./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/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 2c6480746379e4e7ce6d546f9a1318408c455414 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:52:11,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:52:11,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:52:11,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:52:11,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:52:11,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:52:11,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:52:11,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:52:11,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:52:11,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:52:11,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:52:11,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:52:11,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:52:11,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:52:11,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:52:11,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:52:11,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:52:11,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:52:11,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:52:11,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:52:11,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:52:11,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:52:11,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:52:11,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:52:11,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:52:11,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:52:11,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:52:11,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:52:11,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:52:11,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:52:11,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:52:11,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:52:11,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:52:11,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:52:11,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:52:11,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:52:11,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:52:11,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:52:11,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:52:11,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:52:11,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:52:11,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:52:11,511 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:52:11,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:52:11,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:52:11,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:52:11,513 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:52:11,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:52:11,513 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:52:11,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:52:11,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:52:11,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:52:11,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:52:11,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:52:11,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:52:11,514 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:52:11,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:52:11,515 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:52:11,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:52:11,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:52:11,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:52:11,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:52:11,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:52:11,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:52:11,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:52:11,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:52:11,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:52:11,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:52:11,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:52:11,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:52:11,517 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_de4d2036-95a6-42fe-8f2e-b77b8979f992/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 -> 2c6480746379e4e7ce6d546f9a1318408c455414 [2019-11-25 08:52:11,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:52:11,695 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:52:11,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:52:11,699 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:52:11,699 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:52:11,700 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/../../sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-25 08:52:11,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/data/15288e5ed/d39a5c5da2504db588d3cffe691cd956/FLAG9f1123b7a [2019-11-25 08:52:12,161 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:52:12,162 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-25 08:52:12,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/data/15288e5ed/d39a5c5da2504db588d3cffe691cd956/FLAG9f1123b7a [2019-11-25 08:52:12,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/data/15288e5ed/d39a5c5da2504db588d3cffe691cd956 [2019-11-25 08:52:12,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:52:12,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:52:12,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:12,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:52:12,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:52:12,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ceea44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12, skipping insertion in model container [2019-11-25 08:52:12,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:52:12,218 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:52:12,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:12,529 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:52:12,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:12,575 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:52:12,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12 WrapperNode [2019-11-25 08:52:12,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:12,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:12,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:52:12,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:52:12,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:12,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:52:12,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:52:12,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:52:12,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... [2019-11-25 08:52:12,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:52:12,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:52:12,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:52:12,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:52:12,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:52:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:52:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:52:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:52:12,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:52:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:52:12,916 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:52:12,916 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-25 08:52:12,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:12 BoogieIcfgContainer [2019-11-25 08:52:12,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:52:12,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:52:12,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:52:12,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:52:12,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:52:12" (1/3) ... [2019-11-25 08:52:12,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1be4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:12, skipping insertion in model container [2019-11-25 08:52:12,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:12" (2/3) ... [2019-11-25 08:52:12,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1be4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:12, skipping insertion in model container [2019-11-25 08:52:12,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:12" (3/3) ... [2019-11-25 08:52:12,924 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2019-11-25 08:52:12,932 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:52:12,937 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:52:12,946 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:52:12,966 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:52:12,967 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:52:12,967 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:52:12,967 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:52:12,967 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:52:12,967 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:52:12,967 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:52:12,967 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:52:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-25 08:52:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:52:12,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:12,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:12,986 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-11-25 08:52:12,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:12,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531088080] [2019-11-25 08:52:12,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:13,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531088080] [2019-11-25 08:52:13,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:13,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:52:13,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301125874] [2019-11-25 08:52:13,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:52:13,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:52:13,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:52:13,149 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-25 08:52:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:13,162 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-25 08:52:13,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:52:13,163 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-25 08:52:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:13,169 INFO L225 Difference]: With dead ends: 33 [2019-11-25 08:52:13,170 INFO L226 Difference]: Without dead ends: 15 [2019-11-25 08:52:13,172 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 [2019-11-25 08:52:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-25 08:52:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-25 08:52:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-25 08:52:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-25 08:52:13,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-25 08:52:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:13,202 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-25 08:52:13,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:52:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-25 08:52:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:52:13,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:13,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:13,204 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-11-25 08:52:13,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:13,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669491570] [2019-11-25 08:52:13,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:13,223 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:13,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476012895] [2019-11-25 08:52:13,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:13,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:52:13,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:13,392 INFO L343 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2019-11-25 08:52:13,393 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 1 case distinctions, treesize of input 27 treesize of output 15 [2019-11-25 08:52:13,393 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:13,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:13,409 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:13,410 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2019-11-25 08:52:13,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:13,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669491570] [2019-11-25 08:52:13,469 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:52:13,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476012895] [2019-11-25 08:52:13,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:13,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:52:13,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942645985] [2019-11-25 08:52:13,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:13,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:13,472 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-25 08:52:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:13,571 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-25 08:52:13,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:52:13,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-25 08:52:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:13,573 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:52:13,574 INFO L226 Difference]: Without dead ends: 30 [2019-11-25 08:52:13,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-25 08:52:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2019-11-25 08:52:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-25 08:52:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-25 08:52:13,580 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2019-11-25 08:52:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:13,580 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-25 08:52:13,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-25 08:52:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-25 08:52:13,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:13,581 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:13,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:13,782 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash 130601367, now seen corresponding path program 1 times [2019-11-25 08:52:13,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:13,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014072311] [2019-11-25 08:52:13,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:13,811 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:13,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788490526] [2019-11-25 08:52:13,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:13,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:52:13,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:13,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014072311] [2019-11-25 08:52:13,885 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:52:13,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788490526] [2019-11-25 08:52:13,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:13,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:52:13,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714213149] [2019-11-25 08:52:13,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:13,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:13,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:13,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:13,887 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-11-25 08:52:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:13,973 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-25 08:52:13,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:52:13,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-25 08:52:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:13,974 INFO L225 Difference]: With dead ends: 47 [2019-11-25 08:52:13,974 INFO L226 Difference]: Without dead ends: 38 [2019-11-25 08:52:13,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-25 08:52:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-11-25 08:52:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-25 08:52:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-25 08:52:13,979 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-25 08:52:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:13,980 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-25 08:52:13,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-25 08:52:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-25 08:52:13,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:13,981 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:14,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:14,181 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:14,182 INFO L82 PathProgramCache]: Analyzing trace with hash 827904471, now seen corresponding path program 1 times [2019-11-25 08:52:14,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:14,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464326374] [2019-11-25 08:52:14,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:14,191 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:14,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198107155] [2019-11-25 08:52:14,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:14,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:52:14,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:14,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464326374] [2019-11-25 08:52:14,270 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:52:14,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198107155] [2019-11-25 08:52:14,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:52:14,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-25 08:52:14,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260576620] [2019-11-25 08:52:14,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:14,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:14,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:14,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:14,271 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-11-25 08:52:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:14,347 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-25 08:52:14,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:52:14,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-25 08:52:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:14,348 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:52:14,348 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:52:14,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:52:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2019-11-25 08:52:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-25 08:52:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-25 08:52:14,353 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-25 08:52:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:14,354 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-25 08:52:14,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-25 08:52:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:52:14,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:14,355 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:14,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:14,556 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash 437833903, now seen corresponding path program 1 times [2019-11-25 08:52:14,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:14,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245238719] [2019-11-25 08:52:14,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:14,570 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:14,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856734890] [2019-11-25 08:52:14,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:14,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:52:14,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:14,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245238719] [2019-11-25 08:52:14,656 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:52:14,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856734890] [2019-11-25 08:52:14,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:14,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-25 08:52:14,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456424709] [2019-11-25 08:52:14,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:52:14,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:52:14,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:14,658 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-25 08:52:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:14,746 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-25 08:52:14,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:52:14,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-25 08:52:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:14,750 INFO L225 Difference]: With dead ends: 39 [2019-11-25 08:52:14,750 INFO L226 Difference]: Without dead ends: 25 [2019-11-25 08:52:14,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:52:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-25 08:52:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2019-11-25 08:52:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:52:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-25 08:52:14,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-25 08:52:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:14,754 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-25 08:52:14,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:52:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-25 08:52:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:52:14,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:14,754 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:14,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:14,955 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1602337035, now seen corresponding path program 1 times [2019-11-25 08:52:14,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:14,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120111474] [2019-11-25 08:52:14,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:14,977 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:14,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298506941] [2019-11-25 08:52:14,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:52:15,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:15,037 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 [2019-11-25 08:52:15,037 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:15,042 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:15,047 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 27 treesize of output 15 [2019-11-25 08:52:15,047 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:15,054 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:15,054 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:15,054 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2019-11-25 08:52:15,127 INFO L343 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-11-25 08:52:15,128 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 72 [2019-11-25 08:52:15,129 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:15,165 INFO L567 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2019-11-25 08:52:15,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:15,167 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:15,168 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2019-11-25 08:52:15,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:15,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:15,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:15,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:15,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:15,295 INFO L392 ElimStorePlain]: Different costs {12=[|v_#memory_int_12|], 20=[v_prenex_4]} [2019-11-25 08:52:15,306 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:15,314 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-25 08:52:15,315 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2019-11-25 08:52:15,316 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:15,349 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:15,359 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:15,388 INFO L343 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-11-25 08:52:15,388 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 89 [2019-11-25 08:52:15,390 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:15,461 INFO L567 ElimStorePlain]: treesize reduction 51, result has 69.3 percent of original size [2019-11-25 08:52:15,462 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-11-25 08:52:15,463 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:115 [2019-11-25 08:52:15,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:15,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120111474] [2019-11-25 08:52:15,589 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:52:15,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298506941] [2019-11-25 08:52:15,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:52:15,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-25 08:52:15,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799826890] [2019-11-25 08:52:15,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:52:15,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:15,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:52:15,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:52:15,591 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2019-11-25 08:52:15,823 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2019-11-25 08:52:16,300 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2019-11-25 08:52:16,466 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-11-25 08:52:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:16,500 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-25 08:52:16,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:52:16,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-25 08:52:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:16,503 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:52:16,503 INFO L226 Difference]: Without dead ends: 40 [2019-11-25 08:52:16,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:52:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-25 08:52:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2019-11-25 08:52:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:52:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-25 08:52:16,510 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2019-11-25 08:52:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:16,510 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-25 08:52:16,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:52:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-25 08:52:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:52:16,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:16,511 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:16,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:16,711 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:16,712 INFO L82 PathProgramCache]: Analyzing trace with hash -602215277, now seen corresponding path program 2 times [2019-11-25 08:52:16,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:16,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941984263] [2019-11-25 08:52:16,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:16,724 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:16,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045698295] [2019-11-25 08:52:16,725 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:16,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:16,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:16,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:52:16,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:16,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941984263] [2019-11-25 08:52:16,820 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:52:16,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045698295] [2019-11-25 08:52:16,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:52:16,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-25 08:52:16,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151983514] [2019-11-25 08:52:16,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:52:16,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:52:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:16,822 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-25 08:52:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:16,953 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2019-11-25 08:52:16,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:52:16,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-25 08:52:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:16,957 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:52:16,957 INFO L226 Difference]: Without dead ends: 50 [2019-11-25 08:52:16,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:52:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-25 08:52:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2019-11-25 08:52:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:52:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-25 08:52:16,962 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2019-11-25 08:52:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:16,962 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-25 08:52:16,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:52:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-25 08:52:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:52:16,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:16,963 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:17,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:17,163 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash -508830509, now seen corresponding path program 3 times [2019-11-25 08:52:17,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:17,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521998927] [2019-11-25 08:52:17,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:17,183 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:17,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703203044] [2019-11-25 08:52:17,183 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:17,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-25 08:52:17,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:17,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:52:17,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:17,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521998927] [2019-11-25 08:52:17,260 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:52:17,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703203044] [2019-11-25 08:52:17,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:52:17,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-25 08:52:17,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130122061] [2019-11-25 08:52:17,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:52:17,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:17,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:52:17,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:17,262 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-11-25 08:52:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:17,376 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-25 08:52:17,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:52:17,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-25 08:52:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:17,377 INFO L225 Difference]: With dead ends: 54 [2019-11-25 08:52:17,377 INFO L226 Difference]: Without dead ends: 47 [2019-11-25 08:52:17,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-25 08:52:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-25 08:52:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:52:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-25 08:52:17,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2019-11-25 08:52:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:17,384 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-25 08:52:17,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:52:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-25 08:52:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:52:17,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:17,385 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:17,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:17,588 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash 575675563, now seen corresponding path program 1 times [2019-11-25 08:52:17,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:17,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083422995] [2019-11-25 08:52:17,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:17,599 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:52:17,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038349682] [2019-11-25 08:52:17,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:17,683 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:17,683 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:52:17,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:17,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:52:17 BoogieIcfgContainer [2019-11-25 08:52:17,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:52:17,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:52:17,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:52:17,913 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:52:17,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:12" (3/4) ... [2019-11-25 08:52:17,915 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:52:17,969 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_de4d2036-95a6-42fe-8f2e-b77b8979f992/bin/uautomizer/witness.graphml [2019-11-25 08:52:17,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:52:17,970 INFO L168 Benchmark]: Toolchain (without parser) took 5785.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -111.5 MB). Peak memory consumption was 80.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:17,971 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:17,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -235.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:17,972 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:17,972 INFO L168 Benchmark]: Boogie Preprocessor took 26.50 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:17,973 INFO L168 Benchmark]: RCFGBuilder took 270.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:17,973 INFO L168 Benchmark]: TraceAbstraction took 4994.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 98.9 MB). Peak memory consumption was 98.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:17,974 INFO L168 Benchmark]: Witness Printer took 56.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:17,983 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 387.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -235.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.50 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 270.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4994.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 98.9 MB). Peak memory consumption was 98.9 MB. Max. memory is 11.5 GB. * Witness Printer took 56.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 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] a[0] = 1 [L27] b[0] = 1 [L28] i=1 VAL [N=2] [L28] COND TRUE i