./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum.i --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_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 279fae57395782089eff32ec1396d1726d808c7f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 15:18:06,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:18:06,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:18:06,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:18:06,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:18:06,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:18:06,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:18:06,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:18:06,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:18:06,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:18:06,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:18:06,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:18:06,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:18:06,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:18:06,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:18:06,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:18:06,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:18:06,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:18:06,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:18:06,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:18:06,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:18:06,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:18:06,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:18:06,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:18:06,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:18:06,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:18:06,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:18:06,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:18:06,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:18:06,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:18:06,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:18:06,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:18:06,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:18:06,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:18:06,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:18:06,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:18:06,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:18:06,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:18:06,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:18:06,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:18:06,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:18:06,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 15:18:06,395 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:18:06,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:18:06,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 15:18:06,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 15:18:06,397 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 15:18:06,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:18:06,397 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:18:06,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:18:06,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:18:06,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:18:06,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:18:06,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:18:06,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:18:06,398 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:18:06,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:18:06,398 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:18:06,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:18:06,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:18:06,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 15:18:06,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:18:06,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:18:06,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:18:06,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:18:06,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:18:06,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:18:06,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 15:18:06,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:18:06,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:18:06,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:18:06,400 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_a1068e09-da2e-4673-8392-3649c6cd5d64/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 -> 279fae57395782089eff32ec1396d1726d808c7f [2019-12-07 15:18:06,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:18:06,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:18:06,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:18:06,507 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:18:06,507 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:18:06,508 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum.i [2019-12-07 15:18:06,544 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/data/5b107eb64/6a253350bbb6447ebd70da8eab904d87/FLAGd47b15ef6 [2019-12-07 15:18:07,008 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:18:07,008 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/sv-benchmarks/c/reducercommutativity/rangesum.i [2019-12-07 15:18:07,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/data/5b107eb64/6a253350bbb6447ebd70da8eab904d87/FLAGd47b15ef6 [2019-12-07 15:18:07,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/data/5b107eb64/6a253350bbb6447ebd70da8eab904d87 [2019-12-07 15:18:07,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:18:07,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:18:07,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:18:07,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:18:07,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:18:07,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d486204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07, skipping insertion in model container [2019-12-07 15:18:07,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:18:07,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:18:07,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:18:07,193 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:18:07,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:18:07,218 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:18:07,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07 WrapperNode [2019-12-07 15:18:07,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:18:07,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:18:07,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:18:07,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:18:07,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:18:07,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:18:07,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:18:07,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:18:07,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... [2019-12-07 15:18:07,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:18:07,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:18:07,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:18:07,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:18:07,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:07,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 15:18:07,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:18:07,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:18:07,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 15:18:07,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 15:18:07,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 15:18:07,518 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:18:07,518 INFO L287 CfgBuilder]: Removed 17 assume(true) statements. [2019-12-07 15:18:07,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:18:07 BoogieIcfgContainer [2019-12-07 15:18:07,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:18:07,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:18:07,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:18:07,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:18:07,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:18:07" (1/3) ... [2019-12-07 15:18:07,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34175b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:18:07, skipping insertion in model container [2019-12-07 15:18:07,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:18:07" (2/3) ... [2019-12-07 15:18:07,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34175b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:18:07, skipping insertion in model container [2019-12-07 15:18:07,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:18:07" (3/3) ... [2019-12-07 15:18:07,523 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2019-12-07 15:18:07,529 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:18:07,535 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 15:18:07,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 15:18:07,557 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:18:07,558 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:18:07,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:18:07,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:18:07,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:18:07,558 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:18:07,558 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:18:07,558 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:18:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-12-07 15:18:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 15:18:07,572 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:07,572 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:07,572 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2019-12-07 15:18:07,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:07,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225355292] [2019-12-07 15:18:07,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:07,675 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 15:18:07,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225355292] [2019-12-07 15:18:07,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:18:07,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:18:07,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237836767] [2019-12-07 15:18:07,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 15:18:07,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 15:18:07,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 15:18:07,689 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-12-07 15:18:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:07,701 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2019-12-07 15:18:07,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 15:18:07,702 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-12-07 15:18:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:07,708 INFO L225 Difference]: With dead ends: 59 [2019-12-07 15:18:07,708 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 15:18:07,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 15:18:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 15:18:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 15:18:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 15:18:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-12-07 15:18:07,732 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2019-12-07 15:18:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:07,732 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-12-07 15:18:07,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 15:18:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-12-07 15:18:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 15:18:07,733 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:07,733 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:07,733 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:07,733 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2019-12-07 15:18:07,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:07,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290019711] [2019-12-07 15:18:07,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:07,746 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:07,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604627446] [2019-12-07 15:18:07,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:07,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:18:07,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:07,822 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 15:18:07,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290019711] [2019-12-07 15:18:07,822 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:07,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604627446] [2019-12-07 15:18:07,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:18:07,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 15:18:07,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74734896] [2019-12-07 15:18:07,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:18:07,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:18:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:18:07,824 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-12-07 15:18:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:07,860 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2019-12-07 15:18:07,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:18:07,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-12-07 15:18:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:07,861 INFO L225 Difference]: With dead ends: 65 [2019-12-07 15:18:07,861 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 15:18:07,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:18:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 15:18:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-12-07 15:18:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 15:18:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2019-12-07 15:18:07,867 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2019-12-07 15:18:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:07,867 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2019-12-07 15:18:07,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:18:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2019-12-07 15:18:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 15:18:07,868 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:07,868 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:08,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:08,069 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:08,070 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2019-12-07 15:18:08,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:08,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353002428] [2019-12-07 15:18:08,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:08,221 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 15:18:08,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353002428] [2019-12-07 15:18:08,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:18:08,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-12-07 15:18:08,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251304589] [2019-12-07 15:18:08,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 15:18:08,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 15:18:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:18:08,222 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 8 states. [2019-12-07 15:18:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:08,269 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2019-12-07 15:18:08,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 15:18:08,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-07 15:18:08,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:08,270 INFO L225 Difference]: With dead ends: 96 [2019-12-07 15:18:08,270 INFO L226 Difference]: Without dead ends: 91 [2019-12-07 15:18:08,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:18:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-07 15:18:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2019-12-07 15:18:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 15:18:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-12-07 15:18:08,278 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 18 [2019-12-07 15:18:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:08,278 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-12-07 15:18:08,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 15:18:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-12-07 15:18:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 15:18:08,279 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:08,279 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:08,279 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:08,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash -995174774, now seen corresponding path program 1 times [2019-12-07 15:18:08,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:08,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491153671] [2019-12-07 15:18:08,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:08,293 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:08,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818988304] [2019-12-07 15:18:08,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:08,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:18:08,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 15:18:08,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491153671] [2019-12-07 15:18:08,342 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:08,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818988304] [2019-12-07 15:18:08,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:18:08,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 15:18:08,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661497275] [2019-12-07 15:18:08,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:18:08,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:08,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:18:08,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:18:08,344 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 3 states. [2019-12-07 15:18:08,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:08,373 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2019-12-07 15:18:08,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:18:08,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-12-07 15:18:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:08,375 INFO L225 Difference]: With dead ends: 115 [2019-12-07 15:18:08,375 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 15:18:08,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:18:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 15:18:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-12-07 15:18:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 15:18:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2019-12-07 15:18:08,382 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 21 [2019-12-07 15:18:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:08,382 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2019-12-07 15:18:08,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:18:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2019-12-07 15:18:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 15:18:08,382 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:08,383 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:08,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:08,584 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2100366548, now seen corresponding path program 1 times [2019-12-07 15:18:08,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:08,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631643812] [2019-12-07 15:18:08,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:08,609 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:08,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086107208] [2019-12-07 15:18:08,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:08,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:18:08,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 15:18:08,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631643812] [2019-12-07 15:18:08,699 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:08,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086107208] [2019-12-07 15:18:08,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:18:08,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-12-07 15:18:08,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119225280] [2019-12-07 15:18:08,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:18:08,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:08,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:18:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:18:08,701 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 4 states. [2019-12-07 15:18:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:08,742 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2019-12-07 15:18:08,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:18:08,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-12-07 15:18:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:08,744 INFO L225 Difference]: With dead ends: 117 [2019-12-07 15:18:08,744 INFO L226 Difference]: Without dead ends: 63 [2019-12-07 15:18:08,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:18:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-07 15:18:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-12-07 15:18:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 15:18:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-12-07 15:18:08,749 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 23 [2019-12-07 15:18:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:08,749 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-12-07 15:18:08,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:18:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-12-07 15:18:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 15:18:08,750 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:08,750 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:08,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:08,951 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:08,952 INFO L82 PathProgramCache]: Analyzing trace with hash 962228046, now seen corresponding path program 2 times [2019-12-07 15:18:08,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:08,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286846508] [2019-12-07 15:18:08,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:08,969 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:08,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604780326] [2019-12-07 15:18:08,970 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:09,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 15:18:09,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:18:09,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:18:09,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 15:18:09,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286846508] [2019-12-07 15:18:09,026 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:09,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604780326] [2019-12-07 15:18:09,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:18:09,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:18:09,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543901946] [2019-12-07 15:18:09,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:18:09,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:09,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:18:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:18:09,027 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 4 states. [2019-12-07 15:18:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:09,071 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2019-12-07 15:18:09,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:18:09,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-12-07 15:18:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:09,072 INFO L225 Difference]: With dead ends: 127 [2019-12-07 15:18:09,073 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 15:18:09,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:18:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 15:18:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2019-12-07 15:18:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-07 15:18:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2019-12-07 15:18:09,080 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 25 [2019-12-07 15:18:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:09,081 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2019-12-07 15:18:09,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:18:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2019-12-07 15:18:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 15:18:09,082 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:09,082 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:09,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:09,283 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1979262774, now seen corresponding path program 1 times [2019-12-07 15:18:09,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:09,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608432676] [2019-12-07 15:18:09,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:09,328 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:09,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286032838] [2019-12-07 15:18:09,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:09,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:18:09,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 15:18:09,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608432676] [2019-12-07 15:18:09,397 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:09,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286032838] [2019-12-07 15:18:09,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:18:09,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 15:18:09,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454253769] [2019-12-07 15:18:09,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:18:09,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:18:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:18:09,398 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 5 states. [2019-12-07 15:18:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:09,458 INFO L93 Difference]: Finished difference Result 150 states and 206 transitions. [2019-12-07 15:18:09,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:18:09,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-12-07 15:18:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:09,459 INFO L225 Difference]: With dead ends: 150 [2019-12-07 15:18:09,459 INFO L226 Difference]: Without dead ends: 92 [2019-12-07 15:18:09,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:18:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-07 15:18:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-12-07 15:18:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-07 15:18:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2019-12-07 15:18:09,466 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 34 [2019-12-07 15:18:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:09,466 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2019-12-07 15:18:09,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:18:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2019-12-07 15:18:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 15:18:09,467 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:09,467 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:09,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:09,668 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:09,669 INFO L82 PathProgramCache]: Analyzing trace with hash -387145522, now seen corresponding path program 2 times [2019-12-07 15:18:09,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:09,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457960419] [2019-12-07 15:18:09,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:09,701 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:09,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456174478] [2019-12-07 15:18:09,702 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:09,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 15:18:09,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:18:09,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:18:09,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 15:18:09,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457960419] [2019-12-07 15:18:09,813 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:09,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456174478] [2019-12-07 15:18:09,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:18:09,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:18:09,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932325407] [2019-12-07 15:18:09,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:18:09,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:18:09,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:18:09,816 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 4 states. [2019-12-07 15:18:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:09,907 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-12-07 15:18:09,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:18:09,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-12-07 15:18:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:09,910 INFO L225 Difference]: With dead ends: 122 [2019-12-07 15:18:09,910 INFO L226 Difference]: Without dead ends: 91 [2019-12-07 15:18:09,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:18:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-07 15:18:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-12-07 15:18:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 15:18:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2019-12-07 15:18:09,922 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 43 [2019-12-07 15:18:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:09,923 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2019-12-07 15:18:09,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:18:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2019-12-07 15:18:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 15:18:09,925 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:09,926 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:10,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:10,127 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 1 times [2019-12-07 15:18:10,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:10,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746277981] [2019-12-07 15:18:10,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:10,161 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:10,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071036708] [2019-12-07 15:18:10,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:10,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 15:18:10,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 15:18:10,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746277981] [2019-12-07 15:18:10,259 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:10,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071036708] [2019-12-07 15:18:10,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:18:10,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-12-07 15:18:10,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920593314] [2019-12-07 15:18:10,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 15:18:10,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:10,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 15:18:10,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:18:10,261 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 9 states. [2019-12-07 15:18:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:10,364 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2019-12-07 15:18:10,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 15:18:10,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-12-07 15:18:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:10,365 INFO L225 Difference]: With dead ends: 197 [2019-12-07 15:18:10,365 INFO L226 Difference]: Without dead ends: 92 [2019-12-07 15:18:10,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-07 15:18:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-07 15:18:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-12-07 15:18:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-07 15:18:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2019-12-07 15:18:10,370 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 45 [2019-12-07 15:18:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:10,370 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2019-12-07 15:18:10,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 15:18:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2019-12-07 15:18:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-07 15:18:10,372 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:10,372 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:10,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:10,573 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash -3446958, now seen corresponding path program 2 times [2019-12-07 15:18:10,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:10,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70661590] [2019-12-07 15:18:10,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:10,600 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:10,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283382677] [2019-12-07 15:18:10,601 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:10,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:18:10,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:18:10,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 15:18:10,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-07 15:18:10,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70661590] [2019-12-07 15:18:10,677 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:10,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283382677] [2019-12-07 15:18:10,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:18:10,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-12-07 15:18:10,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293595235] [2019-12-07 15:18:10,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 15:18:10,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 15:18:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:18:10,678 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 9 states. [2019-12-07 15:18:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:10,772 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2019-12-07 15:18:10,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:18:10,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-12-07 15:18:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:10,773 INFO L225 Difference]: With dead ends: 171 [2019-12-07 15:18:10,774 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 15:18:10,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-07 15:18:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 15:18:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2019-12-07 15:18:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-07 15:18:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2019-12-07 15:18:10,781 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 47 [2019-12-07 15:18:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:10,781 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2019-12-07 15:18:10,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 15:18:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2019-12-07 15:18:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-07 15:18:10,782 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:10,783 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:10,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:10,983 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash -384159915, now seen corresponding path program 1 times [2019-12-07 15:18:10,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:10,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248515017] [2019-12-07 15:18:10,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:11,011 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:11,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630292223] [2019-12-07 15:18:11,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:18:11,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 15:18:11,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 15:18:11,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248515017] [2019-12-07 15:18:11,092 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:11,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630292223] [2019-12-07 15:18:11,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:18:11,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-12-07 15:18:11,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765472815] [2019-12-07 15:18:11,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 15:18:11,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:11,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 15:18:11,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:18:11,093 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 8 states. [2019-12-07 15:18:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:11,147 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2019-12-07 15:18:11,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 15:18:11,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-12-07 15:18:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:11,148 INFO L225 Difference]: With dead ends: 138 [2019-12-07 15:18:11,148 INFO L226 Difference]: Without dead ends: 105 [2019-12-07 15:18:11,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:18:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-07 15:18:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-12-07 15:18:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-07 15:18:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2019-12-07 15:18:11,152 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 53 [2019-12-07 15:18:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:11,153 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2019-12-07 15:18:11,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 15:18:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2019-12-07 15:18:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-07 15:18:11,153 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:11,153 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:11,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:11,354 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1685231241, now seen corresponding path program 2 times [2019-12-07 15:18:11,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:11,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561981602] [2019-12-07 15:18:11,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:11,381 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:11,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176725421] [2019-12-07 15:18:11,382 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:11,429 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:18:11,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:18:11,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 15:18:11,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:18:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 15:18:11,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561981602] [2019-12-07 15:18:11,485 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:18:11,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176725421] [2019-12-07 15:18:11,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:18:11,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-12-07 15:18:11,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356701582] [2019-12-07 15:18:11,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 15:18:11,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:18:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 15:18:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 15:18:11,486 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 10 states. [2019-12-07 15:18:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:18:11,627 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2019-12-07 15:18:11,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 15:18:11,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-12-07 15:18:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:18:11,628 INFO L225 Difference]: With dead ends: 272 [2019-12-07 15:18:11,628 INFO L226 Difference]: Without dead ends: 187 [2019-12-07 15:18:11,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-07 15:18:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-07 15:18:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2019-12-07 15:18:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-07 15:18:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-12-07 15:18:11,635 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 55 [2019-12-07 15:18:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:18:11,636 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-12-07 15:18:11,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 15:18:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-12-07 15:18:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-07 15:18:11,636 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:18:11,636 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:18:11,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:11,837 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:18:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:18:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2019-12-07 15:18:11,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:18:11,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087753967] [2019-12-07 15:18:11,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:18:11,853 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:18:11,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064471791] [2019-12-07 15:18:11,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/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 15:18:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:18:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:18:12,008 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:18:12,008 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 15:18:12,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:18:12,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:18:12 BoogieIcfgContainer [2019-12-07 15:18:12,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:18:12,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:18:12,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:18:12,277 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:18:12,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:18:07" (3/4) ... [2019-12-07 15:18:12,279 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 15:18:12,324 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a1068e09-da2e-4673-8392-3649c6cd5d64/bin/uautomizer/witness.graphml [2019-12-07 15:18:12,324 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:18:12,326 INFO L168 Benchmark]: Toolchain (without parser) took 5301.33 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 844.0 MB in the end (delta: 102.3 MB). Peak memory consumption was 198.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:18:12,326 INFO L168 Benchmark]: CDTParser took 0.14 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 15:18:12,326 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -145.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 15:18:12,326 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.91 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 15:18:12,326 INFO L168 Benchmark]: Boogie Preprocessor took 20.03 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:18:12,327 INFO L168 Benchmark]: RCFGBuilder took 251.03 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:18:12,327 INFO L168 Benchmark]: TraceAbstraction took 4757.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 855.6 MB in the end (delta: 208.1 MB). Peak memory consumption was 208.1 MB. Max. memory is 11.5 GB. [2019-12-07 15:18:12,327 INFO L168 Benchmark]: Witness Printer took 47.11 ms. Allocated memory is still 1.1 GB. Free memory was 855.6 MB in the beginning and 844.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 11.5 GB. [2019-12-07 15:18:12,329 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 193.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -145.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.91 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 20.03 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 251.03 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4757.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 855.6 MB in the end (delta: 208.1 MB). Peak memory consumption was 208.1 MB. Max. memory is 11.5 GB. * Witness Printer took 47.11 ms. Allocated memory is still 1.1 GB. Free memory was 855.6 MB in the beginning and 844.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L6] int i; [L7] i = 0 VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND FALSE !(i < N) VAL [N=3] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [N=3] [L46] COND TRUE i N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L53] __VERIFIER_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.6s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 579 SDslu, 411 SDs, 0 SdLazy, 718 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 455 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 37966 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1412 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 168/199 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 incorrect! Received shutdown request...