./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcompf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:02:51,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:02:51,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:02:51,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:02:51,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:02:51,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:02:51,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:02:51,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:02:51,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:02:51,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:02:51,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:02:51,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:02:51,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:02:51,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:02:51,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:02:51,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:02:51,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:02:51,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:02:51,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:02:51,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:02:51,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:02:51,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:02:51,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:02:51,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:02:51,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:02:51,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:02:51,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:02:51,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:02:51,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:02:51,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:02:51,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:02:51,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:02:51,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:02:51,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:02:51,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:02:51,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:02:51,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:02:51,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:02:51,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:02:51,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:02:51,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:02:51,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:02:51,362 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:02:51,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:02:51,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:02:51,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:02:51,364 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:02:51,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:02:51,365 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:02:51,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:02:51,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:02:51,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:02:51,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:02:51,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:02:51,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:02:51,368 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:02:51,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:02:51,368 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:02:51,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:02:51,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:02:51,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:02:51,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:02:51,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:02:51,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:02:51,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:02:51,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:02:51,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:02:51,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:02:51,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:02:51,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:02:51,371 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_af40cd84-5137-4de3-8c1d-af8c9c237352/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 -> de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 [2019-11-16 00:02:51,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:02:51,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:02:51,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:02:51,456 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:02:51,457 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:02:51,457 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifcompf.c [2019-11-16 00:02:51,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/data/a96e6ee29/6d9856b5d2224b079b518b61cfdea074/FLAG2f4bb616d [2019-11-16 00:02:52,036 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:02:52,037 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/sv-benchmarks/c/array-fpi/ifcompf.c [2019-11-16 00:02:52,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/data/a96e6ee29/6d9856b5d2224b079b518b61cfdea074/FLAG2f4bb616d [2019-11-16 00:02:52,339 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/data/a96e6ee29/6d9856b5d2224b079b518b61cfdea074 [2019-11-16 00:02:52,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:02:52,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:02:52,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:02:52,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:02:52,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:02:52,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24acb9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52, skipping insertion in model container [2019-11-16 00:02:52,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,361 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:02:52,386 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:02:52,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:02:52,656 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:02:52,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:02:52,700 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:02:52,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52 WrapperNode [2019-11-16 00:02:52,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:02:52,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:02:52,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:02:52,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:02:52,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:02:52,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:02:52,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:02:52,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:02:52,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... [2019-11-16 00:02:52,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:02:52,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:02:52,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:02:52,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:02:52,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-16 00:02:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-16 00:02:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:02:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:02:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-16 00:02:53,158 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:02:53,158 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-16 00:02:53,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:53 BoogieIcfgContainer [2019-11-16 00:02:53,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:02:53,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:02:53,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:02:53,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:02:53,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:02:52" (1/3) ... [2019-11-16 00:02:53,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fffc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:53, skipping insertion in model container [2019-11-16 00:02:53,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:52" (2/3) ... [2019-11-16 00:02:53,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fffc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:53, skipping insertion in model container [2019-11-16 00:02:53,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:53" (3/3) ... [2019-11-16 00:02:53,168 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2019-11-16 00:02:53,179 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:02:53,188 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:02:53,217 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:02:53,245 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:02:53,245 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:02:53,257 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:02:53,257 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:02:53,257 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:02:53,258 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:02:53,258 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:02:53,258 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:02:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-16 00:02:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:02:53,281 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:53,282 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:53,284 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:53,291 INFO L82 PathProgramCache]: Analyzing trace with hash 638964938, now seen corresponding path program 1 times [2019-11-16 00:02:53,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:53,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188309794] [2019-11-16 00:02:53,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:53,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:53,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:02:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:02:53,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188309794] [2019-11-16 00:02:53,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:02:53,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-16 00:02:53,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287966044] [2019-11-16 00:02:53,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-16 00:02:53,444 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-16 00:02:53,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:02:53,458 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-16 00:02:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:53,475 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2019-11-16 00:02:53,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-16 00:02:53,477 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-16 00:02:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:53,486 INFO L225 Difference]: With dead ends: 44 [2019-11-16 00:02:53,487 INFO L226 Difference]: Without dead ends: 21 [2019-11-16 00:02:53,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:02:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-16 00:02:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-16 00:02:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-16 00:02:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-11-16 00:02:53,526 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2019-11-16 00:02:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:53,527 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-11-16 00:02:53,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-16 00:02:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-11-16 00:02:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:02:53,528 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:53,528 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:53,528 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash -953872449, now seen corresponding path program 1 times [2019-11-16 00:02:53,529 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:53,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106954066] [2019-11-16 00:02:53,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:53,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:53,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:53,549 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:53,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781995193] [2019-11-16 00:02:53,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:02:53,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-16 00:02:53,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:02:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:02:53,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106954066] [2019-11-16 00:02:53,682 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-16 00:02:53,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781995193] [2019-11-16 00:02:53,683 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:02:53,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-16 00:02:53,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925269818] [2019-11-16 00:02:53,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-16 00:02:53,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:53,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-16 00:02:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:02:53,686 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 3 states. [2019-11-16 00:02:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:53,758 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-11-16 00:02:53,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-16 00:02:53,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-16 00:02:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:53,760 INFO L225 Difference]: With dead ends: 39 [2019-11-16 00:02:53,760 INFO L226 Difference]: Without dead ends: 24 [2019-11-16 00:02:53,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:02:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-16 00:02:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-16 00:02:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-16 00:02:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-16 00:02:53,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2019-11-16 00:02:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:53,766 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-16 00:02:53,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-16 00:02:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-16 00:02:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-16 00:02:53,768 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:53,768 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:53,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:53,979 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash 361112916, now seen corresponding path program 1 times [2019-11-16 00:02:53,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:53,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590669381] [2019-11-16 00:02:53,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:53,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:53,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:54,006 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:54,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018772274] [2019-11-16 00:02:54,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:02:54,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-16 00:02:54,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:02:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:02:54,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590669381] [2019-11-16 00:02:54,096 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-16 00:02:54,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018772274] [2019-11-16 00:02:54,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:02:54,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-16 00:02:54,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140651517] [2019-11-16 00:02:54,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:02:54,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:02:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:02:54,098 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 4 states. [2019-11-16 00:02:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:54,200 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-11-16 00:02:54,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:02:54,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-16 00:02:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:54,202 INFO L225 Difference]: With dead ends: 47 [2019-11-16 00:02:54,202 INFO L226 Difference]: Without dead ends: 36 [2019-11-16 00:02:54,203 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:02:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-16 00:02:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2019-11-16 00:02:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-16 00:02:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-16 00:02:54,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2019-11-16 00:02:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:54,209 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-16 00:02:54,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:02:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-16 00:02:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-16 00:02:54,210 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:54,210 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:54,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:54,411 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1034367045, now seen corresponding path program 1 times [2019-11-16 00:02:54,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:54,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355193824] [2019-11-16 00:02:54,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:54,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:54,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:54,440 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:54,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312828766] [2019-11-16 00:02:54,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:02:54,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-16 00:02:54,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:02:54,546 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-16 00:02:54,547 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:02:54,550 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:02:54,551 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:02:54,551 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-16 00:02:54,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:02:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:02:54,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355193824] [2019-11-16 00:02:54,590 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-16 00:02:54,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312828766] [2019-11-16 00:02:54,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:02:54,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:02:54,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451234926] [2019-11-16 00:02:54,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:02:54,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:02:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:02:54,592 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2019-11-16 00:02:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:54,713 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-11-16 00:02:54,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:02:54,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-16 00:02:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:54,714 INFO L225 Difference]: With dead ends: 42 [2019-11-16 00:02:54,714 INFO L226 Difference]: Without dead ends: 40 [2019-11-16 00:02:54,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:02:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-16 00:02:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2019-11-16 00:02:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-16 00:02:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-16 00:02:54,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2019-11-16 00:02:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:54,721 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-16 00:02:54,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:02:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-16 00:02:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-16 00:02:54,723 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:54,723 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:54,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:54,924 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash 740640317, now seen corresponding path program 1 times [2019-11-16 00:02:54,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:54,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708244472] [2019-11-16 00:02:54,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:54,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:54,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:54,971 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:54,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144406261] [2019-11-16 00:02:54,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:02:55,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-16 00:02:55,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:02:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:02:55,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708244472] [2019-11-16 00:02:55,055 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-16 00:02:55,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144406261] [2019-11-16 00:02:55,056 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:02:55,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-16 00:02:55,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178521929] [2019-11-16 00:02:55,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-16 00:02:55,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-16 00:02:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:02:55,057 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 3 states. [2019-11-16 00:02:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:55,133 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2019-11-16 00:02:55,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-16 00:02:55,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-16 00:02:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:55,134 INFO L225 Difference]: With dead ends: 60 [2019-11-16 00:02:55,134 INFO L226 Difference]: Without dead ends: 34 [2019-11-16 00:02:55,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:02:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-16 00:02:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-11-16 00:02:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-16 00:02:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-11-16 00:02:55,141 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2019-11-16 00:02:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:55,141 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-11-16 00:02:55,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-16 00:02:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-11-16 00:02:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-16 00:02:55,143 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:55,143 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:55,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:55,350 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1318744497, now seen corresponding path program 1 times [2019-11-16 00:02:55,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:55,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354949185] [2019-11-16 00:02:55,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:55,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:55,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:55,365 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:55,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655675001] [2019-11-16 00:02:55,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:02:55,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-16 00:02:55,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:02:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:02:55,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354949185] [2019-11-16 00:02:55,479 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-16 00:02:55,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655675001] [2019-11-16 00:02:55,480 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:02:55,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-16 00:02:55,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895047054] [2019-11-16 00:02:55,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:02:55,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:55,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:02:55,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:02:55,481 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2019-11-16 00:02:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:55,701 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2019-11-16 00:02:55,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:02:55,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-16 00:02:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:55,704 INFO L225 Difference]: With dead ends: 85 [2019-11-16 00:02:55,704 INFO L226 Difference]: Without dead ends: 49 [2019-11-16 00:02:55,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:02:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-16 00:02:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-11-16 00:02:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-16 00:02:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-16 00:02:55,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2019-11-16 00:02:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:55,712 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-16 00:02:55,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:02:55,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-16 00:02:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-16 00:02:55,715 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:55,715 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:55,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:55,918 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:55,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash 180948411, now seen corresponding path program 1 times [2019-11-16 00:02:55,919 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:55,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974941749] [2019-11-16 00:02:55,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:55,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:55,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:55,941 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:55,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047515435] [2019-11-16 00:02:55,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:02:56,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-16 00:02:56,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:02:56,031 INFO L375 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 14 treesize of output 12 [2019-11-16 00:02:56,031 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,041 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:02:56,042 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,042 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:4 [2019-11-16 00:02:56,067 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-16 00:02:56,067 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,076 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:02:56,077 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,077 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-16 00:02:56,253 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2019-11-16 00:02:56,253 INFO L341 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2019-11-16 00:02:56,254 INFO L375 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 6 case distinctions, treesize of input 43 treesize of output 140 [2019-11-16 00:02:56,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,348 INFO L567 ElimStorePlain]: treesize reduction 107, result has 37.4 percent of original size [2019-11-16 00:02:56,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:02:56,351 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:12 [2019-11-16 00:02:56,405 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-16 00:02:56,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,422 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:02:56,422 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,423 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-16 00:02:56,502 INFO L341 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2019-11-16 00:02:56,503 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2019-11-16 00:02:56,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:02:56,522 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:02:56,523 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. [2019-11-16 00:02:56,523 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:34 [2019-11-16 00:02:56,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:02:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-16 00:02:56,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974941749] [2019-11-16 00:02:56,686 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-16 00:02:56,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047515435] [2019-11-16 00:02:56,687 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:02:56,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-16 00:02:56,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630641731] [2019-11-16 00:02:56,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:02:56,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:56,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:02:56,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:02:56,689 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 14 states. [2019-11-16 00:02:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:57,244 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-11-16 00:02:57,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-16 00:02:57,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-11-16 00:02:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:57,247 INFO L225 Difference]: With dead ends: 66 [2019-11-16 00:02:57,247 INFO L226 Difference]: Without dead ends: 44 [2019-11-16 00:02:57,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:02:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-16 00:02:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2019-11-16 00:02:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-16 00:02:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-16 00:02:57,253 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2019-11-16 00:02:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:57,254 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-16 00:02:57,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:02:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-16 00:02:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-16 00:02:57,256 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:57,256 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:57,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:57,462 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:57,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1220259761, now seen corresponding path program 2 times [2019-11-16 00:02:57,462 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:57,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839481366] [2019-11-16 00:02:57,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:57,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:57,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:57,496 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:57,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161169873] [2019-11-16 00:02:57,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:57,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:02:57,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:02:57,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:02:57,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:02:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-16 00:02:57,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839481366] [2019-11-16 00:02:57,662 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-16 00:02:57,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161169873] [2019-11-16 00:02:57,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:02:57,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-16 00:02:57,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18912123] [2019-11-16 00:02:57,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-16 00:02:57,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:02:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-16 00:02:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:02:57,664 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-16 00:02:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:02:57,902 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2019-11-16 00:02:57,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-16 00:02:57,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-16 00:02:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:02:57,905 INFO L225 Difference]: With dead ends: 114 [2019-11-16 00:02:57,905 INFO L226 Difference]: Without dead ends: 62 [2019-11-16 00:02:57,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:02:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-16 00:02:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2019-11-16 00:02:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-16 00:02:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-16 00:02:57,919 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2019-11-16 00:02:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:02:57,920 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-16 00:02:57,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-16 00:02:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-16 00:02:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-16 00:02:57,928 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:02:57,928 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:02:58,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:58,140 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:02:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:02:58,141 INFO L82 PathProgramCache]: Analyzing trace with hash -279478169, now seen corresponding path program 3 times [2019-11-16 00:02:58,141 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:02:58,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257942815] [2019-11-16 00:02:58,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:58,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:02:58,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:02:58,161 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-16 00:02:58,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090943595] [2019-11-16 00:02:58,161 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/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 [2019-11-16 00:02:58,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-16 00:02:58,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-16 00:02:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:02:58,300 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-16 00:02:58,301 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-16 00:02:58,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:02:58,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:02:58 BoogieIcfgContainer [2019-11-16 00:02:58,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:02:58,563 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:02:58,563 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:02:58,563 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:02:58,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:53" (3/4) ... [2019-11-16 00:02:58,566 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-16 00:02:58,641 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_af40cd84-5137-4de3-8c1d-af8c9c237352/bin/uautomizer/witness.graphml [2019-11-16 00:02:58,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:02:58,643 INFO L168 Benchmark]: Toolchain (without parser) took 6298.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.7 MB in the beginning and 982.5 MB in the end (delta: -37.8 MB). Peak memory consumption was 98.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:02:58,643 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:02:58,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -186.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-16 00:02:58,644 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:02:58,645 INFO L168 Benchmark]: Boogie Preprocessor took 31.47 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:02:58,645 INFO L168 Benchmark]: RCFGBuilder took 379.60 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-16 00:02:58,646 INFO L168 Benchmark]: TraceAbstraction took 5401.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 989.3 MB in the end (delta: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:02:58,646 INFO L168 Benchmark]: Witness Printer took 78.67 ms. Allocated memory is still 1.2 GB. Free memory was 989.3 MB in the beginning and 982.5 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:02:58,649 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 356.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -186.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.47 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 379.60 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5401.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 989.3 MB in the end (delta: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 11.5 GB. * Witness Printer took 78.67 ms. Allocated memory is still 1.2 GB. Free memory was 989.3 MB in the beginning and 982.5 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 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); [L25] long long *c = malloc(sizeof(long long)*N); [L27] i=0 VAL [N=3] [L27] COND TRUE i