./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 45294379b83c6b60e0b0199955cdf7244f057430 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 16:49:28,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:49:28,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:49:28,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:49:28,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:49:28,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:49:28,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:49:28,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:49:28,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:49:28,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:49:28,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:49:28,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:49:28,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:49:28,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:49:28,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:49:28,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:49:28,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:49:28,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:49:28,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:49:28,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:49:28,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:49:28,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:49:28,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:49:28,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:49:28,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:49:28,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:49:28,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:49:28,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:49:28,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:49:28,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:49:28,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:49:28,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:49:28,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:49:28,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:49:28,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:49:28,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:49:28,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:49:28,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:49:28,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:49:28,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:49:28,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:49:28,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 16:49:28,709 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:49:28,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:49:28,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:49:28,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:49:28,710 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:49:28,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:49:28,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:49:28,712 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:49:28,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:49:28,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:49:28,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:49:28,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:49:28,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:49:28,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:49:28,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:49:28,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:49:28,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:49:28,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:49:28,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:49:28,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:49:28,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:49:28,713 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_3fcefdad-edde-4304-abe8-71176041b374/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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2019-12-07 16:49:28,814 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:49:28,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:49:28,827 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:49:28,828 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:49:28,828 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:49:28,829 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test24-2.c [2019-12-07 16:49:28,874 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/data/1b23760a6/bb0c06ea9f494fa798219412011363e4/FLAGe823ac995 [2019-12-07 16:49:29,324 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:49:29,324 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/sv-benchmarks/c/ldv-regression/test24-2.c [2019-12-07 16:49:29,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/data/1b23760a6/bb0c06ea9f494fa798219412011363e4/FLAGe823ac995 [2019-12-07 16:49:29,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/data/1b23760a6/bb0c06ea9f494fa798219412011363e4 [2019-12-07 16:49:29,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:49:29,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:49:29,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:49:29,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:49:29,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:49:29,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17df66d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29, skipping insertion in model container [2019-12-07 16:49:29,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:49:29,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:49:29,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:49:29,502 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:49:29,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:49:29,524 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:49:29,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29 WrapperNode [2019-12-07 16:49:29,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:49:29,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:49:29,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:49:29,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:49:29,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:49:29,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:49:29,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:49:29,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:49:29,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... [2019-12-07 16:49:29,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:49:29,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:49:29,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:49:29,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:49:29,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:49:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:49:29,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:49:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 16:49:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:49:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:49:29,734 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:49:29,734 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 16:49:29,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:49:29 BoogieIcfgContainer [2019-12-07 16:49:29,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:49:29,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:49:29,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:49:29,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:49:29,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:49:29" (1/3) ... [2019-12-07 16:49:29,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d35708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:49:29, skipping insertion in model container [2019-12-07 16:49:29,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:49:29" (2/3) ... [2019-12-07 16:49:29,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d35708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:49:29, skipping insertion in model container [2019-12-07 16:49:29,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:49:29" (3/3) ... [2019-12-07 16:49:29,740 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-12-07 16:49:29,746 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:49:29,750 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 16:49:29,757 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 16:49:29,772 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:49:29,772 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:49:29,772 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:49:29,772 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:49:29,772 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:49:29,772 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:49:29,773 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:49:29,773 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:49:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-07 16:49:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 16:49:29,785 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:29,786 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:29,786 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-12-07 16:49:29,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:29,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406368505] [2019-12-07 16:49:29,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:29,882 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 16:49:29,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406368505] [2019-12-07 16:49:29,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:49:29,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:49:29,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135404911] [2019-12-07 16:49:29,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 16:49:29,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 16:49:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 16:49:29,897 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-07 16:49:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:29,907 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-12-07 16:49:29,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 16:49:29,908 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-12-07 16:49:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:29,914 INFO L225 Difference]: With dead ends: 30 [2019-12-07 16:49:29,914 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 16:49:29,916 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 16:49:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 16:49:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 16:49:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 16:49:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 16:49:29,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-12-07 16:49:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:29,937 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 16:49:29,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 16:49:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-12-07 16:49:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 16:49:29,938 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:29,938 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:29,938 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-12-07 16:49:29,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:29,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905700619] [2019-12-07 16:49:29,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:29,966 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 16:49:29,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905700619] [2019-12-07 16:49:29,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:49:29,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:49:29,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109831785] [2019-12-07 16:49:29,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:49:29,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:29,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:49:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:49:29,969 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-12-07 16:49:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:29,980 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-12-07 16:49:29,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:49:29,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-07 16:49:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:29,981 INFO L225 Difference]: With dead ends: 24 [2019-12-07 16:49:29,981 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 16:49:29,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 16:49:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 16:49:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 16:49:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 16:49:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 16:49:29,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-12-07 16:49:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:29,985 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 16:49:29,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:49:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 16:49:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 16:49:29,985 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:29,985 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:29,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:29,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-12-07 16:49:29,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:29,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765183631] [2019-12-07 16:49:29,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:30,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765183631] [2019-12-07 16:49:30,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303712613] [2019-12-07 16:49:30,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:30,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 16:49:30,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:30,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:30,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 16:49:30,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745467996] [2019-12-07 16:49:30,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:49:30,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:49:30,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:49:30,090 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-12-07 16:49:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:30,107 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-12-07 16:49:30,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:49:30,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-12-07 16:49:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:30,108 INFO L225 Difference]: With dead ends: 26 [2019-12-07 16:49:30,108 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 16:49:30,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 16:49:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 16:49:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-12-07 16:49:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 16:49:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 16:49:30,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-12-07 16:49:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:30,111 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 16:49:30,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:49:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 16:49:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 16:49:30,112 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:30,112 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:30,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:30,313 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-12-07 16:49:30,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:30,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296897502] [2019-12-07 16:49:30,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:30,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296897502] [2019-12-07 16:49:30,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757586786] [2019-12-07 16:49:30,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:30,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:49:30,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:30,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:49:30,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:30,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:30,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 16:49:30,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704022322] [2019-12-07 16:49:30,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 16:49:30,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 16:49:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:49:30,477 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-12-07 16:49:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:30,493 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-12-07 16:49:30,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:49:30,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-12-07 16:49:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:30,494 INFO L225 Difference]: With dead ends: 28 [2019-12-07 16:49:30,495 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 16:49:30,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:49:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 16:49:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-12-07 16:49:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 16:49:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-12-07 16:49:30,498 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-12-07 16:49:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:30,499 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-12-07 16:49:30,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 16:49:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-12-07 16:49:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 16:49:30,499 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:30,499 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:30,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:30,700 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-12-07 16:49:30,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:30,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644666838] [2019-12-07 16:49:30,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:30,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644666838] [2019-12-07 16:49:30,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783248579] [2019-12-07 16:49:30,813 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:30,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 16:49:30,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:30,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 16:49:30,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:30,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:30,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 16:49:30,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444803328] [2019-12-07 16:49:30,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:49:30,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:49:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:49:30,920 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-12-07 16:49:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:30,940 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-12-07 16:49:30,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:49:30,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-12-07 16:49:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:30,941 INFO L225 Difference]: With dead ends: 30 [2019-12-07 16:49:30,941 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 16:49:30,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:49:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 16:49:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-12-07 16:49:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 16:49:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 16:49:30,945 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-12-07 16:49:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:30,945 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 16:49:30,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:49:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 16:49:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 16:49:30,946 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:30,946 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:31,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:31,147 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:31,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-12-07 16:49:31,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:31,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380333362] [2019-12-07 16:49:31,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:31,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380333362] [2019-12-07 16:49:31,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388024514] [2019-12-07 16:49:31,222 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:31,248 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:49:31,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:31,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:49:31,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:31,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:31,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 16:49:31,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075519902] [2019-12-07 16:49:31,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 16:49:31,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:49:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:49:31,260 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-12-07 16:49:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:31,280 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-12-07 16:49:31,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:49:31,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-12-07 16:49:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:31,281 INFO L225 Difference]: With dead ends: 32 [2019-12-07 16:49:31,281 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 16:49:31,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:49:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 16:49:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-12-07 16:49:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 16:49:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-12-07 16:49:31,284 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-12-07 16:49:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:31,284 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-12-07 16:49:31,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 16:49:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-12-07 16:49:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 16:49:31,285 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:31,285 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:31,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:31,487 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-12-07 16:49:31,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:31,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586926155] [2019-12-07 16:49:31,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:31,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586926155] [2019-12-07 16:49:31,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615109188] [2019-12-07 16:49:31,560 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:31,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 16:49:31,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:31,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:49:31,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:31,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:31,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 16:49:31,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729337770] [2019-12-07 16:49:31,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 16:49:31,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 16:49:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:49:31,609 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-12-07 16:49:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:31,629 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-12-07 16:49:31,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:49:31,630 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-12-07 16:49:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:31,630 INFO L225 Difference]: With dead ends: 34 [2019-12-07 16:49:31,630 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 16:49:31,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:49:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 16:49:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-12-07 16:49:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 16:49:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-12-07 16:49:31,633 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-12-07 16:49:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:31,633 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-12-07 16:49:31,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 16:49:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-12-07 16:49:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 16:49:31,634 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:31,634 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:31,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:31,835 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:31,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-12-07 16:49:31,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:31,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501596993] [2019-12-07 16:49:31,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:31,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501596993] [2019-12-07 16:49:31,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341528777] [2019-12-07 16:49:31,923 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:31,991 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 16:49:31,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:31,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:49:31,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:32,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:32,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-07 16:49:32,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300245695] [2019-12-07 16:49:32,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 16:49:32,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:32,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 16:49:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:49:32,004 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-12-07 16:49:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:32,031 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-12-07 16:49:32,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 16:49:32,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-12-07 16:49:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:32,032 INFO L225 Difference]: With dead ends: 36 [2019-12-07 16:49:32,032 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 16:49:32,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:49:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 16:49:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-12-07 16:49:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:49:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 16:49:32,035 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-12-07 16:49:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:32,035 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 16:49:32,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 16:49:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 16:49:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 16:49:32,036 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:32,036 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:32,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:32,237 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-12-07 16:49:32,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:32,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014411429] [2019-12-07 16:49:32,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:32,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014411429] [2019-12-07 16:49:32,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075782447] [2019-12-07 16:49:32,312 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:32,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 16:49:32,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:32,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:32,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 16:49:32,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344542240] [2019-12-07 16:49:32,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 16:49:32,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 16:49:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:49:32,358 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-12-07 16:49:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:32,389 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-12-07 16:49:32,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 16:49:32,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-12-07 16:49:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:32,390 INFO L225 Difference]: With dead ends: 38 [2019-12-07 16:49:32,390 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 16:49:32,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:49:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 16:49:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-12-07 16:49:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 16:49:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-12-07 16:49:32,393 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-12-07 16:49:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:32,393 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-12-07 16:49:32,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 16:49:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-12-07 16:49:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 16:49:32,394 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:32,394 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:32,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:32,596 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-12-07 16:49:32,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:32,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862180354] [2019-12-07 16:49:32,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:32,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862180354] [2019-12-07 16:49:32,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918919511] [2019-12-07 16:49:32,705 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:32,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:49:32,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:32,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:49:32,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:32,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:32,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 16:49:32,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318090742] [2019-12-07 16:49:32,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 16:49:32,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 16:49:32,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:49:32,763 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-12-07 16:49:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:32,792 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-12-07 16:49:32,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 16:49:32,792 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-12-07 16:49:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:32,793 INFO L225 Difference]: With dead ends: 40 [2019-12-07 16:49:32,793 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 16:49:32,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:49:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 16:49:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-12-07 16:49:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 16:49:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-12-07 16:49:32,796 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-12-07 16:49:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:32,797 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-12-07 16:49:32,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 16:49:32,797 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-12-07 16:49:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 16:49:32,797 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:32,798 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:32,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:32,998 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:32,999 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-12-07 16:49:32,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:32,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643986653] [2019-12-07 16:49:32,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:33,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643986653] [2019-12-07 16:49:33,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306020759] [2019-12-07 16:49:33,062 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:33,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 16:49:33,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:33,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 16:49:33,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:33,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:33,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-07 16:49:33,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568830065] [2019-12-07 16:49:33,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:49:33,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:49:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:49:33,311 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-12-07 16:49:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:33,342 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-12-07 16:49:33,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 16:49:33,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-12-07 16:49:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:33,343 INFO L225 Difference]: With dead ends: 42 [2019-12-07 16:49:33,343 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 16:49:33,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:49:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 16:49:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-12-07 16:49:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 16:49:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 16:49:33,346 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-12-07 16:49:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:33,346 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 16:49:33,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:49:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 16:49:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 16:49:33,347 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:33,347 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:33,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:33,548 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-12-07 16:49:33,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:33,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118265544] [2019-12-07 16:49:33,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:33,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118265544] [2019-12-07 16:49:33,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751941988] [2019-12-07 16:49:33,632 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:33,666 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:49:33,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:33,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 16:49:33,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:33,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:33,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-07 16:49:33,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097789205] [2019-12-07 16:49:33,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 16:49:33,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 16:49:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:49:33,682 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-12-07 16:49:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:33,712 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-12-07 16:49:33,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 16:49:33,713 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-12-07 16:49:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:33,713 INFO L225 Difference]: With dead ends: 44 [2019-12-07 16:49:33,713 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 16:49:33,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:49:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 16:49:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-12-07 16:49:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 16:49:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-12-07 16:49:33,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-12-07 16:49:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:33,718 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-12-07 16:49:33,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 16:49:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-12-07 16:49:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 16:49:33,719 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:33,719 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:33,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:33,919 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-12-07 16:49:33,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:33,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245163255] [2019-12-07 16:49:33,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:34,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245163255] [2019-12-07 16:49:34,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437201249] [2019-12-07 16:49:34,006 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/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 16:49:34,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 16:49:34,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:34,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 16:49:34,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:34,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:34,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 16:49:34,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191637518] [2019-12-07 16:49:34,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 16:49:34,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 16:49:34,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-07 16:49:34,237 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-12-07 16:49:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:34,268 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-12-07 16:49:34,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 16:49:34,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-12-07 16:49:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:34,268 INFO L225 Difference]: With dead ends: 46 [2019-12-07 16:49:34,268 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 16:49:34,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-07 16:49:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 16:49:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-12-07 16:49:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 16:49:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-12-07 16:49:34,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-12-07 16:49:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:34,271 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-12-07 16:49:34,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 16:49:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-12-07 16:49:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 16:49:34,272 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:34,272 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:34,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:34,473 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-12-07 16:49:34,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:34,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914757008] [2019-12-07 16:49:34,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:34,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914757008] [2019-12-07 16:49:34,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256832767] [2019-12-07 16:49:34,566 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:35,418 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 16:49:35,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:35,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:49:35,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:35,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:35,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-07 16:49:35,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840368266] [2019-12-07 16:49:35,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 16:49:35,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:35,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 16:49:35,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:49:35,433 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-12-07 16:49:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:35,464 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-12-07 16:49:35,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 16:49:35,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-12-07 16:49:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:35,465 INFO L225 Difference]: With dead ends: 48 [2019-12-07 16:49:35,465 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 16:49:35,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:49:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 16:49:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-12-07 16:49:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 16:49:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 16:49:35,468 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-12-07 16:49:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:35,468 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 16:49:35,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 16:49:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 16:49:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 16:49:35,468 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:35,468 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:35,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:35,669 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-12-07 16:49:35,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:35,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151151870] [2019-12-07 16:49:35,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:35,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151151870] [2019-12-07 16:49:35,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822093287] [2019-12-07 16:49:35,791 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:35,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 16:49:35,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:35,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:35,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-07 16:49:35,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099910478] [2019-12-07 16:49:35,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 16:49:35,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:35,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 16:49:35,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-07 16:49:35,838 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-12-07 16:49:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:35,868 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-12-07 16:49:35,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 16:49:35,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-12-07 16:49:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:35,869 INFO L225 Difference]: With dead ends: 50 [2019-12-07 16:49:35,869 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 16:49:35,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-07 16:49:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 16:49:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-12-07 16:49:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 16:49:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-12-07 16:49:35,872 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-12-07 16:49:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:35,872 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-12-07 16:49:35,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 16:49:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-12-07 16:49:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 16:49:35,873 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:35,873 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:36,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:36,074 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-12-07 16:49:36,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:36,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306600880] [2019-12-07 16:49:36,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:36,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306600880] [2019-12-07 16:49:36,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574754150] [2019-12-07 16:49:36,225 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:36,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:49:36,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:36,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 16:49:36,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:36,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:36,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-07 16:49:36,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788806952] [2019-12-07 16:49:36,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 16:49:36,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:36,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 16:49:36,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-07 16:49:36,278 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-12-07 16:49:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:36,313 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-12-07 16:49:36,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 16:49:36,313 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-12-07 16:49:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:36,314 INFO L225 Difference]: With dead ends: 52 [2019-12-07 16:49:36,314 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 16:49:36,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-07 16:49:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 16:49:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-12-07 16:49:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 16:49:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-12-07 16:49:36,318 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-12-07 16:49:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:36,318 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-12-07 16:49:36,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 16:49:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-12-07 16:49:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 16:49:36,319 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:36,319 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:36,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:36,520 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:36,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-12-07 16:49:36,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:36,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917548806] [2019-12-07 16:49:36,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:36,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917548806] [2019-12-07 16:49:36,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949473533] [2019-12-07 16:49:36,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:37,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 16:49:37,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:37,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 16:49:37,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:37,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:37,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-07 16:49:37,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580566678] [2019-12-07 16:49:37,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 16:49:37,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 16:49:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-07 16:49:37,869 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-12-07 16:49:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:37,905 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-12-07 16:49:37,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 16:49:37,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-12-07 16:49:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:37,906 INFO L225 Difference]: With dead ends: 54 [2019-12-07 16:49:37,906 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 16:49:37,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-07 16:49:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 16:49:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-12-07 16:49:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 16:49:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 16:49:37,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-12-07 16:49:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:37,909 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 16:49:37,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 16:49:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 16:49:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 16:49:37,910 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:37,910 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:38,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:38,110 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:38,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:38,111 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-12-07 16:49:38,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:38,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200410928] [2019-12-07 16:49:38,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:38,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200410928] [2019-12-07 16:49:38,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659710090] [2019-12-07 16:49:38,261 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:38,293 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:49:38,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:38,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 16:49:38,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:38,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:38,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-07 16:49:38,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908514488] [2019-12-07 16:49:38,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 16:49:38,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:38,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 16:49:38,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-07 16:49:38,306 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-12-07 16:49:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:38,344 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-12-07 16:49:38,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 16:49:38,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-12-07 16:49:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:38,345 INFO L225 Difference]: With dead ends: 56 [2019-12-07 16:49:38,345 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 16:49:38,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-07 16:49:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 16:49:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-12-07 16:49:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 16:49:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-12-07 16:49:38,348 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-12-07 16:49:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:38,348 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-12-07 16:49:38,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 16:49:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-12-07 16:49:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 16:49:38,349 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:38,349 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:38,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:38,550 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-12-07 16:49:38,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:38,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008567464] [2019-12-07 16:49:38,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:38,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008567464] [2019-12-07 16:49:38,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766256825] [2019-12-07 16:49:38,692 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:39,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-07 16:49:39,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:39,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 16:49:39,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:39,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:39,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-07 16:49:39,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304912712] [2019-12-07 16:49:39,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 16:49:39,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:39,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 16:49:39,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-07 16:49:39,614 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-12-07 16:49:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:39,661 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-12-07 16:49:39,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 16:49:39,662 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-12-07 16:49:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:39,662 INFO L225 Difference]: With dead ends: 58 [2019-12-07 16:49:39,662 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 16:49:39,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-07 16:49:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 16:49:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-12-07 16:49:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 16:49:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-12-07 16:49:39,666 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-12-07 16:49:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:39,667 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-12-07 16:49:39,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 16:49:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-12-07 16:49:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-07 16:49:39,667 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:39,667 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:39,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:39,868 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-12-07 16:49:39,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:39,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685362545] [2019-12-07 16:49:39,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:40,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685362545] [2019-12-07 16:49:40,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175696886] [2019-12-07 16:49:40,037 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:44,427 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-07 16:49:44,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:49:44,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 16:49:44,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:44,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:44,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-07 16:49:44,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793093935] [2019-12-07 16:49:44,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 16:49:44,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 16:49:44,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-07 16:49:44,446 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-12-07 16:49:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:44,486 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-12-07 16:49:44,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 16:49:44,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-12-07 16:49:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:44,487 INFO L225 Difference]: With dead ends: 60 [2019-12-07 16:49:44,487 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 16:49:44,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-07 16:49:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 16:49:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-12-07 16:49:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 16:49:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 16:49:44,490 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-12-07 16:49:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:44,490 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 16:49:44,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 16:49:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 16:49:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 16:49:44,490 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:44,490 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:44,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:44,691 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:44,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-12-07 16:49:44,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:44,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284116574] [2019-12-07 16:49:44,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:44,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284116574] [2019-12-07 16:49:44,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76911935] [2019-12-07 16:49:44,895 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:49:44,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 16:49:44,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:49:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:49:44,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:49:44,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-07 16:49:44,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240611463] [2019-12-07 16:49:44,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 16:49:44,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:49:44,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 16:49:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-07 16:49:44,941 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-12-07 16:49:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:49:44,980 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-12-07 16:49:44,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 16:49:44,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-12-07 16:49:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:49:44,981 INFO L225 Difference]: With dead ends: 61 [2019-12-07 16:49:44,981 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 16:49:44,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-07 16:49:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 16:49:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-07 16:49:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 16:49:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-12-07 16:49:44,984 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-12-07 16:49:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:49:44,985 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-12-07 16:49:44,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 16:49:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-12-07 16:49:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 16:49:44,985 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:49:44,985 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:49:45,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:49:45,186 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:49:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:49:45,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-12-07 16:49:45,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:49:45,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836373283] [2019-12-07 16:49:45,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:49:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:49:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:49:45,280 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:49:45,281 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:49:45,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:49:45 BoogieIcfgContainer [2019-12-07 16:49:45,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:49:45,313 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:49:45,313 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:49:45,314 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:49:45,314 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:49:29" (3/4) ... [2019-12-07 16:49:45,315 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:49:45,365 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3fcefdad-edde-4304-abe8-71176041b374/bin/uautomizer/witness.graphml [2019-12-07 16:49:45,365 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:49:45,366 INFO L168 Benchmark]: Toolchain (without parser) took 16026.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 940.7 MB in the beginning and 1.0 GB in the end (delta: -67.4 MB). Peak memory consumption was 92.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:49:45,367 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:49:45,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:49:45,367 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.16 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 16:49:45,367 INFO L168 Benchmark]: Boogie Preprocessor took 15.49 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 16:49:45,367 INFO L168 Benchmark]: RCFGBuilder took 170.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:49:45,368 INFO L168 Benchmark]: TraceAbstraction took 15577.61 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 44.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 71.9 MB). Peak memory consumption was 116.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:49:45,368 INFO L168 Benchmark]: Witness Printer took 51.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2019-12-07 16:49:45,369 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 184.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.16 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.49 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 170.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15577.61 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 44.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 71.9 MB). Peak memory consumption was 116.5 MB. Max. memory is 11.5 GB. * Witness Printer took 51.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 15.5s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, 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, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2660 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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...