./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:55:37,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:55:37,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:55:37,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:55:37,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:55:37,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:55:37,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:55:37,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:55:37,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:55:37,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:55:37,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:55:37,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:55:37,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:55:37,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:55:37,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:55:37,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:55:37,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:55:37,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:55:37,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:55:37,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:55:37,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:55:37,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:55:37,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:55:37,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:55:37,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:55:37,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:55:37,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:55:37,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:55:37,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:55:37,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:55:37,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:55:37,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:55:37,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:55:37,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:55:37,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:55:37,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:55:37,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:55:37,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:55:37,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:55:37,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:55:37,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:55:37,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:55:37,551 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:55:37,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:55:37,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:55:37,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:55:37,553 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:55:37,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:55:37,554 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:55:37,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:55:37,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:55:37,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:55:37,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:55:37,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:55:37,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:55:37,555 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:55:37,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:55:37,556 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:55:37,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:55:37,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:55:37,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:55:37,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:55:37,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:55:37,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:55:37,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:55:37,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:55:37,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:55:37,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:55:37,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:55:37,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:55:37,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:55:37,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae [2020-11-29 23:55:37,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:55:37,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:55:37,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:55:37,833 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:55:37,835 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:55:37,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum.i [2020-11-29 23:55:37,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/data/3f6476d85/04d3be7957a3445ab3fc193eb1f03b86/FLAGca3c14f82 [2020-11-29 23:55:38,478 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:55:38,478 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/sv-benchmarks/c/reducercommutativity/rangesum.i [2020-11-29 23:55:38,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/data/3f6476d85/04d3be7957a3445ab3fc193eb1f03b86/FLAGca3c14f82 [2020-11-29 23:55:38,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/data/3f6476d85/04d3be7957a3445ab3fc193eb1f03b86 [2020-11-29 23:55:38,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:55:38,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:55:38,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:38,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:55:38,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:55:38,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:38" (1/1) ... [2020-11-29 23:55:38,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6726c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:38, skipping insertion in model container [2020-11-29 23:55:38,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:38" (1/1) ... [2020-11-29 23:55:38,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:55:38,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:55:39,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:39,139 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:55:39,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:39,178 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:55:39,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39 WrapperNode [2020-11-29 23:55:39,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:39,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:39,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:55:39,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:55:39,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:39,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:55:39,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:55:39,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:55:39,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... [2020-11-29 23:55:39,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:55:39,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:55:39,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:55:39,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:55:39,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:55:39,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:55:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:55:39,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:55:39,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:55:39,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:55:39,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:55:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:55:39,982 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:55:39,982 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-29 23:55:39,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:39 BoogieIcfgContainer [2020-11-29 23:55:39,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:55:39,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:55:39,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:55:39,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:55:39,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:55:38" (1/3) ... [2020-11-29 23:55:39,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e28804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:39, skipping insertion in model container [2020-11-29 23:55:39,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:39" (2/3) ... [2020-11-29 23:55:39,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e28804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:39, skipping insertion in model container [2020-11-29 23:55:39,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:39" (3/3) ... [2020-11-29 23:55:39,993 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-11-29 23:55:40,003 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:55:40,008 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:55:40,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:55:40,096 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:55:40,097 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:55:40,097 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:55:40,097 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:55:40,097 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:55:40,097 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:55:40,098 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:55:40,098 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:55:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 23:55:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:55:40,122 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:40,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:40,123 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash -881245604, now seen corresponding path program 1 times [2020-11-29 23:55:40,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:40,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929514763] [2020-11-29 23:55:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929514763] [2020-11-29 23:55:40,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:40,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:55:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235147182] [2020-11-29 23:55:40,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:55:40,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:55:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:55:40,299 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 23:55:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:40,317 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2020-11-29 23:55:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:55:40,318 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-11-29 23:55:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:40,326 INFO L225 Difference]: With dead ends: 61 [2020-11-29 23:55:40,327 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 23:55:40,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:55:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 23:55:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 23:55:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 23:55:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 23:55:40,363 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 19 [2020-11-29 23:55:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:40,363 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 23:55:40,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:55:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 23:55:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:55:40,364 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:40,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:40,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:55:40,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:40,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1266288958, now seen corresponding path program 1 times [2020-11-29 23:55:40,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:40,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871792715] [2020-11-29 23:55:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:40,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871792715] [2020-11-29 23:55:40,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:40,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:55:40,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171764101] [2020-11-29 23:55:40,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:55:40,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:55:40,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:55:40,433 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-11-29 23:55:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:40,506 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-11-29 23:55:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:55:40,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-29 23:55:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:40,508 INFO L225 Difference]: With dead ends: 53 [2020-11-29 23:55:40,508 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 23:55:40,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:55:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 23:55:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-11-29 23:55:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 23:55:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2020-11-29 23:55:40,514 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2020-11-29 23:55:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:40,514 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2020-11-29 23:55:40,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:55:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2020-11-29 23:55:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 23:55:40,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:40,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:40,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:55:40,516 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1457317472, now seen corresponding path program 1 times [2020-11-29 23:55:40,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:40,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439134557] [2020-11-29 23:55:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:40,544 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:40,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966221658] [2020-11-29 23:55:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:40,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:55:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:55:40,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439134557] [2020-11-29 23:55:40,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:40,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966221658] [2020-11-29 23:55:40,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:40,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:55:40,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767239130] [2020-11-29 23:55:40,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:55:40,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:55:40,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:55:40,695 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 3 states. [2020-11-29 23:55:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:40,821 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2020-11-29 23:55:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:55:40,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-29 23:55:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:40,823 INFO L225 Difference]: With dead ends: 69 [2020-11-29 23:55:40,823 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 23:55:40,824 INFO L677 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 [2020-11-29 23:55:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 23:55:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2020-11-29 23:55:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 23:55:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2020-11-29 23:55:40,831 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 21 [2020-11-29 23:55:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:40,831 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2020-11-29 23:55:40,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:55:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2020-11-29 23:55:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 23:55:40,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:40,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:41,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 23:55:41,060 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash 479331490, now seen corresponding path program 1 times [2020-11-29 23:55:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:41,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205573020] [2020-11-29 23:55:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:55:41,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205573020] [2020-11-29 23:55:41,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:41,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:41,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144162881] [2020-11-29 23:55:41,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:55:41,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:41,155 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand 4 states. [2020-11-29 23:55:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:41,280 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2020-11-29 23:55:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:41,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 23:55:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:41,285 INFO L225 Difference]: With dead ends: 81 [2020-11-29 23:55:41,285 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 23:55:41,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 23:55:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-29 23:55:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 23:55:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-11-29 23:55:41,294 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 21 [2020-11-29 23:55:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:41,294 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-11-29 23:55:41,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:55:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-11-29 23:55:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 23:55:41,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:41,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:41,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 23:55:41,296 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1080672290, now seen corresponding path program 1 times [2020-11-29 23:55:41,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:41,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263884194] [2020-11-29 23:55:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 23:55:41,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263884194] [2020-11-29 23:55:41,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:41,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536738921] [2020-11-29 23:55:41,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:55:41,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:41,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:41,405 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 4 states. [2020-11-29 23:55:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:41,510 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2020-11-29 23:55:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:41,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-29 23:55:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:41,512 INFO L225 Difference]: With dead ends: 65 [2020-11-29 23:55:41,512 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 23:55:41,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 23:55:41,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-11-29 23:55:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 23:55:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-11-29 23:55:41,536 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-11-29 23:55:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:41,537 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-11-29 23:55:41,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:55:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-11-29 23:55:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 23:55:41,540 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:41,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:41,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 23:55:41,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash -694882496, now seen corresponding path program 1 times [2020-11-29 23:55:41,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:41,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71781313] [2020-11-29 23:55:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 23:55:41,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71781313] [2020-11-29 23:55:41,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:41,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 23:55:41,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216639375] [2020-11-29 23:55:41,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:41,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:41,746 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-11-29 23:55:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:42,477 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2020-11-29 23:55:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:55:42,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-29 23:55:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:42,483 INFO L225 Difference]: With dead ends: 119 [2020-11-29 23:55:42,484 INFO L226 Difference]: Without dead ends: 113 [2020-11-29 23:55:42,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-29 23:55:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 73. [2020-11-29 23:55:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 23:55:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-11-29 23:55:42,500 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-11-29 23:55:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:42,500 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-11-29 23:55:42,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-11-29 23:55:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 23:55:42,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:42,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:42,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 23:55:42,502 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 812915687, now seen corresponding path program 1 times [2020-11-29 23:55:42,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:42,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886452745] [2020-11-29 23:55:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:42,541 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:42,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626107341] [2020-11-29 23:55:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:55:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 23:55:42,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886452745] [2020-11-29 23:55:42,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:42,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626107341] [2020-11-29 23:55:42,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:42,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-29 23:55:42,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398315216] [2020-11-29 23:55:42,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:55:42,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:42,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:42,711 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 4 states. [2020-11-29 23:55:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:42,811 INFO L93 Difference]: Finished difference Result 143 states and 193 transitions. [2020-11-29 23:55:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:42,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-11-29 23:55:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:42,814 INFO L225 Difference]: With dead ends: 143 [2020-11-29 23:55:42,814 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 23:55:42,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 23:55:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-11-29 23:55:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 23:55:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2020-11-29 23:55:42,829 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 35 [2020-11-29 23:55:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:42,829 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 100 transitions. [2020-11-29 23:55:42,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:55:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 100 transitions. [2020-11-29 23:55:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 23:55:42,831 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:42,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:43,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:43,036 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1827900151, now seen corresponding path program 2 times [2020-11-29 23:55:43,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:43,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923652970] [2020-11-29 23:55:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:43,053 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:43,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894020790] [2020-11-29 23:55:43,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:43,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:43,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:55:43,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 23:55:43,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923652970] [2020-11-29 23:55:43,422 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:43,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894020790] [2020-11-29 23:55:43,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:43,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:55:43,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045018902] [2020-11-29 23:55:43,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:43,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:43,427 INFO L87 Difference]: Start difference. First operand 75 states and 100 transitions. Second operand 5 states. [2020-11-29 23:55:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:43,554 INFO L93 Difference]: Finished difference Result 156 states and 212 transitions. [2020-11-29 23:55:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:55:43,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-11-29 23:55:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:43,556 INFO L225 Difference]: With dead ends: 156 [2020-11-29 23:55:43,556 INFO L226 Difference]: Without dead ends: 95 [2020-11-29 23:55:43,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-29 23:55:43,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2020-11-29 23:55:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 23:55:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-11-29 23:55:43,567 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 37 [2020-11-29 23:55:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:43,568 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-11-29 23:55:43,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-11-29 23:55:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 23:55:43,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:43,575 INFO L422 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, 1] [2020-11-29 23:55:43,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:43,777 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1557952959, now seen corresponding path program 3 times [2020-11-29 23:55:43,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:43,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519170990] [2020-11-29 23:55:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:43,790 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:43,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001295470] [2020-11-29 23:55:43,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:44,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 23:55:44,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:55:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:44,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:55:44,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-29 23:55:44,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519170990] [2020-11-29 23:55:44,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:44,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001295470] [2020-11-29 23:55:44,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:44,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 23:55:44,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877507057] [2020-11-29 23:55:44,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:55:44,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:44,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:55:44,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:55:44,222 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-11-29 23:55:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:44,466 INFO L93 Difference]: Finished difference Result 212 states and 274 transitions. [2020-11-29 23:55:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:55:44,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-11-29 23:55:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:44,470 INFO L225 Difference]: With dead ends: 212 [2020-11-29 23:55:44,470 INFO L226 Difference]: Without dead ends: 140 [2020-11-29 23:55:44,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-29 23:55:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2020-11-29 23:55:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-29 23:55:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 147 transitions. [2020-11-29 23:55:44,499 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 147 transitions. Word has length 46 [2020-11-29 23:55:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:44,501 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 147 transitions. [2020-11-29 23:55:44,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:55:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 147 transitions. [2020-11-29 23:55:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 23:55:44,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:44,508 INFO L422 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, 1] [2020-11-29 23:55:44,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:44,724 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:44,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1574251559, now seen corresponding path program 1 times [2020-11-29 23:55:44,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:44,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196771022] [2020-11-29 23:55:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:44,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:44,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216431018] [2020-11-29 23:55:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:55:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 23:55:44,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196771022] [2020-11-29 23:55:44,961 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:44,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216431018] [2020-11-29 23:55:44,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:44,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:55:44,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565832844] [2020-11-29 23:55:44,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:55:44,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:44,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:55:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:44,964 INFO L87 Difference]: Start difference. First operand 117 states and 147 transitions. Second operand 9 states. [2020-11-29 23:55:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:45,155 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2020-11-29 23:55:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:55:45,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-11-29 23:55:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:45,156 INFO L225 Difference]: With dead ends: 231 [2020-11-29 23:55:45,157 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 23:55:45,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:55:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 23:55:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-11-29 23:55:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-29 23:55:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 149 transitions. [2020-11-29 23:55:45,175 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 149 transitions. Word has length 46 [2020-11-29 23:55:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:45,175 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 149 transitions. [2020-11-29 23:55:45,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:55:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 149 transitions. [2020-11-29 23:55:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 23:55:45,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:45,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:45,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 23:55:45,404 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1269618235, now seen corresponding path program 2 times [2020-11-29 23:55:45,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:45,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937860000] [2020-11-29 23:55:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:45,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:45,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570911015] [2020-11-29 23:55:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:45,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:55:45,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 23:55:45,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937860000] [2020-11-29 23:55:45,632 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:45,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570911015] [2020-11-29 23:55:45,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:45,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:55:45,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340273651] [2020-11-29 23:55:45,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:55:45,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:45,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:55:45,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:45,635 INFO L87 Difference]: Start difference. First operand 119 states and 149 transitions. Second operand 9 states. [2020-11-29 23:55:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:45,892 INFO L93 Difference]: Finished difference Result 173 states and 213 transitions. [2020-11-29 23:55:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:55:45,893 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-11-29 23:55:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:45,894 INFO L225 Difference]: With dead ends: 173 [2020-11-29 23:55:45,895 INFO L226 Difference]: Without dead ends: 154 [2020-11-29 23:55:45,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:55:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-29 23:55:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 129. [2020-11-29 23:55:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-29 23:55:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2020-11-29 23:55:45,910 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 48 [2020-11-29 23:55:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:45,910 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2020-11-29 23:55:45,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:55:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2020-11-29 23:55:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-29 23:55:45,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:45,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:46,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:46,127 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:46,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1442698108, now seen corresponding path program 1 times [2020-11-29 23:55:46,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:46,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982957369] [2020-11-29 23:55:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:46,143 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:46,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338397853] [2020-11-29 23:55:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:55:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 23:55:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982957369] [2020-11-29 23:55:46,341 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338397853] [2020-11-29 23:55:46,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:46,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 23:55:46,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498050463] [2020-11-29 23:55:46,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:46,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:46,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:46,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:46,346 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand 8 states. [2020-11-29 23:55:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:46,497 INFO L93 Difference]: Finished difference Result 183 states and 224 transitions. [2020-11-29 23:55:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:55:46,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-11-29 23:55:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:46,499 INFO L225 Difference]: With dead ends: 183 [2020-11-29 23:55:46,499 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 23:55:46,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:55:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 23:55:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-11-29 23:55:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-29 23:55:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 165 transitions. [2020-11-29 23:55:46,512 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 165 transitions. Word has length 54 [2020-11-29 23:55:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:46,512 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 165 transitions. [2020-11-29 23:55:46,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 165 transitions. [2020-11-29 23:55:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 23:55:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:46,513 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:46,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:46,731 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1170804122, now seen corresponding path program 2 times [2020-11-29 23:55:46,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:46,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37027110] [2020-11-29 23:55:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:46,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:46,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581532695] [2020-11-29 23:55:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:46,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:55:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:46,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-29 23:55:46,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37027110] [2020-11-29 23:55:46,979 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:46,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581532695] [2020-11-29 23:55:46,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:46,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:55:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868939758] [2020-11-29 23:55:46,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:55:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:55:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:46,981 INFO L87 Difference]: Start difference. First operand 135 states and 165 transitions. Second operand 9 states. [2020-11-29 23:55:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:47,427 INFO L93 Difference]: Finished difference Result 394 states and 491 transitions. [2020-11-29 23:55:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 23:55:47,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-11-29 23:55:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:47,430 INFO L225 Difference]: With dead ends: 394 [2020-11-29 23:55:47,430 INFO L226 Difference]: Without dead ends: 280 [2020-11-29 23:55:47,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:55:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-11-29 23:55:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 216. [2020-11-29 23:55:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-29 23:55:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 264 transitions. [2020-11-29 23:55:47,450 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 264 transitions. Word has length 56 [2020-11-29 23:55:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:47,450 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 264 transitions. [2020-11-29 23:55:47,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:55:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 264 transitions. [2020-11-29 23:55:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 23:55:47,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:47,452 INFO L422 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, 1] [2020-11-29 23:55:47,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 23:55:47,672 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1978303706, now seen corresponding path program 1 times [2020-11-29 23:55:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:47,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495946285] [2020-11-29 23:55:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:47,682 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:47,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129614343] [2020-11-29 23:55:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:47,819 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:47,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:47,957 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:47,957 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:55:48,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:48,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:55:48 BoogieIcfgContainer [2020-11-29 23:55:48,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:55:48,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:55:48,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:55:48,257 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:55:48,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:39" (3/4) ... [2020-11-29 23:55:48,259 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:55:48,351 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9c63e284-b825-4d72-b61b-169da3a64616/bin/uautomizer/witness.graphml [2020-11-29 23:55:48,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:55:48,352 INFO L168 Benchmark]: Toolchain (without parser) took 9512.67 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 63.8 MB in the beginning and 80.3 MB in the end (delta: -16.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:48,353 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory was 52.4 MB in the beginning and 52.4 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:48,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.42 ms. Allocated memory is still 92.3 MB. Free memory was 63.6 MB in the beginning and 68.6 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:48,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.19 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 66.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:48,354 INFO L168 Benchmark]: Boogie Preprocessor took 29.85 ms. Allocated memory is still 92.3 MB. Free memory was 66.6 MB in the beginning and 65.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:48,355 INFO L168 Benchmark]: RCFGBuilder took 730.97 ms. Allocated memory is still 92.3 MB. Free memory was 65.2 MB in the beginning and 45.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:48,355 INFO L168 Benchmark]: TraceAbstraction took 8271.03 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 45.2 MB in the beginning and 85.6 MB in the end (delta: -40.3 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:48,356 INFO L168 Benchmark]: Witness Printer took 94.08 ms. Allocated memory is still 134.2 MB. Free memory was 85.6 MB in the beginning and 80.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:48,359 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory was 52.4 MB in the beginning and 52.4 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.42 ms. Allocated memory is still 92.3 MB. Free memory was 63.6 MB in the beginning and 68.6 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.19 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 66.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.85 ms. Allocated memory is still 92.3 MB. Free memory was 66.6 MB in the beginning and 65.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 730.97 ms. Allocated memory is still 92.3 MB. Free memory was 65.2 MB in the beginning and 45.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8271.03 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 45.2 MB in the beginning and 85.6 MB in the end (delta: -40.3 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Witness Printer took 94.08 ms. Allocated memory is still 134.2 MB. Free memory was 85.6 MB in the beginning and 80.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int N; VAL [N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L17] int i; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [N=3] [L57] COND TRUE i N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 [L12] COND FALSE !(0) VAL [N=3] [L12] __assert_fail ("0", "rangesum.c", 17, __extension__ __PRETTY_FUNCTION__) VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 366 SDtfs, 612 SDslu, 550 SDs, 0 SdLazy, 785 SolverSat, 151 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=13, 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, 13 MinimizatonAttempts, 177 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 520 NumberOfCodeBlocks, 517 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 451 ConstructedInterpolants, 0 QuantifiedInterpolants, 50008 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1398 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 179/213 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...