./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebf5d98846752a57fac2a507e38ab464af4ccce6 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:18:11,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:18:11,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:18:11,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:18:11,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:18:11,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:18:11,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:18:11,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:18:11,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:18:11,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:18:11,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:18:11,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:18:11,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:18:11,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:18:11,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:18:11,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:18:11,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:18:11,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:18:11,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:18:11,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:18:11,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:18:11,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:18:11,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:18:11,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:18:11,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:18:11,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:18:11,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:18:11,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:18:11,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:18:11,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:18:11,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:18:11,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:18:11,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:18:11,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:18:11,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:18:11,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:18:11,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:18:11,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:18:11,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:18:11,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:18:11,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:18:11,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 14:18:11,474 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:18:11,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:18:11,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:18:11,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:18:11,475 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:18:11,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 14:18:11,476 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:18:11,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:18:11,477 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:18:11,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 14:18:11,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:18:11,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:18:11,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:18:11,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:18:11,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:18:11,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:18:11,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:18:11,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 14:18:11,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:18:11,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:18:11,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 14:18:11,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:18:11,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebf5d98846752a57fac2a507e38ab464af4ccce6 [2019-12-07 14:18:11,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:18:11,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:18:11,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:18:11,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:18:11,591 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:18:11,591 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-12-07 14:18:11,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/data/9aa659448/849bad2acc4745a68c5b4b69f39d3ee1/FLAGdf885b7a2 [2019-12-07 14:18:12,083 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:18:12,084 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-12-07 14:18:12,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/data/9aa659448/849bad2acc4745a68c5b4b69f39d3ee1/FLAGdf885b7a2 [2019-12-07 14:18:12,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/data/9aa659448/849bad2acc4745a68c5b4b69f39d3ee1 [2019-12-07 14:18:12,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:18:12,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:18:12,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:18:12,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:18:12,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:18:12,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3294143d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12, skipping insertion in model container [2019-12-07 14:18:12,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:18:12,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:18:12,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:18:12,259 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:18:12,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:18:12,286 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:18:12,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12 WrapperNode [2019-12-07 14:18:12,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:18:12,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:18:12,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:18:12,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:18:12,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:18:12,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:18:12,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:18:12,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:18:12,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... [2019-12-07 14:18:12,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:18:12,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:18:12,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:18:12,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:18:12,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:18:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 14:18:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 14:18:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:18:12,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:18:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 14:18:12,500 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:18:12,500 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 14:18:12,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:18:12 BoogieIcfgContainer [2019-12-07 14:18:12,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:18:12,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:18:12,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:18:12,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:18:12,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:18:12" (1/3) ... [2019-12-07 14:18:12,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@947effe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:18:12, skipping insertion in model container [2019-12-07 14:18:12,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:18:12" (2/3) ... [2019-12-07 14:18:12,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@947effe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:18:12, skipping insertion in model container [2019-12-07 14:18:12,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:18:12" (3/3) ... [2019-12-07 14:18:12,506 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2019-12-07 14:18:12,512 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:18:12,516 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 14:18:12,523 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 14:18:12,537 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:18:12,537 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 14:18:12,538 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:18:12,538 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:18:12,538 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:18:12,538 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:18:12,538 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:18:12,538 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:18:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-12-07 14:18:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:18:12,551 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:12,551 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:12,552 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1201566748, now seen corresponding path program 1 times [2019-12-07 14:18:12,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:12,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755305172] [2019-12-07 14:18:12,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:18:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:18:12,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755305172] [2019-12-07 14:18:12,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:18:12,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:18:12,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513628457] [2019-12-07 14:18:12,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 14:18:12,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 14:18:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 14:18:12,669 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-12-07 14:18:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:12,680 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2019-12-07 14:18:12,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 14:18:12,681 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-12-07 14:18:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:12,687 INFO L225 Difference]: With dead ends: 36 [2019-12-07 14:18:12,687 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 14:18:12,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 14:18:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 14:18:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 14:18:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 14:18:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 14:18:12,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-12-07 14:18:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:12,710 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 14:18:12,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 14:18:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-12-07 14:18:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:18:12,711 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:12,711 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:12,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1920794649, now seen corresponding path program 1 times [2019-12-07 14:18:12,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:12,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088827764] [2019-12-07 14:18:12,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:12,723 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:12,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211445018] [2019-12-07 14:18:12,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:18:12,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 14:18:12,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:18:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:18:12,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088827764] [2019-12-07 14:18:12,788 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:18:12,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211445018] [2019-12-07 14:18:12,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:18:12,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:18:12,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085972090] [2019-12-07 14:18:12,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:18:12,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:18:12,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:18:12,789 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2019-12-07 14:18:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:12,820 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-12-07 14:18:12,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:18:12,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-12-07 14:18:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:12,821 INFO L225 Difference]: With dead ends: 31 [2019-12-07 14:18:12,821 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 14:18:12,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:18:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 14:18:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-12-07 14:18:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 14:18:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-12-07 14:18:12,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-12-07 14:18:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:12,826 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-12-07 14:18:12,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:18:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-12-07 14:18:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 14:18:12,827 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:12,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:13,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:13,028 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1948223762, now seen corresponding path program 1 times [2019-12-07 14:18:13,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:13,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560940336] [2019-12-07 14:18:13,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:13,064 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:13,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864824639] [2019-12-07 14:18:13,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:18:13,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 14:18:13,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:18:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:18:13,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560940336] [2019-12-07 14:18:13,122 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:18:13,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864824639] [2019-12-07 14:18:13,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:18:13,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:18:13,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629730915] [2019-12-07 14:18:13,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:18:13,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:18:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:18:13,124 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2019-12-07 14:18:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:13,161 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-12-07 14:18:13,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:18:13,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-12-07 14:18:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:13,163 INFO L225 Difference]: With dead ends: 36 [2019-12-07 14:18:13,163 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 14:18:13,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:18:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 14:18:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2019-12-07 14:18:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 14:18:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-12-07 14:18:13,166 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2019-12-07 14:18:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:13,167 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-12-07 14:18:13,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:18:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-12-07 14:18:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 14:18:13,167 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:13,167 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:13,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:13,368 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1326513248, now seen corresponding path program 1 times [2019-12-07 14:18:13,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:13,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485448558] [2019-12-07 14:18:13,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:13,400 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:13,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394280539] [2019-12-07 14:18:13,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:18:13,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 14:18:13,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:18:13,472 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 14:18:13,472 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:18:13,474 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:18:13,474 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:18:13,475 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-12-07 14:18:13,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:18:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:18:13,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485448558] [2019-12-07 14:18:13,493 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:18:13,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394280539] [2019-12-07 14:18:13,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:18:13,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:18:13,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614163782] [2019-12-07 14:18:13,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:18:13,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:18:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:18:13,494 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2019-12-07 14:18:13,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:13,554 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-12-07 14:18:13,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:18:13,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-12-07 14:18:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:13,555 INFO L225 Difference]: With dead ends: 37 [2019-12-07 14:18:13,555 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 14:18:13,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:18:13,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 14:18:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-07 14:18:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 14:18:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-12-07 14:18:13,559 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2019-12-07 14:18:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:13,559 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-12-07 14:18:13,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:18:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-12-07 14:18:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 14:18:13,560 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:13,560 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:13,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:13,761 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:13,762 INFO L82 PathProgramCache]: Analyzing trace with hash 448494114, now seen corresponding path program 1 times [2019-12-07 14:18:13,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:13,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932377479] [2019-12-07 14:18:13,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:13,791 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:13,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773119013] [2019-12-07 14:18:13,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:18:13,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 14:18:13,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:18:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:18:13,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932377479] [2019-12-07 14:18:13,859 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:18:13,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773119013] [2019-12-07 14:18:13,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:18:13,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:18:13,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930357501] [2019-12-07 14:18:13,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:18:13,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:13,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:18:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:18:13,861 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 3 states. [2019-12-07 14:18:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:13,883 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-12-07 14:18:13,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:18:13,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-12-07 14:18:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:13,884 INFO L225 Difference]: With dead ends: 48 [2019-12-07 14:18:13,884 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 14:18:13,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:18:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 14:18:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-12-07 14:18:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 14:18:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-07 14:18:13,888 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-12-07 14:18:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:13,888 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-07 14:18:13,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:18:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-07 14:18:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 14:18:13,889 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:13,889 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:14,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:14,089 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:14,090 INFO L82 PathProgramCache]: Analyzing trace with hash -579781034, now seen corresponding path program 1 times [2019-12-07 14:18:14,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:14,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429824823] [2019-12-07 14:18:14,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:14,099 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:14,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065322023] [2019-12-07 14:18:14,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:18:14,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 14:18:14,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:18:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:18:14,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429824823] [2019-12-07 14:18:14,156 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:18:14,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065322023] [2019-12-07 14:18:14,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:18:14,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:18:14,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513623158] [2019-12-07 14:18:14,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:18:14,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:14,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:18:14,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:18:14,158 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2019-12-07 14:18:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:14,228 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2019-12-07 14:18:14,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:18:14,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-12-07 14:18:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:14,230 INFO L225 Difference]: With dead ends: 63 [2019-12-07 14:18:14,230 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 14:18:14,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:18:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 14:18:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-07 14:18:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 14:18:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-12-07 14:18:14,234 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2019-12-07 14:18:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:14,234 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-12-07 14:18:14,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:18:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-12-07 14:18:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 14:18:14,235 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:14,235 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:14,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:14,436 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1490131379, now seen corresponding path program 1 times [2019-12-07 14:18:14,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:14,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099770821] [2019-12-07 14:18:14,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:14,469 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:14,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890350861] [2019-12-07 14:18:14,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:18:14,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 14:18:14,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:18:14,517 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 14:18:14,517 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:18:14,521 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:18:14,521 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:18:14,521 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 14:18:14,530 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 14:18:14,531 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:18:14,537 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:18:14,537 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:18:14,537 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-12-07 14:18:14,585 INFO L343 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-12-07 14:18:14,586 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 62 [2019-12-07 14:18:14,587 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:18:14,604 INFO L614 ElimStorePlain]: treesize reduction 32, result has 53.6 percent of original size [2019-12-07 14:18:14,605 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:18:14,605 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2019-12-07 14:18:14,667 INFO L343 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-12-07 14:18:14,667 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 71 [2019-12-07 14:18:14,668 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:18:14,690 INFO L614 ElimStorePlain]: treesize reduction 51, result has 48.0 percent of original size [2019-12-07 14:18:14,691 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:18:14,691 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:47 [2019-12-07 14:18:14,775 INFO L343 Elim1Store]: treesize reduction 39, result has 45.8 percent of original size [2019-12-07 14:18:14,776 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 85 [2019-12-07 14:18:14,778 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:18:14,805 INFO L614 ElimStorePlain]: treesize reduction 59, result has 50.8 percent of original size [2019-12-07 14:18:14,805 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 14:18:14,806 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:61 [2019-12-07 14:18:14,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:18:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:18:14,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099770821] [2019-12-07 14:18:14,937 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:18:14,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890350861] [2019-12-07 14:18:14,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:18:14,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-12-07 14:18:14,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568364042] [2019-12-07 14:18:14,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 14:18:14,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 14:18:14,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:18:14,939 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 13 states. [2019-12-07 14:18:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:15,347 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-12-07 14:18:15,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 14:18:15,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2019-12-07 14:18:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:15,348 INFO L225 Difference]: With dead ends: 59 [2019-12-07 14:18:15,348 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 14:18:15,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-12-07 14:18:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 14:18:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2019-12-07 14:18:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 14:18:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-12-07 14:18:15,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2019-12-07 14:18:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:15,353 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-12-07 14:18:15,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 14:18:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-12-07 14:18:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 14:18:15,353 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:15,353 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:15,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:15,555 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash 119837417, now seen corresponding path program 2 times [2019-12-07 14:18:15,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:15,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799348961] [2019-12-07 14:18:15,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:15,586 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:15,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487544704] [2019-12-07 14:18:15,587 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:15,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:18:15,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:18:15,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 14:18:15,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:18:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 14:18:15,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799348961] [2019-12-07 14:18:15,668 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:18:15,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487544704] [2019-12-07 14:18:15,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:18:15,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-12-07 14:18:15,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165303576] [2019-12-07 14:18:15,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 14:18:15,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:18:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 14:18:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:18:15,669 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 9 states. [2019-12-07 14:18:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:18:15,770 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2019-12-07 14:18:15,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:18:15,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-12-07 14:18:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:18:15,771 INFO L225 Difference]: With dead ends: 84 [2019-12-07 14:18:15,771 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 14:18:15,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:18:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 14:18:15,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2019-12-07 14:18:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 14:18:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-12-07 14:18:15,776 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-12-07 14:18:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:18:15,776 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-12-07 14:18:15,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 14:18:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-12-07 14:18:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 14:18:15,777 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:18:15,777 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:18:15,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:15,978 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:18:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:18:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1383270612, now seen corresponding path program 3 times [2019-12-07 14:18:15,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:18:15,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854918352] [2019-12-07 14:18:15,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:18:16,015 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:18:16,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582576777] [2019-12-07 14:18:16,016 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:16,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 14:18:16,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-12-07 14:18:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:18:16,095 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:18:16,096 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 14:18:16,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:18:16,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:18:16 BoogieIcfgContainer [2019-12-07 14:18:16,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:18:16,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:18:16,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:18:16,359 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:18:16,359 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:18:12" (3/4) ... [2019-12-07 14:18:16,361 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 14:18:16,397 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5e1e3f11-8214-47c7-b3ed-515f58b7c6ca/bin/uautomizer/witness.graphml [2019-12-07 14:18:16,397 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:18:16,398 INFO L168 Benchmark]: Toolchain (without parser) took 4299.06 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 936.6 MB in the beginning and 947.4 MB in the end (delta: -10.8 MB). Peak memory consumption was 88.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:18:16,398 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:18:16,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.33 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -160.0 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-12-07 14:18:16,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:18:16,399 INFO L168 Benchmark]: Boogie Preprocessor took 16.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:18:16,400 INFO L168 Benchmark]: RCFGBuilder took 173.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2019-12-07 14:18:16,400 INFO L168 Benchmark]: TraceAbstraction took 3856.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 952.0 MB in the end (delta: 120.7 MB). Peak memory consumption was 120.7 MB. Max. memory is 11.5 GB. [2019-12-07 14:18:16,400 INFO L168 Benchmark]: Witness Printer took 38.52 ms. Allocated memory is still 1.1 GB. Free memory was 952.0 MB in the beginning and 947.4 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. [2019-12-07 14:18:16,402 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 187.33 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -160.0 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 173.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3856.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 952.0 MB in the end (delta: 120.7 MB). Peak memory consumption was 120.7 MB. Max. memory is 11.5 GB. * Witness Printer took 38.52 ms. Allocated memory is still 1.1 GB. Free memory was 952.0 MB in the beginning and 947.4 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] i=0 VAL [N=3] [L26] COND TRUE i