./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.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_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 6cd948af0e0b6c8603db03ff6e3dfbac759cb557 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 17:15:54,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:15:54,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:15:54,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:15:54,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:15:54,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:15:54,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:15:54,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:15:54,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:15:54,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:15:54,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:15:54,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:15:54,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:15:54,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:15:54,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:15:54,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:15:54,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:15:54,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:15:54,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:15:54,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:15:54,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:15:54,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:15:54,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:15:54,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:15:54,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:15:54,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:15:54,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:15:54,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:15:54,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:15:54,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:15:54,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:15:54,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:15:54,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:15:54,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:15:54,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:15:54,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:15:54,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:15:54,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:15:54,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:15:54,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:15:54,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:15:54,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:15:54,151 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:15:54,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:15:54,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:15:54,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:15:54,152 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:15:54,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:15:54,153 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:15:54,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:15:54,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:15:54,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:15:54,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:15:54,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:15:54,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:15:54,154 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:15:54,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:15:54,154 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:15:54,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:15:54,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:15:54,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:15:54,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:15:54,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:15:54,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:15:54,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:15:54,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:15:54,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:15:54,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:15:54,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:15:54,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:15:54,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:15:54,156 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_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 -> 6cd948af0e0b6c8603db03ff6e3dfbac759cb557 [2019-12-07 17:15:54,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:15:54,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:15:54,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:15:54,267 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:15:54,268 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:15:54,268 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2019-12-07 17:15:54,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/data/c83ad4b11/af60b69492764f7b9970e3faf14647cf/FLAG4f5553142 [2019-12-07 17:15:54,686 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:15:54,687 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2019-12-07 17:15:54,690 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/data/c83ad4b11/af60b69492764f7b9970e3faf14647cf/FLAG4f5553142 [2019-12-07 17:15:55,085 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/data/c83ad4b11/af60b69492764f7b9970e3faf14647cf [2019-12-07 17:15:55,087 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:15:55,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:15:55,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:15:55,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:15:55,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:15:55,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1d1bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55, skipping insertion in model container [2019-12-07 17:15:55,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:15:55,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:15:55,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:15:55,208 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:15:55,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:15:55,257 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:15:55,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55 WrapperNode [2019-12-07 17:15:55,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:15:55,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:15:55,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:15:55,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:15:55,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:15:55,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:15:55,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:15:55,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:15:55,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... [2019-12-07 17:15:55,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:15:55,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:15:55,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:15:55,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:15:55,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:15:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:15:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:15:55,426 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:15:55,427 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 17:15:55,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:55 BoogieIcfgContainer [2019-12-07 17:15:55,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:15:55,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:15:55,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:15:55,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:15:55,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:15:55" (1/3) ... [2019-12-07 17:15:55,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ebbc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:15:55, skipping insertion in model container [2019-12-07 17:15:55,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:55" (2/3) ... [2019-12-07 17:15:55,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ebbc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:15:55, skipping insertion in model container [2019-12-07 17:15:55,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:55" (3/3) ... [2019-12-07 17:15:55,432 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2019-12-07 17:15:55,438 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:15:55,442 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:15:55,449 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:15:55,463 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:15:55,463 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:15:55,463 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:15:55,463 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:15:55,463 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:15:55,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:15:55,464 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:15:55,464 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:15:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-12-07 17:15:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 17:15:55,475 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:55,476 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 17:15:55,476 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-12-07 17:15:55,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:55,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512570258] [2019-12-07 17:15:55,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:55,606 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 17:15:55,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512570258] [2019-12-07 17:15:55,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:55,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:15:55,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021551499] [2019-12-07 17:15:55,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:15:55,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:15:55,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:15:55,621 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-12-07 17:15:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:55,637 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-12-07 17:15:55,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:15:55,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 17:15:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:55,644 INFO L225 Difference]: With dead ends: 17 [2019-12-07 17:15:55,644 INFO L226 Difference]: Without dead ends: 7 [2019-12-07 17:15:55,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:15:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-12-07 17:15:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 17:15:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 17:15:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-12-07 17:15:55,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-12-07 17:15:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:55,669 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-12-07 17:15:55,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:15:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-12-07 17:15:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 17:15:55,670 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:55,670 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 17:15:55,670 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-12-07 17:15:55,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:55,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59986787] [2019-12-07 17:15:55,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:55,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59986787] [2019-12-07 17:15:55,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636429113] [2019-12-07 17:15:55,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:15:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:55,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 17:15:55,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:15:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:55,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:15:55,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-12-07 17:15:55,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394159620] [2019-12-07 17:15:55,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 17:15:55,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 17:15:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:15:55,783 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-12-07 17:15:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:55,795 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-12-07 17:15:55,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:15:55,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 17:15:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:55,796 INFO L225 Difference]: With dead ends: 12 [2019-12-07 17:15:55,796 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 17:15:55,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:15:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 17:15:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 17:15:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 17:15:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-12-07 17:15:55,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-12-07 17:15:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:55,800 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-12-07 17:15:55,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 17:15:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-12-07 17:15:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 17:15:55,800 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:55,800 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-12-07 17:15:56,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:15:56,002 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-12-07 17:15:56,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:56,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356340992] [2019-12-07 17:15:56,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:56,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356340992] [2019-12-07 17:15:56,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372966295] [2019-12-07 17:15:56,079 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:15:56,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:15:56,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:15:56,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 17:15:56,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:15:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:56,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:15:56,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 17:15:56,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185709739] [2019-12-07 17:15:56,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 17:15:56,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:56,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 17:15:56,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:15:56,113 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-12-07 17:15:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:56,128 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-12-07 17:15:56,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:15:56,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-12-07 17:15:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:56,129 INFO L225 Difference]: With dead ends: 13 [2019-12-07 17:15:56,129 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 17:15:56,129 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:15:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 17:15:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 17:15:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 17:15:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-12-07 17:15:56,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-12-07 17:15:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:56,131 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-12-07 17:15:56,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 17:15:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-12-07 17:15:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 17:15:56,132 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:56,132 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-12-07 17:15:56,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:15:56,333 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-12-07 17:15:56,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:56,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055720748] [2019-12-07 17:15:56,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:56,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055720748] [2019-12-07 17:15:56,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100627939] [2019-12-07 17:15:56,422 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:15:56,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 17:15:56,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:15:56,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 17:15:56,442 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:15:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:56,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:15:56,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 17:15:56,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506317939] [2019-12-07 17:15:56,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 17:15:56,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 17:15:56,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:15:56,456 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2019-12-07 17:15:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:56,476 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-12-07 17:15:56,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 17:15:56,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-12-07 17:15:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:56,476 INFO L225 Difference]: With dead ends: 14 [2019-12-07 17:15:56,477 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 17:15:56,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:15:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 17:15:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 17:15:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 17:15:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-12-07 17:15:56,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-12-07 17:15:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:56,479 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-12-07 17:15:56,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 17:15:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-12-07 17:15:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:15:56,480 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:56,480 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-12-07 17:15:56,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:15:56,681 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2019-12-07 17:15:56,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:56,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499996302] [2019-12-07 17:15:56,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:56,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499996302] [2019-12-07 17:15:56,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85219625] [2019-12-07 17:15:56,771 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:15:56,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:15:56,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:15:56,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 17:15:56,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:15:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:56,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:15:56,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 17:15:56,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301094304] [2019-12-07 17:15:56,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 17:15:56,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 17:15:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 17:15:56,809 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-12-07 17:15:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:56,836 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-12-07 17:15:56,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 17:15:56,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-12-07 17:15:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:56,837 INFO L225 Difference]: With dead ends: 15 [2019-12-07 17:15:56,837 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 17:15:56,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 17:15:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 17:15:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 17:15:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 17:15:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-12-07 17:15:56,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-12-07 17:15:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:56,841 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-12-07 17:15:56,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 17:15:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-12-07 17:15:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 17:15:56,842 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:56,842 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-12-07 17:15:57,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:15:57,043 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2019-12-07 17:15:57,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:57,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87178545] [2019-12-07 17:15:57,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:57,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87178545] [2019-12-07 17:15:57,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577379083] [2019-12-07 17:15:57,122 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:15:57,145 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 17:15:57,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:15:57,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 17:15:57,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:15:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:57,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:15:57,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 17:15:57,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134902937] [2019-12-07 17:15:57,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 17:15:57,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:57,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 17:15:57,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 17:15:57,165 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2019-12-07 17:15:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:57,192 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-12-07 17:15:57,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 17:15:57,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2019-12-07 17:15:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:57,193 INFO L225 Difference]: With dead ends: 16 [2019-12-07 17:15:57,193 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 17:15:57,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 17:15:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 17:15:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 17:15:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 17:15:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-12-07 17:15:57,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-12-07 17:15:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:57,195 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-12-07 17:15:57,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 17:15:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-12-07 17:15:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 17:15:57,196 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:57,196 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-12-07 17:15:57,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:15:57,397 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:57,398 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2019-12-07 17:15:57,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:57,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866507323] [2019-12-07 17:15:57,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:59,581 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 12 [2019-12-07 17:16:01,590 WARN L838 $PredicateComparison]: unable to prove that (<= (* 536870912 (div (+ (* c_ULTIMATE.start_main_~y~0 178956971) 715827879) 536870912)) (+ (* 178956971 c_ULTIMATE.start_main_~y~0) 178956968)) is different from false [2019-12-07 17:16:04,843 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 12 [2019-12-07 17:16:08,709 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2019-12-07 17:16:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2019-12-07 17:16:12,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866507323] [2019-12-07 17:16:12,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215261298] [2019-12-07 17:16:12,743 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:16:12,766 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-07 17:16:12,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:16:12,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 17:16:12,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:16:26,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:16:26,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:17:08,907 WARN L192 SmtUtils]: Spent 19.03 s on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2019-12-07 17:17:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:17:09,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:17:09,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-12-07 17:17:09,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528608503] [2019-12-07 17:17:09,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 17:17:09,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:17:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 17:17:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=183, Unknown=17, NotChecked=28, Total=272 [2019-12-07 17:17:09,010 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 17 states. [2019-12-07 17:17:33,002 WARN L192 SmtUtils]: Spent 22.59 s on a formula simplification that was a NOOP. DAG size: 58 [2019-12-07 17:17:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:17:38,842 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-12-07 17:17:38,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 17:17:38,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 11 [2019-12-07 17:17:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:17:38,843 INFO L225 Difference]: With dead ends: 20 [2019-12-07 17:17:38,843 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 17:17:38,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 98.0s TimeCoverageRelationStatistics Valid=55, Invalid=237, Unknown=18, NotChecked=32, Total=342 [2019-12-07 17:17:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 17:17:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 17:17:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 17:17:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-12-07 17:17:38,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-12-07 17:17:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:17:38,846 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-12-07 17:17:38,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 17:17:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-12-07 17:17:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 17:17:38,846 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:17:38,846 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1] [2019-12-07 17:17:39,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:17:39,048 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:17:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:17:39,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1966493384, now seen corresponding path program 7 times [2019-12-07 17:17:39,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:17:39,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333464973] [2019-12-07 17:17:39,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:17:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:17:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:17:39,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333464973] [2019-12-07 17:17:39,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567152596] [2019-12-07 17:17:39,142 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/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 17:17:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:17:39,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 17:17:39,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:17:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:17:39,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:17:39,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 17:17:39,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509618877] [2019-12-07 17:17:39,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 17:17:39,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:17:39,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 17:17:39,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:17:39,181 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-12-07 17:17:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:17:39,216 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-12-07 17:17:39,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 17:17:39,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-07 17:17:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:17:39,217 INFO L225 Difference]: With dead ends: 14 [2019-12-07 17:17:39,217 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 17:17:39,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:17:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 17:17:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 17:17:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 17:17:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 17:17:39,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2019-12-07 17:17:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:17:39,218 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 17:17:39,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 17:17:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 17:17:39,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 17:17:39,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:17:39,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 17:17:39,601 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-12-07 17:17:39,603 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 17:17:39,604 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 17:17:39,604 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 17:17:39,604 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 17:17:39,604 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 17:17:39,604 INFO L242 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (let ((.cse10 (div (- ULTIMATE.start_main_~y~0) (- 2)))) (let ((.cse4 (div (- .cse10) (- 2)))) (let ((.cse3 (div (- .cse4) (- 2)))) (let ((.cse9 (div (- .cse3) (- 2)))) (let ((.cse1 (= (mod .cse4 (- 2)) 0)) (.cse2 (= 0 (mod .cse10 (- 2)))) (.cse7 (= (mod .cse3 (- 2)) 0)) (.cse6 (div (- .cse9) (- 2))) (.cse8 (= 0 (mod .cse9 (- 2)))) (.cse0 (= 0 (mod ULTIMATE.start_main_~y~0 (- 2))))) (or (and (<= ULTIMATE.start_main_~x~0 3) .cse0 .cse1 .cse2 (<= 1 .cse3) (<= 3 ULTIMATE.start_main_~x~0) (<= .cse3 1)) (and (<= ULTIMATE.start_main_~y~0 1) (<= ULTIMATE.start_main_~x~0 0) (<= 1 ULTIMATE.start_main_~y~0) (<= 0 ULTIMATE.start_main_~x~0)) (and .cse0 (<= 1 .cse4) .cse2 (<= .cse4 1) (<= ULTIMATE.start_main_~x~0 2) (<= 2 ULTIMATE.start_main_~x~0)) (let ((.cse5 (div (- .cse6) (- 2)))) (and (<= 6 ULTIMATE.start_main_~x~0) .cse0 .cse1 .cse2 (<= .cse5 1) (<= 1 .cse5) (= 0 (mod .cse6 (- 2))) .cse7 .cse8 (<= ULTIMATE.start_main_~x~0 6))) (and .cse0 (<= ULTIMATE.start_main_~x~0 4) .cse1 .cse2 (<= 4 ULTIMATE.start_main_~x~0) (<= .cse9 1) (<= 1 .cse9) .cse7) (and .cse0 (<= .cse6 1) .cse1 .cse2 (<= 5 ULTIMATE.start_main_~x~0) .cse7 (<= 1 .cse6) (<= ULTIMATE.start_main_~x~0 5) .cse8) (and .cse0 (<= 1 ULTIMATE.start_main_~x~0) (<= .cse10 1) (<= 1 .cse10) (<= ULTIMATE.start_main_~x~0 1)))))))) [2019-12-07 17:17:39,604 INFO L246 CegarLoopResult]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2019-12-07 17:17:39,604 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-12-07 17:17:39,604 INFO L249 CegarLoopResult]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2019-12-07 17:17:39,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:17:39 BoogieIcfgContainer [2019-12-07 17:17:39,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:17:39,621 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:17:39,621 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:17:39,621 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:17:39,621 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:55" (3/4) ... [2019-12-07 17:17:39,623 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 17:17:39,629 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 17:17:39,629 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 17:17:39,654 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b0b4f268-acdd-4535-9393-80ea4d57dc58/bin/uautomizer/witness.graphml [2019-12-07 17:17:39,655 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:17:39,656 INFO L168 Benchmark]: Toolchain (without parser) took 104567.80 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 946.2 MB in the beginning and 979.5 MB in the end (delta: -33.3 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. [2019-12-07 17:17:39,656 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:17:39,656 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.59 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -142.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 17:17:39,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.55 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: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:17:39,657 INFO L168 Benchmark]: Boogie Preprocessor took 11.45 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:17:39,657 INFO L168 Benchmark]: RCFGBuilder took 137.64 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:17:39,657 INFO L168 Benchmark]: TraceAbstraction took 104192.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 981.3 MB in the end (delta: 89.4 MB). Peak memory consumption was 89.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:17:39,657 INFO L168 Benchmark]: Witness Printer took 34.15 ms. Allocated memory is still 1.1 GB. Free memory was 981.3 MB in the beginning and 979.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:17:39,659 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.59 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -142.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.55 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: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.45 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 137.64 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 104192.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 981.3 MB in the end (delta: 89.4 MB). Peak memory consumption was 89.4 MB. Max. memory is 11.5 GB. * Witness Printer took 34.15 ms. Allocated memory is still 1.1 GB. Free memory was 981.3 MB in the beginning and 979.5 MB 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: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((((((((x <= 3 && 0 == y % -2) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && 1 <= -(-(-y / -2) / -2) / -2) && 3 <= x) && -(-(-y / -2) / -2) / -2 <= 1) || (((y <= 1 && x <= 0) && 1 <= y) && 0 <= x)) || (((((0 == y % -2 && 1 <= -(-y / -2) / -2) && 0 == -y / -2 % -2) && -(-y / -2) / -2 <= 1) && x <= 2) && 2 <= x)) || (((((((((6 <= x && 0 == y % -2) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && -(-(-(-(-(-y / -2) / -2) / -2) / -2) / -2) / -2 <= 1) && 1 <= -(-(-(-(-(-y / -2) / -2) / -2) / -2) / -2) / -2) && 0 == -(-(-(-(-y / -2) / -2) / -2) / -2) / -2 % -2) && -(-(-y / -2) / -2) / -2 % -2 == 0) && 0 == -(-(-(-y / -2) / -2) / -2) / -2 % -2) && x <= 6)) || (((((((0 == y % -2 && x <= 4) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && 4 <= x) && -(-(-(-y / -2) / -2) / -2) / -2 <= 1) && 1 <= -(-(-(-y / -2) / -2) / -2) / -2) && -(-(-y / -2) / -2) / -2 % -2 == 0)) || ((((((((0 == y % -2 && -(-(-(-(-y / -2) / -2) / -2) / -2) / -2 <= 1) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && 5 <= x) && -(-(-y / -2) / -2) / -2 % -2 == 0) && 1 <= -(-(-(-(-y / -2) / -2) / -2) / -2) / -2) && x <= 5) && 0 == -(-(-(-y / -2) / -2) / -2) / -2 % -2)) || ((((0 == y % -2 && 1 <= x) && -y / -2 <= 1) && 1 <= -y / -2) && x <= 1) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 103.9s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 30.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 38 SDtfs, 2 SDslu, 100 SDs, 0 SdLazy, 266 SolverSat, 22 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 98.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 429 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 72.0s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 118 ConstructedInterpolants, 1 QuantifiedInterpolants, 16730 SizeOfPredicates, 8 NumberOfNonLiveVariables, 243 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 30/184 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...