 [2019-11-15 21:22:43,990 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 21:22:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-15 21:22:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-15 21:22:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-15 21:22:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-15 21:22:44,021 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2019-11-15 21:22:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:44,022 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-15 21:22:44,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 21:22:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-15 21:22:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 21:22:44,023 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:44,023 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:22:44,023 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:44,024 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2019-11-15 21:22:44,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:44,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116528274] [2019-11-15 21:22:44,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:44,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:44,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:44,040 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:44,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131554333] [2019-11-15 21:22:44,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:44,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:22:44,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:44,156 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 21:22:44,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116528274] [2019-11-15 21:22:44,156 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:44,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131554333] [2019-11-15 21:22:44,157 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:22:44,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 21:22:44,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84643931] [2019-11-15 21:22:44,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 21:22:44,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 21:22:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 21:22:44,160 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-15 21:22:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:44,215 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2019-11-15 21:22:44,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 21:22:44,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-15 21:22:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:44,217 INFO L225 Difference]: With dead ends: 65 [2019-11-15 21:22:44,217 INFO L226 Difference]: Without dead ends: 48 [2019-11-15 21:22:44,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 21:22:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-15 21:22:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-11-15 21:22:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-15 21:22:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2019-11-15 21:22:44,227 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2019-11-15 21:22:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:44,228 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2019-11-15 21:22:44,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 21:22:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2019-11-15 21:22:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 21:22:44,229 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:44,230 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:22:44,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:44,436 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2019-11-15 21:22:44,437 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:44,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456646593] [2019-11-15 21:22:44,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:44,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:44,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:44,649 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 21:22:44,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456646593] [2019-11-15 21:22:44,650 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:22:44,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-15 21:22:44,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141254627] [2019-11-15 21:22:44,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 21:22:44,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 21:22:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:22:44,652 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 8 states. [2019-11-15 21:22:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:44,755 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2019-11-15 21:22:44,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 21:22:44,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-15 21:22:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:44,758 INFO L225 Difference]: With dead ends: 96 [2019-11-15 21:22:44,758 INFO L226 Difference]: Without dead ends: 91 [2019-11-15 21:22:44,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:22:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-15 21:22:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2019-11-15 21:22:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-15 21:22:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-11-15 21:22:44,775 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 18 [2019-11-15 21:22:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:44,776 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-11-15 21:22:44,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 21:22:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-11-15 21:22:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 21:22:44,778 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:44,778 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] [2019-11-15 21:22:44,779 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:44,779 INFO L82 PathProgramCache]: Analyzing trace with hash -995174774, now seen corresponding path program 1 times [2019-11-15 21:22:44,780 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:44,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69394552] [2019-11-15 21:22:44,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:44,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:44,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:44,808 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:44,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686913818] [2019-11-15 21:22:44,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:44,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:22:44,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 21:22:44,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69394552] [2019-11-15 21:22:44,924 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:44,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686913818] [2019-11-15 21:22:44,925 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:22:44,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 21:22:44,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68659706] [2019-11-15 21:22:44,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 21:22:44,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 21:22:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 21:22:44,927 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 3 states. [2019-11-15 21:22:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:44,985 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2019-11-15 21:22:44,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 21:22:44,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-15 21:22:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:44,988 INFO L225 Difference]: With dead ends: 115 [2019-11-15 21:22:44,988 INFO L226 Difference]: Without dead ends: 61 [2019-11-15 21:22:44,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 21:22:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-15 21:22:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-15 21:22:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-15 21:22:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2019-11-15 21:22:44,997 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 21 [2019-11-15 21:22:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:44,998 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2019-11-15 21:22:44,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 21:22:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2019-11-15 21:22:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 21:22:44,999 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:44,999 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] [2019-11-15 21:22:45,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:45,200 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2100366548, now seen corresponding path program 1 times [2019-11-15 21:22:45,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:45,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404057194] [2019-11-15 21:22:45,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:45,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:45,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:45,224 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:45,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598212855] [2019-11-15 21:22:45,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:45,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 21:22:45,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:45,317 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 21:22:45,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404057194] [2019-11-15 21:22:45,317 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:45,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598212855] [2019-11-15 21:22:45,318 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 21:22:45,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-15 21:22:45,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948634771] [2019-11-15 21:22:45,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:22:45,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:22:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:22:45,320 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 4 states. [2019-11-15 21:22:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:45,421 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2019-11-15 21:22:45,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:22:45,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-15 21:22:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:45,422 INFO L225 Difference]: With dead ends: 117 [2019-11-15 21:22:45,422 INFO L226 Difference]: Without dead ends: 63 [2019-11-15 21:22:45,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:22:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-15 21:22:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-15 21:22:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-15 21:22:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-11-15 21:22:45,433 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 23 [2019-11-15 21:22:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:45,438 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-11-15 21:22:45,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:22:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-11-15 21:22:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 21:22:45,441 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:45,442 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, 1, 1, 1] [2019-11-15 21:22:45,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:45,642 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash 962228046, now seen corresponding path program 2 times [2019-11-15 21:22:45,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:45,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797524441] [2019-11-15 21:22:45,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:45,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:45,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:45,664 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:45,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243739016] [2019-11-15 21:22:45,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:45,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-15 21:22:45,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:22:45,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:22:45,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 21:22:45,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797524441] [2019-11-15 21:22:45,785 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:45,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243739016] [2019-11-15 21:22:45,785 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:22:45,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 21:22:45,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159174766] [2019-11-15 21:22:45,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:22:45,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:45,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:22:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:22:45,787 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 4 states. [2019-11-15 21:22:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:45,879 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2019-11-15 21:22:45,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:22:45,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-15 21:22:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:45,881 INFO L225 Difference]: With dead ends: 127 [2019-11-15 21:22:45,881 INFO L226 Difference]: Without dead ends: 77 [2019-11-15 21:22:45,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:22:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-15 21:22:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2019-11-15 21:22:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-15 21:22:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2019-11-15 21:22:45,892 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 25 [2019-11-15 21:22:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:45,892 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2019-11-15 21:22:45,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:22:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2019-11-15 21:22:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-15 21:22:45,894 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:45,894 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:22:46,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:46,099 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1979262774, now seen corresponding path program 1 times [2019-11-15 21:22:46,099 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:46,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388764141] [2019-11-15 21:22:46,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:46,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:46,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:46,131 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:46,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699699612] [2019-11-15 21:22:46,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:46,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 21:22:46,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 21:22:46,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388764141] [2019-11-15 21:22:46,236 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:46,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699699612] [2019-11-15 21:22:46,237 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 21:22:46,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-15 21:22:46,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613307054] [2019-11-15 21:22:46,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:22:46,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:22:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:22:46,239 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 5 states. [2019-11-15 21:22:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:46,352 INFO L93 Difference]: Finished difference Result 150 states and 206 transitions. [2019-11-15 21:22:46,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:22:46,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-11-15 21:22:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:46,354 INFO L225 Difference]: With dead ends: 150 [2019-11-15 21:22:46,354 INFO L226 Difference]: Without dead ends: 92 [2019-11-15 21:22:46,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:22:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-15 21:22:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-15 21:22:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-15 21:22:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2019-11-15 21:22:46,364 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 34 [2019-11-15 21:22:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:46,365 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2019-11-15 21:22:46,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:22:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2019-11-15 21:22:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-15 21:22:46,366 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:46,366 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-15 21:22:46,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:46,570 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash -387145522, now seen corresponding path program 2 times [2019-11-15 21:22:46,570 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:46,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723888413] [2019-11-15 21:22:46,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:46,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:46,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:46,612 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:46,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104024756] [2019-11-15 21:22:46,628 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:46,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-15 21:22:46,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:22:46,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:22:46,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-15 21:22:46,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723888413] [2019-11-15 21:22:46,714 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:46,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104024756] [2019-11-15 21:22:46,714 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:22:46,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 21:22:46,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161907338] [2019-11-15 21:22:46,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:22:46,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:22:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:22:46,716 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 4 states. [2019-11-15 21:22:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:46,774 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-11-15 21:22:46,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:22:46,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-15 21:22:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:46,776 INFO L225 Difference]: With dead ends: 122 [2019-11-15 21:22:46,776 INFO L226 Difference]: Without dead ends: 91 [2019-11-15 21:22:46,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:22:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-15 21:22:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-15 21:22:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-15 21:22:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2019-11-15 21:22:46,785 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 43 [2019-11-15 21:22:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:46,785 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2019-11-15 21:22:46,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:22:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2019-11-15 21:22:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 21:22:46,787 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:46,787 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2019-11-15 21:22:46,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:46,988 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 1 times [2019-11-15 21:22:46,988 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:46,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686591207] [2019-11-15 21:22:46,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:46,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:46,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:47,002 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:47,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364213690] [2019-11-15 21:22:47,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:47,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 21:22:47,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-15 21:22:47,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686591207] [2019-11-15 21:22:47,137 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:47,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364213690] [2019-11-15 21:22:47,137 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 21:22:47,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-15 21:22:47,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053507051] [2019-11-15 21:22:47,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 21:22:47,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:47,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 21:22:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:22:47,138 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 9 states. [2019-11-15 21:22:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:47,348 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2019-11-15 21:22:47,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 21:22:47,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-11-15 21:22:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:47,350 INFO L225 Difference]: With dead ends: 197 [2019-11-15 21:22:47,350 INFO L226 Difference]: Without dead ends: 92 [2019-11-15 21:22:47,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:22:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-15 21:22:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-15 21:22:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-15 21:22:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2019-11-15 21:22:47,363 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 45 [2019-11-15 21:22:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:47,364 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2019-11-15 21:22:47,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 21:22:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2019-11-15 21:22:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-15 21:22:47,365 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:47,366 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:22:47,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:47,566 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash -3446958, now seen corresponding path program 2 times [2019-11-15 21:22:47,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:47,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586972275] [2019-11-15 21:22:47,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:47,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:47,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:47,586 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:47,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139197129] [2019-11-15 21:22:47,587 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:47,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:22:47,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:22:47,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 21:22:47,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-15 21:22:47,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586972275] [2019-11-15 21:22:47,749 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:47,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139197129] [2019-11-15 21:22:47,750 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 21:22:47,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-15 21:22:47,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398726984] [2019-11-15 21:22:47,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 21:22:47,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 21:22:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:22:47,751 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 9 states. [2019-11-15 21:22:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:47,920 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2019-11-15 21:22:47,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 21:22:47,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-15 21:22:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:47,921 INFO L225 Difference]: With dead ends: 171 [2019-11-15 21:22:47,921 INFO L226 Difference]: Without dead ends: 116 [2019-11-15 21:22:47,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:22:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-15 21:22:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2019-11-15 21:22:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-15 21:22:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2019-11-15 21:22:47,937 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 47 [2019-11-15 21:22:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:47,938 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2019-11-15 21:22:47,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 21:22:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2019-11-15 21:22:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-15 21:22:47,939 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:47,939 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 21:22:48,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:48,144 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash -384159915, now seen corresponding path program 1 times [2019-11-15 21:22:48,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:48,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145881989] [2019-11-15 21:22:48,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:48,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:48,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:48,158 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:48,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122665014] [2019-11-15 21:22:48,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:22:48,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 21:22:48,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-15 21:22:48,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145881989] [2019-11-15 21:22:48,286 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:48,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122665014] [2019-11-15 21:22:48,286 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 21:22:48,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-15 21:22:48,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724215349] [2019-11-15 21:22:48,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 21:22:48,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:48,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 21:22:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:22:48,288 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 8 states. [2019-11-15 21:22:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:48,388 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2019-11-15 21:22:48,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 21:22:48,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-15 21:22:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:48,390 INFO L225 Difference]: With dead ends: 138 [2019-11-15 21:22:48,390 INFO L226 Difference]: Without dead ends: 105 [2019-11-15 21:22:48,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-11-15 21:22:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-15 21:22:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-15 21:22:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-15 21:22:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2019-11-15 21:22:48,398 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 53 [2019-11-15 21:22:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:48,398 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2019-11-15 21:22:48,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 21:22:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2019-11-15 21:22:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-15 21:22:48,399 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:48,399 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:22:48,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:48,601 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1685231241, now seen corresponding path program 2 times [2019-11-15 21:22:48,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:48,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309076127] [2019-11-15 21:22:48,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:48,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:48,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:48,615 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:48,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920871050] [2019-11-15 21:22:48,623 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:48,683 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:22:48,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:22:48,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 21:22:48,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:22:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-15 21:22:48,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309076127] [2019-11-15 21:22:48,790 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 21:22:48,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920871050] [2019-11-15 21:22:48,790 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 21:22:48,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-15 21:22:48,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837650990] [2019-11-15 21:22:48,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 21:22:48,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:22:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:22:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:22:48,791 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 10 states. [2019-11-15 21:22:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:22:49,066 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2019-11-15 21:22:49,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 21:22:49,067 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-11-15 21:22:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:22:49,068 INFO L225 Difference]: With dead ends: 272 [2019-11-15 21:22:49,068 INFO L226 Difference]: Without dead ends: 187 [2019-11-15 21:22:49,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-15 21:22:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-15 21:22:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2019-11-15 21:22:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-15 21:22:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-11-15 21:22:49,081 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 55 [2019-11-15 21:22:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:22:49,083 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-11-15 21:22:49,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 21:22:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-11-15 21:22:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-15 21:22:49,084 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:49,084 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:22:49,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:49,287 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:49,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:49,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2019-11-15 21:22:49,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:49,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303578251] [2019-11-15 21:22:49,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:49,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:49,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:49,298 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 21:22:49,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738955766] [2019-11-15 21:22:49,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/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 21:22:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:22:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:22:49,456 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:22:49,457 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 21:22:49,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:22:49,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:22:49 BoogieIcfgContainer [2019-11-15 21:22:49,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:22:49,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:22:49,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:22:49,736 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:22:49,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:22:43" (3/4) ... [2019-11-15 21:22:49,739 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 21:22:49,832 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a267afc5-0bbb-4c9b-b924-7d2c1ac48448/bin/uautomizer/witness.graphml [2019-11-15 21:22:49,832 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:22:49,834 INFO L168 Benchmark]: Toolchain (without parser) took 7984.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 219.7 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -64.2 MB). Peak memory consumption was 155.5 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:49,835 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:49,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.5 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -206.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:49,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:49,838 INFO L168 Benchmark]: Boogie Preprocessor took 73.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:49,838 INFO L168 Benchmark]: RCFGBuilder took 1319.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:49,839 INFO L168 Benchmark]: TraceAbstraction took 6122.50 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.3 MB). Peak memory consumption was 164.5 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:49,845 INFO L168 Benchmark]: Witness Printer took 96.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:49,847 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 290.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.5 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -206.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 76.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 1319.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6122.50 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.3 MB). Peak memory consumption was 164.5 MB. Max. memory is 11.5 GB. * Witness Printer took 96.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L6] int i; [L7] i = 0 VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND FALSE !(i < N) VAL [N=3] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [N=3] [L46] COND TRUE i N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L53] __VERIFIER_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.0s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 579 SDslu, 411 SDs, 0 SdLazy, 718 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 455 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 37966 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1402 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 168/199 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...