./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/prod4br.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_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/prod4br.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/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 b55beb4a61cd142d078470b74af01af0a947567d .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 14:27:44,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:27:44,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:27:44,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:27:44,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:27:44,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:27:44,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:27:44,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:27:44,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:27:44,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:27:44,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:27:44,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:27:44,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:27:44,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:27:44,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:27:44,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:27:44,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:27:44,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:27:44,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:27:44,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:27:44,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:27:44,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:27:44,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:27:44,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:27:44,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:27:44,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:27:44,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:27:44,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:27:44,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:27:44,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:27:44,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:27:44,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:27:44,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:27:44,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:27:44,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:27:44,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:27:44,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:27:44,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:27:44,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:27:44,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:27:44,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:27:44,290 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 14:27:44,302 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:27:44,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:27:44,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:27:44,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:27:44,304 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:27:44,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:27:44,305 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:27:44,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:27:44,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:27:44,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:27:44,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 14:27:44,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:27:44,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 14:27:44,306 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:27:44,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:27:44,306 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:27:44,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 14:27:44,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:27:44,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:27:44,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:27:44,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:27:44,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:27:44,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:27:44,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:27:44,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 14:27:44,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:27:44,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:27:44,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 14:27:44,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:27:44,309 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_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/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 -> b55beb4a61cd142d078470b74af01af0a947567d [2019-12-07 14:27:44,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:27:44,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:27:44,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:27:44,421 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:27:44,421 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:27:44,422 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/../../sv-benchmarks/c/nla-digbench/prod4br.c [2019-12-07 14:27:44,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/data/0f7e5dc6d/eac6a89c283e4a77a606e3d763237c47/FLAG05cc0b8db [2019-12-07 14:27:44,869 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:27:44,869 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/sv-benchmarks/c/nla-digbench/prod4br.c [2019-12-07 14:27:44,873 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/data/0f7e5dc6d/eac6a89c283e4a77a606e3d763237c47/FLAG05cc0b8db [2019-12-07 14:27:44,883 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/data/0f7e5dc6d/eac6a89c283e4a77a606e3d763237c47 [2019-12-07 14:27:44,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:27:44,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:27:44,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:27:44,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:27:44,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:27:44,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:27:44" (1/1) ... [2019-12-07 14:27:44,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8c33a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:44, skipping insertion in model container [2019-12-07 14:27:44,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:27:44" (1/1) ... [2019-12-07 14:27:44,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:27:44,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:27:45,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:27:45,020 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:27:45,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:27:45,083 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:27:45,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45 WrapperNode [2019-12-07 14:27:45,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:27:45,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:27:45,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:27:45,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:27:45,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:27:45,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:27:45,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:27:45,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:27:45,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... [2019-12-07 14:27:45,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:27:45,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:27:45,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:27:45,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:27:45,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:27:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:27:45,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:27:45,292 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:27:45,292 INFO L287 CfgBuilder]: Removed 11 assume(true) statements. [2019-12-07 14:27:45,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:27:45 BoogieIcfgContainer [2019-12-07 14:27:45,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:27:45,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:27:45,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:27:45,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:27:45,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:27:44" (1/3) ... [2019-12-07 14:27:45,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5a2ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:27:45, skipping insertion in model container [2019-12-07 14:27:45,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:45" (2/3) ... [2019-12-07 14:27:45,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5a2ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:27:45, skipping insertion in model container [2019-12-07 14:27:45,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:27:45" (3/3) ... [2019-12-07 14:27:45,297 INFO L109 eAbstractionObserver]: Analyzing ICFG prod4br.c [2019-12-07 14:27:45,303 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:27:45,308 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-12-07 14:27:45,314 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 14:27:45,328 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:27:45,329 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 14:27:45,329 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:27:45,329 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:27:45,329 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:27:45,329 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:27:45,329 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:27:45,329 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:27:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-12-07 14:27:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 14:27:45,342 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:45,342 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 14:27:45,342 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:45,346 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-12-07 14:27:45,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:45,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527689694] [2019-12-07 14:27:45,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:45,406 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:45,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400748331] [2019-12-07 14:27:45,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:45,432 WARN L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 14:27:45,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:45,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527689694] [2019-12-07 14:27:45,477 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:45,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400748331] [2019-12-07 14:27:45,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:27:45,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:27:45,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957763453] [2019-12-07 14:27:45,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:27:45,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:45,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:27:45,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:27:45,491 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2019-12-07 14:27:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:45,580 INFO L93 Difference]: Finished difference Result 60 states and 86 transitions. [2019-12-07 14:27:45,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:27:45,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 14:27:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:45,591 INFO L225 Difference]: With dead ends: 60 [2019-12-07 14:27:45,592 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 14:27:45,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:27:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 14:27:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2019-12-07 14:27:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 14:27:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-12-07 14:27:45,619 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2019-12-07 14:27:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:45,619 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-12-07 14:27:45,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:27:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-12-07 14:27:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 14:27:45,620 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:45,620 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:45,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:45,821 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:45,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:45,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1361008416, now seen corresponding path program 1 times [2019-12-07 14:27:45,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:45,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139339627] [2019-12-07 14:27:45,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:45,837 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:45,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599959844] [2019-12-07 14:27:45,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:45,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 14:27:45,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:45,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:45,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:45,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139339627] [2019-12-07 14:27:45,980 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:45,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599959844] [2019-12-07 14:27:45,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:27:45,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 14:27:45,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642924027] [2019-12-07 14:27:45,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:27:45,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:27:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:27:45,982 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2019-12-07 14:27:48,050 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2019-12-07 14:27:48,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:48,294 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-12-07 14:27:48,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:27:48,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-12-07 14:27:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:48,295 INFO L225 Difference]: With dead ends: 36 [2019-12-07 14:27:48,295 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 14:27:48,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:27:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 14:27:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2019-12-07 14:27:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 14:27:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 14:27:48,300 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 7 [2019-12-07 14:27:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:48,300 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 14:27:48,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:27:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 14:27:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 14:27:48,301 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:48,302 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:48,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:48,502 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash 759715009, now seen corresponding path program 1 times [2019-12-07 14:27:48,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:48,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718941538] [2019-12-07 14:27:48,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:48,515 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:48,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577708966] [2019-12-07 14:27:48,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:48,581 WARN L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 14:27:48,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:48,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:48,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:48,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718941538] [2019-12-07 14:27:48,696 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:48,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577708966] [2019-12-07 14:27:48,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:27:48,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 14:27:48,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946442385] [2019-12-07 14:27:48,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:27:48,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:27:48,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:27:48,699 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-12-07 14:27:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:48,935 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-12-07 14:27:48,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:27:48,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-12-07 14:27:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:48,936 INFO L225 Difference]: With dead ends: 54 [2019-12-07 14:27:48,936 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 14:27:48,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:27:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 14:27:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2019-12-07 14:27:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 14:27:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2019-12-07 14:27:48,941 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 8 [2019-12-07 14:27:48,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:48,942 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2019-12-07 14:27:48,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:27:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2019-12-07 14:27:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 14:27:48,942 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:48,942 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:49,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:49,144 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2036094115, now seen corresponding path program 1 times [2019-12-07 14:27:49,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:49,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478724692] [2019-12-07 14:27:49,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:49,159 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:49,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840354298] [2019-12-07 14:27:49,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:49,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 14:27:49,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:49,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478724692] [2019-12-07 14:27:49,207 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:49,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840354298] [2019-12-07 14:27:49,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:27:49,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:27:49,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511446460] [2019-12-07 14:27:49,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:27:49,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:27:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:27:49,208 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 5 states. [2019-12-07 14:27:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:49,256 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-12-07 14:27:49,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:27:49,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 14:27:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:49,257 INFO L225 Difference]: With dead ends: 46 [2019-12-07 14:27:49,257 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 14:27:49,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:27:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 14:27:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-12-07 14:27:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 14:27:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-12-07 14:27:49,262 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 9 [2019-12-07 14:27:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:49,262 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-12-07 14:27:49,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:27:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2019-12-07 14:27:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 14:27:49,263 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:49,263 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:49,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:49,464 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2078858104, now seen corresponding path program 1 times [2019-12-07 14:27:49,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:49,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2521721] [2019-12-07 14:27:49,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:49,468 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:49,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671336038] [2019-12-07 14:27:49,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:49,489 WARN L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 14:27:49,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:49,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:49,726 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-12-07 14:27:49,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:49,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2521721] [2019-12-07 14:27:49,737 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:49,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671336038] [2019-12-07 14:27:49,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:27:49,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 14:27:49,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920656882] [2019-12-07 14:27:49,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:27:49,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:27:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:27:49,739 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 7 states. [2019-12-07 14:27:50,001 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2019-12-07 14:27:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:50,078 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2019-12-07 14:27:50,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:27:50,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 14:27:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:50,079 INFO L225 Difference]: With dead ends: 66 [2019-12-07 14:27:50,079 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 14:27:50,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:27:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 14:27:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-12-07 14:27:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 14:27:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-12-07 14:27:50,083 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 9 [2019-12-07 14:27:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:50,084 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-12-07 14:27:50,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:27:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-12-07 14:27:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:27:50,084 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:50,084 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:50,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:50,286 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash 22770044, now seen corresponding path program 1 times [2019-12-07 14:27:50,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:50,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059842064] [2019-12-07 14:27:50,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:50,293 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:50,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726603410] [2019-12-07 14:27:50,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:50,315 WARN L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 14:27:50,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:50,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:50,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:50,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059842064] [2019-12-07 14:27:50,408 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:50,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726603410] [2019-12-07 14:27:50,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:27:50,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 14:27:50,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943741931] [2019-12-07 14:27:50,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:27:50,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:50,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:27:50,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:27:50,410 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 7 states. [2019-12-07 14:27:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:50,541 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2019-12-07 14:27:50,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:27:50,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 14:27:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:50,542 INFO L225 Difference]: With dead ends: 67 [2019-12-07 14:27:50,542 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 14:27:50,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:27:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 14:27:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-12-07 14:27:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 14:27:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2019-12-07 14:27:50,547 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 10 [2019-12-07 14:27:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:50,547 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2019-12-07 14:27:50,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:27:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2019-12-07 14:27:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:27:50,547 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:50,547 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:50,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:50,749 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash 22829626, now seen corresponding path program 1 times [2019-12-07 14:27:50,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:50,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720725262] [2019-12-07 14:27:50,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:50,762 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:50,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334882244] [2019-12-07 14:27:50,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:50,825 WARN L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 14:27:50,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:50,971 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2019-12-07 14:27:51,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:51,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720725262] [2019-12-07 14:27:51,039 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:51,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334882244] [2019-12-07 14:27:51,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:27:51,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 14:27:51,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145788609] [2019-12-07 14:27:51,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:27:51,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:27:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:27:51,040 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 6 states. [2019-12-07 14:27:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:51,190 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-12-07 14:27:51,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:27:51,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-07 14:27:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:51,191 INFO L225 Difference]: With dead ends: 73 [2019-12-07 14:27:51,191 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 14:27:51,192 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:27:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 14:27:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2019-12-07 14:27:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 14:27:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2019-12-07 14:27:51,197 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 10 [2019-12-07 14:27:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:51,197 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2019-12-07 14:27:51,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:27:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2019-12-07 14:27:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 14:27:51,198 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:51,198 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:51,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:51,400 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:51,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1802916085, now seen corresponding path program 1 times [2019-12-07 14:27:51,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:51,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743829779] [2019-12-07 14:27:51,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:51,416 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:27:51,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842101778] [2019-12-07 14:27:51,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:51,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 14:27:51,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:51,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:51,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:51,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:51,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:51,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:52,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:52,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:27:52,929 WARN L192 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2019-12-07 14:27:52,940 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 14:27:52,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743829779] [2019-12-07 14:27:52,940 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:27:52,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842101778] [2019-12-07 14:27:52,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:27:52,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:27:52,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513057647] [2019-12-07 14:27:52,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:27:52,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:52,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:27:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=39, Unknown=2, NotChecked=0, Total=56 [2019-12-07 14:27:52,942 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 8 states. [2019-12-07 14:27:59,338 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-07 14:28:02,720 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2019-12-07 14:28:05,566 WARN L192 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2019-12-07 14:28:06,450 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2019-12-07 14:28:07,666 WARN L192 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2019-12-07 14:28:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:14,485 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2019-12-07 14:28:14,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 14:28:14,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-07 14:28:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:14,487 INFO L225 Difference]: With dead ends: 61 [2019-12-07 14:28:14,487 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 14:28:14,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=56, Invalid=120, Unknown=6, NotChecked=0, Total=182 [2019-12-07 14:28:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 14:28:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2019-12-07 14:28:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 14:28:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2019-12-07 14:28:14,493 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 11 [2019-12-07 14:28:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:14,493 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2019-12-07 14:28:14,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2019-12-07 14:28:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 14:28:14,494 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:14,494 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-12-07 14:28:14,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:14,695 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:14,696 INFO L82 PathProgramCache]: Analyzing trace with hash -54520842, now seen corresponding path program 2 times [2019-12-07 14:28:14,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:14,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305826933] [2019-12-07 14:28:14,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:14,703 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:14,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893299608] [2019-12-07 14:28:14,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:14,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:28:14,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:28:14,727 WARN L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 14:28:14,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:14,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:14,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305826933] [2019-12-07 14:28:14,990 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:14,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893299608] [2019-12-07 14:28:14,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:14,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:28:14,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370117441] [2019-12-07 14:28:14,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:14,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2019-12-07 14:28:14,991 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 8 states. [2019-12-07 14:28:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:19,347 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2019-12-07 14:28:19,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:28:19,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-07 14:28:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:19,348 INFO L225 Difference]: With dead ends: 67 [2019-12-07 14:28:19,348 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 14:28:19,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2019-12-07 14:28:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 14:28:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-12-07 14:28:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 14:28:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2019-12-07 14:28:19,354 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 12 [2019-12-07 14:28:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:19,354 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2019-12-07 14:28:19,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2019-12-07 14:28:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 14:28:19,355 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:19,355 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:19,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:19,557 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1687616797, now seen corresponding path program 1 times [2019-12-07 14:28:19,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:19,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405526556] [2019-12-07 14:28:19,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:19,569 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:19,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597476979] [2019-12-07 14:28:19,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:19,633 WARN L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 14:28:19,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:19,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:20,383 WARN L192 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2019-12-07 14:28:20,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:20,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405526556] [2019-12-07 14:28:20,419 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:20,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597476979] [2019-12-07 14:28:20,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:20,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:28:20,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758505801] [2019-12-07 14:28:20,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:20,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:28:20,420 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand 8 states. [2019-12-07 14:28:20,822 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-12-07 14:28:21,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:21,091 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-12-07 14:28:21,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:28:21,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-07 14:28:21,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:21,092 INFO L225 Difference]: With dead ends: 92 [2019-12-07 14:28:21,092 INFO L226 Difference]: Without dead ends: 64 [2019-12-07 14:28:21,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:28:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-07 14:28:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2019-12-07 14:28:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 14:28:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2019-12-07 14:28:21,099 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 13 [2019-12-07 14:28:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:21,099 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2019-12-07 14:28:21,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2019-12-07 14:28:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 14:28:21,100 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:21,100 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:21,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:21,301 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1707108141, now seen corresponding path program 2 times [2019-12-07 14:28:21,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:21,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807883867] [2019-12-07 14:28:21,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:21,312 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:21,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285807134] [2019-12-07 14:28:21,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:21,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:28:21,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:28:21,344 WARN L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 14:28:21,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:21,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,581 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-12-07 14:28:21,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:21,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807883867] [2019-12-07 14:28:21,711 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:21,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285807134] [2019-12-07 14:28:21,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:21,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-12-07 14:28:21,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494172065] [2019-12-07 14:28:21,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 14:28:21,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 14:28:21,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:28:21,713 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 9 states. [2019-12-07 14:28:21,950 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_ULTIMATE.start_main_~b~0 c_ULTIMATE.start_main_~y~0)) (.cse1 (= c_ULTIMATE.start_main_~p~0 1)) (.cse2 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (exists ((v_ULTIMATE.start_main_~a~0_26 Int)) (and (not (= 0 v_ULTIMATE.start_main_~a~0_26)) (<= v_ULTIMATE.start_main_~a~0_26 (+ c_ULTIMATE.start_main_~a~0 1)) (<= 0 v_ULTIMATE.start_main_~a~0_26) (= 1 (mod v_ULTIMATE.start_main_~a~0_26 2))))) (.cse5 (<= 1 c_ULTIMATE.start_main_~y~0)) (.cse6 (= 0 (mod c_ULTIMATE.start_main_~b~0 2))) (.cse4 (= (+ (* (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~p~0) c_ULTIMATE.start_main_~q~0) (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0)))) (and .cse0 .cse1 .cse2 (or (and .cse0 .cse1 (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse3 (not .cse4) .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse6 .cse4)) .cse3 .cse5 .cse6 .cse4 (not (= c_ULTIMATE.start_main_~a~0 0)))) is different from false [2019-12-07 14:28:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:24,027 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2019-12-07 14:28:24,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 14:28:24,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-07 14:28:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:24,028 INFO L225 Difference]: With dead ends: 72 [2019-12-07 14:28:24,029 INFO L226 Difference]: Without dead ends: 70 [2019-12-07 14:28:24,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=79, Unknown=1, NotChecked=18, Total=132 [2019-12-07 14:28:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-07 14:28:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2019-12-07 14:28:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-07 14:28:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2019-12-07 14:28:24,034 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 13 [2019-12-07 14:28:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:24,034 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2019-12-07 14:28:24,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 14:28:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2019-12-07 14:28:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 14:28:24,034 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:24,034 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:24,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:24,236 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:24,236 INFO L82 PathProgramCache]: Analyzing trace with hash -257551248, now seen corresponding path program 1 times [2019-12-07 14:28:24,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:24,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005854082] [2019-12-07 14:28:24,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:24,245 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:24,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484034141] [2019-12-07 14:28:24,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:24,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 14:28:24,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:24,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:24,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:24,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005854082] [2019-12-07 14:28:24,388 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:24,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484034141] [2019-12-07 14:28:24,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:28:24,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 14:28:24,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426891569] [2019-12-07 14:28:24,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:24,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:24,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:28:24,389 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand 8 states. [2019-12-07 14:28:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:28,595 INFO L93 Difference]: Finished difference Result 94 states and 123 transitions. [2019-12-07 14:28:28,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:28:28,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-07 14:28:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:28,596 INFO L225 Difference]: With dead ends: 94 [2019-12-07 14:28:28,596 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 14:28:28,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:28:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 14:28:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2019-12-07 14:28:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 14:28:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2019-12-07 14:28:28,601 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 13 [2019-12-07 14:28:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:28,601 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2019-12-07 14:28:28,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2019-12-07 14:28:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 14:28:28,602 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:28,602 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:28,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:28,803 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1517456114, now seen corresponding path program 1 times [2019-12-07 14:28:28,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:28,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269719425] [2019-12-07 14:28:28,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:28,812 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:28,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813276702] [2019-12-07 14:28:28,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:28,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 14:28:28,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:28,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:28,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:28,961 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 14:28:28,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269719425] [2019-12-07 14:28:28,961 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:28,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813276702] [2019-12-07 14:28:28,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:28,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:28:28,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373782322] [2019-12-07 14:28:28,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:28,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:28,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:28,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:28:28,962 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 8 states. [2019-12-07 14:28:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:31,387 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2019-12-07 14:28:31,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 14:28:31,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-07 14:28:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:31,388 INFO L225 Difference]: With dead ends: 82 [2019-12-07 14:28:31,388 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 14:28:31,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-07 14:28:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 14:28:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2019-12-07 14:28:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 14:28:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2019-12-07 14:28:31,393 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 13 [2019-12-07 14:28:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:31,393 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2019-12-07 14:28:31,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2019-12-07 14:28:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:28:31,394 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:31,394 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:31,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:31,596 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash -773834895, now seen corresponding path program 1 times [2019-12-07 14:28:31,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:31,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460956830] [2019-12-07 14:28:31,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:31,602 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:31,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322080834] [2019-12-07 14:28:31,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:31,630 WARN L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 14:28:31,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:31,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:31,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:31,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460956830] [2019-12-07 14:28:31,782 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:31,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322080834] [2019-12-07 14:28:31,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:31,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:28:31,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738440830] [2019-12-07 14:28:31,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:31,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:31,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:31,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:28:31,783 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 8 states. [2019-12-07 14:28:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:32,029 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2019-12-07 14:28:32,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 14:28:32,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-07 14:28:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:32,030 INFO L225 Difference]: With dead ends: 107 [2019-12-07 14:28:32,030 INFO L226 Difference]: Without dead ends: 86 [2019-12-07 14:28:32,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:28:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-07 14:28:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2019-12-07 14:28:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-07 14:28:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2019-12-07 14:28:32,034 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 14 [2019-12-07 14:28:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:32,035 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2019-12-07 14:28:32,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2019-12-07 14:28:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:28:32,035 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:32,035 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:32,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:32,236 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash -773775313, now seen corresponding path program 1 times [2019-12-07 14:28:32,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:32,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808317887] [2019-12-07 14:28:32,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:32,243 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:32,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542722360] [2019-12-07 14:28:32,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:32,266 WARN L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 14:28:32,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:32,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:32,597 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2019-12-07 14:28:32,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:32,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808317887] [2019-12-07 14:28:32,664 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:32,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542722360] [2019-12-07 14:28:32,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:32,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-12-07 14:28:32,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730465240] [2019-12-07 14:28:32,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 14:28:32,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:32,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 14:28:32,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:28:32,665 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand 9 states. [2019-12-07 14:28:32,917 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-07 14:28:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:33,066 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2019-12-07 14:28:33,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:28:33,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-07 14:28:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:33,067 INFO L225 Difference]: With dead ends: 110 [2019-12-07 14:28:33,067 INFO L226 Difference]: Without dead ends: 89 [2019-12-07 14:28:33,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:28:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-07 14:28:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-12-07 14:28:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-07 14:28:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2019-12-07 14:28:33,072 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 14 [2019-12-07 14:28:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:33,072 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 100 transitions. [2019-12-07 14:28:33,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 14:28:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 100 transitions. [2019-12-07 14:28:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:28:33,072 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:33,073 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:33,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:33,274 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash 607148849, now seen corresponding path program 2 times [2019-12-07 14:28:33,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:33,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735214385] [2019-12-07 14:28:33,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:33,286 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:33,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999757947] [2019-12-07 14:28:33,287 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:33,314 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:28:33,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:28:33,315 WARN L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 14:28:33,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:33,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,649 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2019-12-07 14:28:33,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:33,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735214385] [2019-12-07 14:28:33,661 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:33,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999757947] [2019-12-07 14:28:33,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:33,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:28:33,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285973503] [2019-12-07 14:28:33,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:33,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:33,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:33,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:28:33,662 INFO L87 Difference]: Start difference. First operand 75 states and 100 transitions. Second operand 8 states. [2019-12-07 14:28:36,419 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 32 [2019-12-07 14:28:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:38,599 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2019-12-07 14:28:38,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 14:28:38,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-07 14:28:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:38,601 INFO L225 Difference]: With dead ends: 117 [2019-12-07 14:28:38,601 INFO L226 Difference]: Without dead ends: 96 [2019-12-07 14:28:38,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:28:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-07 14:28:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2019-12-07 14:28:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-07 14:28:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2019-12-07 14:28:38,605 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 14 [2019-12-07 14:28:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:38,605 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2019-12-07 14:28:38,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2019-12-07 14:28:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:28:38,606 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:38,606 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:38,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:38,807 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash -202197777, now seen corresponding path program 2 times [2019-12-07 14:28:38,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:38,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971973289] [2019-12-07 14:28:38,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:38,814 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:38,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066199216] [2019-12-07 14:28:38,815 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:38,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:28:38,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:28:38,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 14:28:38,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:38,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:38,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:39,038 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2019-12-07 14:28:39,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:39,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971973289] [2019-12-07 14:28:39,049 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:39,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066199216] [2019-12-07 14:28:39,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:39,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 14:28:39,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092315078] [2019-12-07 14:28:39,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:39,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:39,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:28:39,050 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 8 states. [2019-12-07 14:28:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:42,347 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2019-12-07 14:28:42,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:28:42,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-07 14:28:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:42,348 INFO L225 Difference]: With dead ends: 108 [2019-12-07 14:28:42,348 INFO L226 Difference]: Without dead ends: 106 [2019-12-07 14:28:42,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:28:42,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-07 14:28:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-12-07 14:28:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 14:28:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2019-12-07 14:28:42,353 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 14 [2019-12-07 14:28:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:42,353 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2019-12-07 14:28:42,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:28:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2019-12-07 14:28:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 14:28:42,354 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:42,354 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:42,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:42,555 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:42,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1601510451, now seen corresponding path program 1 times [2019-12-07 14:28:42,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:42,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333409284] [2019-12-07 14:28:42,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:42,561 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:42,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236074796] [2019-12-07 14:28:42,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:42,580 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 14:28:42,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:28:42,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333409284] [2019-12-07 14:28:42,601 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:42,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236074796] [2019-12-07 14:28:42,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:28:42,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:28:42,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505538444] [2019-12-07 14:28:42,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:28:42,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:42,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:28:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:28:42,603 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 5 states. [2019-12-07 14:28:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:42,650 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2019-12-07 14:28:42,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:28:42,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 14:28:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:42,651 INFO L225 Difference]: With dead ends: 92 [2019-12-07 14:28:42,651 INFO L226 Difference]: Without dead ends: 86 [2019-12-07 14:28:42,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:28:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-07 14:28:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-12-07 14:28:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 14:28:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2019-12-07 14:28:42,658 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 15 [2019-12-07 14:28:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:42,659 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2019-12-07 14:28:42,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:28:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2019-12-07 14:28:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 14:28:42,659 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:42,659 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:42,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:42,861 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2013398475, now seen corresponding path program 1 times [2019-12-07 14:28:42,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:42,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455182248] [2019-12-07 14:28:42,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:42,870 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:42,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725722826] [2019-12-07 14:28:42,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:42,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 14:28:42,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:42,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:42,975 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 14:28:42,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455182248] [2019-12-07 14:28:42,975 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:42,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725722826] [2019-12-07 14:28:42,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:42,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 14:28:42,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832089322] [2019-12-07 14:28:42,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:28:42,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:28:42,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:28:42,977 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 6 states. [2019-12-07 14:28:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:43,112 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-12-07 14:28:43,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:28:43,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-12-07 14:28:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:43,112 INFO L225 Difference]: With dead ends: 97 [2019-12-07 14:28:43,112 INFO L226 Difference]: Without dead ends: 89 [2019-12-07 14:28:43,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:28:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-07 14:28:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2019-12-07 14:28:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 14:28:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2019-12-07 14:28:43,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 15 [2019-12-07 14:28:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:43,120 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2019-12-07 14:28:43,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:28:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2019-12-07 14:28:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 14:28:43,120 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:43,120 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1] [2019-12-07 14:28:43,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:43,321 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1087688533, now seen corresponding path program 3 times [2019-12-07 14:28:43,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:43,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404238017] [2019-12-07 14:28:43,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:43,330 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:43,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068179645] [2019-12-07 14:28:43,331 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:43,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 14:28:43,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:28:43,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 14:28:43,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:43,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:43,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:46,223 WARN L192 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2019-12-07 14:28:46,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 14:28:46,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404238017] [2019-12-07 14:28:46,238 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:46,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068179645] [2019-12-07 14:28:46,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:46,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 14:28:46,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199573538] [2019-12-07 14:28:46,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:28:46,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:28:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2019-12-07 14:28:46,239 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 7 states. [2019-12-07 14:28:46,601 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-12-07 14:28:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:48,640 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-12-07 14:28:48,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:28:48,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-12-07 14:28:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:48,641 INFO L225 Difference]: With dead ends: 66 [2019-12-07 14:28:48,641 INFO L226 Difference]: Without dead ends: 64 [2019-12-07 14:28:48,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=28, Invalid=43, Unknown=1, NotChecked=0, Total=72 [2019-12-07 14:28:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-07 14:28:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-12-07 14:28:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 14:28:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2019-12-07 14:28:48,646 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 16 [2019-12-07 14:28:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:48,646 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2019-12-07 14:28:48,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:28:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2019-12-07 14:28:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 14:28:48,646 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:48,647 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:48,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:48,847 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:48,848 INFO L82 PathProgramCache]: Analyzing trace with hash -445971235, now seen corresponding path program 1 times [2019-12-07 14:28:48,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:48,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597040289] [2019-12-07 14:28:48,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:48,854 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:48,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767910527] [2019-12-07 14:28:48,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:48,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 14:28:48,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:48,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:48,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:48,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:49,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:49,041 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 14:28:49,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597040289] [2019-12-07 14:28:49,041 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:49,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767910527] [2019-12-07 14:28:49,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:28:49,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-12-07 14:28:49,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526164895] [2019-12-07 14:28:49,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 14:28:49,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 14:28:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:28:49,042 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 10 states. [2019-12-07 14:28:51,987 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2019-12-07 14:28:57,972 WARN L192 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-12-07 14:28:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:28:58,326 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2019-12-07 14:28:58,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 14:28:58,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-12-07 14:28:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:28:58,327 INFO L225 Difference]: With dead ends: 77 [2019-12-07 14:28:58,327 INFO L226 Difference]: Without dead ends: 73 [2019-12-07 14:28:58,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=125, Invalid=294, Unknown=1, NotChecked=0, Total=420 [2019-12-07 14:28:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-07 14:28:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-12-07 14:28:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-07 14:28:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2019-12-07 14:28:58,334 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 17 [2019-12-07 14:28:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:28:58,334 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2019-12-07 14:28:58,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 14:28:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2019-12-07 14:28:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 14:28:58,334 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:28:58,334 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:28:58,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:58,535 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:28:58,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:28:58,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1795518430, now seen corresponding path program 1 times [2019-12-07 14:28:58,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:28:58,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865267076] [2019-12-07 14:28:58,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:28:58,540 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:28:58,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975926465] [2019-12-07 14:28:58,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:28:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:28:58,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 14:28:58,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:28:58,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:58,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:28:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 14:28:58,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865267076] [2019-12-07 14:28:58,769 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:28:58,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975926465] [2019-12-07 14:28:58,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:28:58,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 14:28:58,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063052240] [2019-12-07 14:28:58,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:28:58,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:28:58,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:28:58,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:28:58,771 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 8 states. [2019-12-07 14:28:58,956 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2019-12-07 14:29:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:29:04,135 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2019-12-07 14:29:04,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 14:29:04,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-12-07 14:29:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:29:04,136 INFO L225 Difference]: With dead ends: 94 [2019-12-07 14:29:04,137 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 14:29:04,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:29:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 14:29:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2019-12-07 14:29:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 14:29:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2019-12-07 14:29:04,143 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 20 [2019-12-07 14:29:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:29:04,143 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2019-12-07 14:29:04,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:29:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2019-12-07 14:29:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 14:29:04,143 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:29:04,143 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:29:04,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:29:04,344 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:29:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:29:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash -361852600, now seen corresponding path program 2 times [2019-12-07 14:29:04,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:29:04,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041650389] [2019-12-07 14:29:04,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:29:04,351 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:29:04,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572684727] [2019-12-07 14:29:04,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:29:04,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 14:29:04,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:29:04,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 14:29:04,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:29:04,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:29:04,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:29:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 14:29:04,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041650389] [2019-12-07 14:29:04,428 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:29:04,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572684727] [2019-12-07 14:29:04,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:29:04,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 14:29:04,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318620737] [2019-12-07 14:29:04,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:29:04,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:29:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:29:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:29:04,429 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 7 states. [2019-12-07 14:29:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:29:06,610 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2019-12-07 14:29:06,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 14:29:06,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-12-07 14:29:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:29:06,611 INFO L225 Difference]: With dead ends: 77 [2019-12-07 14:29:06,611 INFO L226 Difference]: Without dead ends: 73 [2019-12-07 14:29:06,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-12-07 14:29:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-07 14:29:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2019-12-07 14:29:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-07 14:29:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-12-07 14:29:06,616 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 21 [2019-12-07 14:29:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:29:06,616 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-12-07 14:29:06,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:29:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-12-07 14:29:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 14:29:06,617 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:29:06,617 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:29:06,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:29:06,818 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:29:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:29:06,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1125066797, now seen corresponding path program 1 times [2019-12-07 14:29:06,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:29:06,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447578741] [2019-12-07 14:29:06,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:29:06,824 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:29:06,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811236848] [2019-12-07 14:29:06,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:29:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:29:06,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 14:29:06,851 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:29:06,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:29:06,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:29:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:29:06,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447578741] [2019-12-07 14:29:06,941 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:29:06,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811236848] [2019-12-07 14:29:06,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:29:06,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 14:29:06,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763463009] [2019-12-07 14:29:06,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:29:06,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:29:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:29:06,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:29:06,943 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 6 states. [2019-12-07 14:29:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:29:07,042 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2019-12-07 14:29:07,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:29:07,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-12-07 14:29:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:29:07,043 INFO L225 Difference]: With dead ends: 103 [2019-12-07 14:29:07,043 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 14:29:07,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:29:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 14:29:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2019-12-07 14:29:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 14:29:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2019-12-07 14:29:07,050 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 23 [2019-12-07 14:29:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:29:07,050 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2019-12-07 14:29:07,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:29:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2019-12-07 14:29:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 14:29:07,050 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:29:07,050 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:29:07,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:29:07,251 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:29:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:29:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash -867484563, now seen corresponding path program 2 times [2019-12-07 14:29:07,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:29:07,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406938560] [2019-12-07 14:29:07,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:29:07,254 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 14:29:07,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792797355] [2019-12-07 14:29:07,254 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:29:07,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 14:29:07,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:29:07,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 14:29:07,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:29:07,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:29:09,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:29:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 14:29:09,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406938560] [2019-12-07 14:29:09,342 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:29:09,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792797355] [2019-12-07 14:29:09,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:29:09,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 14:29:09,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189883849] [2019-12-07 14:29:09,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:29:09,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:29:09,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:29:09,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2019-12-07 14:29:09,342 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 7 states. [2019-12-07 14:29:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:29:11,779 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-12-07 14:29:11,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:29:11,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-12-07 14:29:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:29:11,780 INFO L225 Difference]: With dead ends: 56 [2019-12-07 14:29:11,780 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 14:29:11,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=42, Invalid=67, Unknown=1, NotChecked=0, Total=110 [2019-12-07 14:29:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 14:29:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 14:29:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 14:29:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:29:11,781 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2019-12-07 14:29:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:29:11,781 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:29:11,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:29:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:29:11,781 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 14:29:11,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:29:11,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 14:29:12,179 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 169 [2019-12-07 14:29:12,334 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 19 [2019-12-07 14:29:23,493 WARN L192 SmtUtils]: Spent 11.16 s on a formula simplification. DAG size of input: 163 DAG size of output: 24 [2019-12-07 14:29:23,509 INFO L246 CegarLoopResult]: For program point L27-2(lines 27 48) no Hoare annotation was computed. [2019-12-07 14:29:23,509 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-12-07 14:29:23,509 INFO L249 CegarLoopResult]: At program point L52(lines 14 53) the Hoare annotation is: true [2019-12-07 14:29:23,509 INFO L246 CegarLoopResult]: For program point L40(lines 40 47) no Hoare annotation was computed. [2019-12-07 14:29:23,509 INFO L246 CegarLoopResult]: For program point L7(lines 7 10) no Hoare annotation was computed. [2019-12-07 14:29:23,509 INFO L242 CegarLoopResult]: At program point L40-2(lines 27 48) the Hoare annotation is: (let ((.cse0 (= (+ (* (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~p~0) ULTIMATE.start_main_~q~0) (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (.cse1 (<= 1 ULTIMATE.start_main_~y~0))) (or (and (<= 0 ULTIMATE.start_main_~b~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 .cse1) (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~p~0 1) .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse1))) [2019-12-07 14:29:23,509 INFO L242 CegarLoopResult]: At program point L7-2(lines 30 31) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~b~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~y~0) (= (+ (* (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~p~0) ULTIMATE.start_main_~q~0) (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) [2019-12-07 14:29:23,509 INFO L246 CegarLoopResult]: For program point L7-3(lines 7 10) no Hoare annotation was computed. [2019-12-07 14:29:23,509 INFO L242 CegarLoopResult]: At program point L7-5(lines 6 12) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~b~0 0) (<= 1 ULTIMATE.start_main_~y~0)) (and (= ULTIMATE.start_main_~a~0 0) (<= 1 ULTIMATE.start_main_~b~0))) [2019-12-07 14:29:23,509 INFO L246 CegarLoopResult]: For program point L7-6(lines 7 10) no Hoare annotation was computed. [2019-12-07 14:29:23,509 INFO L249 CegarLoopResult]: At program point L7-8(lines 6 12) the Hoare annotation is: true [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point L8(lines 8 9) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point L8-1(lines 8 9) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point L8-2(lines 8 9) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point L37(lines 37 47) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point L33(lines 33 47) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 14:29:23,510 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-12-07 14:29:23,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:29:23 BoogieIcfgContainer [2019-12-07 14:29:23,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:29:23,522 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:29:23,522 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:29:23,523 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:29:23,523 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:27:45" (3/4) ... [2019-12-07 14:29:23,526 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 14:29:23,533 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 14:29:23,533 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 14:29:23,562 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d7ab3c2-b2df-4a30-baa7-f4731de99c7a/bin/uautomizer/witness.graphml [2019-12-07 14:29:23,562 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:29:23,563 INFO L168 Benchmark]: Toolchain (without parser) took 98676.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 945.2 MB in the beginning and 851.9 MB in the end (delta: 93.4 MB). Peak memory consumption was 208.2 MB. Max. memory is 11.5 GB. [2019-12-07 14:29:23,563 INFO L168 Benchmark]: CDTParser took 0.16 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 14:29:23,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:29:23,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.60 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 14:29:23,564 INFO L168 Benchmark]: Boogie Preprocessor took 15.26 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 14:29:23,564 INFO L168 Benchmark]: RCFGBuilder took 168.46 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 14:29:23,564 INFO L168 Benchmark]: TraceAbstraction took 98228.44 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Free memory was 1.1 GB in the beginning and 854.0 MB in the end (delta: 215.4 MB). Peak memory consumption was 233.7 MB. Max. memory is 11.5 GB. [2019-12-07 14:29:23,564 INFO L168 Benchmark]: Witness Printer took 39.80 ms. Allocated memory is still 1.1 GB. Free memory was 854.0 MB in the beginning and 851.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 14:29:23,565 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 196.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.60 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. * Boogie Preprocessor took 15.26 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 168.46 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 98228.44 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Free memory was 1.1 GB in the beginning and 854.0 MB in the end (delta: 215.4 MB). Peak memory consumption was 233.7 MB. Max. memory is 11.5 GB. * Witness Printer took 39.80 ms. Allocated memory is still 1.1 GB. Free memory was 854.0 MB in the beginning and 851.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((0 <= b && 1 == cond) && 1 <= y) && a * b * p + q == x * y - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((0 <= b && 1 == cond) && a * b * p + q == x * y) && 1 <= y) || ((((b == y && p == 1) && a * b * p + q == x * y) && a == x) && 1 <= y) - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: (b == 0 && 1 <= y) || (a == 0 && 1 <= b) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 3 error locations. Result: SAFE, OverallTime: 86.6s, OverallIterations: 25, TraceHistogramMax: 4, AutomataDifference: 69.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 11.5s, HoareTripleCheckerStatistics: 248 SDtfs, 620 SDslu, 696 SDs, 0 SdLazy, 2031 SolverSat, 285 SolverUnsat, 88 SolverUnknown, 0 SolverNotchecked, 50.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 398 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 216 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 28.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 288 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 33 NumberOfFragments, 84 HoareAnnotationTreeSize, 5 FomulaSimplifications, 587456 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 2909 FormulaSimplificationTreeSizeReductionInter, 11.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 338 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 313 ConstructedInterpolants, 41 QuantifiedInterpolants, 56970 SizeOfPredicates, 222 NumberOfNonLiveVariables, 1287 ConjunctsInSsa, 540 ConjunctsInUnsatCore, 25 InterpolantComputations, 8 PerfectInterpolantSequences, 105/195 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! Received shutdown request...