./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/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 0.1.23-635dfa2 [2018-12-01 16:14:51,740 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 16:14:51,741 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 16:14:51,749 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 16:14:51,750 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 16:14:51,750 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 16:14:51,751 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 16:14:51,752 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 16:14:51,754 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 16:14:51,754 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 16:14:51,755 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 16:14:51,755 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 16:14:51,756 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 16:14:51,757 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 16:14:51,757 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 16:14:51,758 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 16:14:51,759 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 16:14:51,760 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 16:14:51,761 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 16:14:51,762 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 16:14:51,763 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 16:14:51,764 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 16:14:51,765 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 16:14:51,765 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 16:14:51,766 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 16:14:51,766 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 16:14:51,767 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 16:14:51,767 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 16:14:51,768 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 16:14:51,769 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 16:14:51,769 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 16:14:51,769 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 16:14:51,769 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 16:14:51,770 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 16:14:51,770 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 16:14:51,771 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 16:14:51,771 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 16:14:51,781 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 16:14:51,781 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 16:14:51,782 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 16:14:51,782 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 16:14:51,783 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 16:14:51,783 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 16:14:51,783 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 16:14:51,783 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 16:14:51,784 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 16:14:51,785 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 16:14:51,785 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 16:14:51,785 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 16:14:51,785 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 16:14:51,785 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 16:14:51,785 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 16:14:51,786 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 16:14:51,786 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 16:14:51,786 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 16:14:51,786 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 16:14:51,786 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 16:14:51,786 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 16:14:51,786 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 16:14:51,786 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 16:14:51,787 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/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 [2018-12-01 16:14:51,810 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 16:14:51,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 16:14:51,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 16:14:51,824 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 16:14:51,824 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 16:14:51,825 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c [2018-12-01 16:14:51,863 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/data/c3c157c83/80cb06b4ec644dada4c410523d4b95e7/FLAGc1831a3ff [2018-12-01 16:14:52,214 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 16:14:52,214 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c [2018-12-01 16:14:52,218 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/data/c3c157c83/80cb06b4ec644dada4c410523d4b95e7/FLAGc1831a3ff [2018-12-01 16:14:52,225 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/data/c3c157c83/80cb06b4ec644dada4c410523d4b95e7 [2018-12-01 16:14:52,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 16:14:52,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 16:14:52,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 16:14:52,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 16:14:52,230 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 16:14:52,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f41b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52, skipping insertion in model container [2018-12-01 16:14:52,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 16:14:52,248 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 16:14:52,343 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 16:14:52,348 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 16:14:52,359 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 16:14:52,367 INFO L195 MainTranslator]: Completed translation [2018-12-01 16:14:52,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52 WrapperNode [2018-12-01 16:14:52,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 16:14:52,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 16:14:52,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 16:14:52,368 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 16:14:52,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 16:14:52,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 16:14:52,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 16:14:52,411 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 16:14:52,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... [2018-12-01 16:14:52,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 16:14:52,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 16:14:52,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 16:14:52,428 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 16:14:52,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/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 [2018-12-01 16:14:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-01 16:14:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 16:14:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 16:14:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 16:14:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 16:14:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 16:14:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-01 16:14:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 16:14:52,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 16:14:52,462 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-12-01 16:14:52,462 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-12-01 16:14:52,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-01 16:14:52,568 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 16:14:52,568 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-01 16:14:52,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:14:52 BoogieIcfgContainer [2018-12-01 16:14:52,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 16:14:52,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 16:14:52,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 16:14:52,571 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 16:14:52,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 04:14:52" (1/3) ... [2018-12-01 16:14:52,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192c8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 04:14:52, skipping insertion in model container [2018-12-01 16:14:52,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:14:52" (2/3) ... [2018-12-01 16:14:52,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192c8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 04:14:52, skipping insertion in model container [2018-12-01 16:14:52,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:14:52" (3/3) ... [2018-12-01 16:14:52,574 INFO L112 eAbstractionObserver]: Analyzing ICFG test24_false-unreach-call.c [2018-12-01 16:14:52,583 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 16:14:52,589 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 16:14:52,604 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 16:14:52,626 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 16:14:52,626 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 16:14:52,626 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 16:14:52,626 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 16:14:52,626 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 16:14:52,627 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 16:14:52,627 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 16:14:52,627 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 16:14:52,627 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 16:14:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-12-01 16:14:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-01 16:14:52,644 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:52,645 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:52,646 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:52,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:52,651 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2018-12-01 16:14:52,652 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:52,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:52,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:52,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:52,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 16:14:52,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-01 16:14:52,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-01 16:14:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-01 16:14:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 16:14:52,747 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-12-01 16:14:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:52,758 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-12-01 16:14:52,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-01 16:14:52,758 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-12-01 16:14:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:52,764 INFO L225 Difference]: With dead ends: 42 [2018-12-01 16:14:52,764 INFO L226 Difference]: Without dead ends: 20 [2018-12-01 16:14:52,766 INFO L631 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 [2018-12-01 16:14:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-01 16:14:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-01 16:14:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-01 16:14:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-01 16:14:52,786 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-12-01 16:14:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:52,786 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-01 16:14:52,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-01 16:14:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-01 16:14:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-01 16:14:52,787 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:52,787 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:52,787 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:52,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2018-12-01 16:14:52,788 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:52,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:52,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:52,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:52,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 16:14:52,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 16:14:52,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-01 16:14:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-01 16:14:52,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 16:14:52,828 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2018-12-01 16:14:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:52,842 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-12-01 16:14:52,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-01 16:14:52,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-12-01 16:14:52,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:52,843 INFO L225 Difference]: With dead ends: 34 [2018-12-01 16:14:52,843 INFO L226 Difference]: Without dead ends: 22 [2018-12-01 16:14:52,843 INFO L631 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 [2018-12-01 16:14:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-01 16:14:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-01 16:14:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 16:14:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-01 16:14:52,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-12-01 16:14:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:52,846 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-01 16:14:52,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-01 16:14:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-01 16:14:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-01 16:14:52,847 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:52,847 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:52,847 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:52,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:52,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2018-12-01 16:14:52,847 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:52,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:52,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:52,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:52,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:52,878 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:52,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:52,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:52,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:52,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-01 16:14:52,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 16:14:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 16:14:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-01 16:14:52,934 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-12-01 16:14:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:52,952 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-01 16:14:52,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 16:14:52,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-01 16:14:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:52,953 INFO L225 Difference]: With dead ends: 36 [2018-12-01 16:14:52,954 INFO L226 Difference]: Without dead ends: 24 [2018-12-01 16:14:52,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-01 16:14:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-01 16:14:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-01 16:14:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-01 16:14:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-01 16:14:52,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-12-01 16:14:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:52,958 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-01 16:14:52,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 16:14:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-01 16:14:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-01 16:14:52,958 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:52,959 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:52,959 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:52,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2018-12-01 16:14:52,959 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:52,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:52,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:52,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 16:14:53,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 16:14:53,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:53,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:53,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-12-01 16:14:53,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 16:14:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 16:14:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-01 16:14:53,050 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2018-12-01 16:14:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:53,065 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-12-01 16:14:53,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 16:14:53,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-12-01 16:14:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:53,066 INFO L225 Difference]: With dead ends: 38 [2018-12-01 16:14:53,066 INFO L226 Difference]: Without dead ends: 26 [2018-12-01 16:14:53,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-01 16:14:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-01 16:14:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-01 16:14:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-01 16:14:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-01 16:14:53,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-12-01 16:14:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:53,068 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-01 16:14:53,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 16:14:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-01 16:14:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-01 16:14:53,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:53,069 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:53,069 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:53,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2018-12-01 16:14:53,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:53,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:53,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:53,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:53,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 16:14:53,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-01 16:14:53,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:53,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:53,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-01 16:14:53,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 16:14:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 16:14:53,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-01 16:14:53,152 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2018-12-01 16:14:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:53,168 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2018-12-01 16:14:53,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 16:14:53,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-12-01 16:14:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:53,169 INFO L225 Difference]: With dead ends: 40 [2018-12-01 16:14:53,169 INFO L226 Difference]: Without dead ends: 28 [2018-12-01 16:14:53,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-01 16:14:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-01 16:14:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-12-01 16:14:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-01 16:14:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-01 16:14:53,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-12-01 16:14:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:53,172 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-01 16:14:53,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 16:14:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-01 16:14:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-01 16:14:53,172 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:53,172 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:53,172 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:53,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2018-12-01 16:14:53,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:53,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:53,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:53,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:53,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 16:14:53,225 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 16:14:53,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:53,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:53,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-01 16:14:53,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 16:14:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 16:14:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-01 16:14:53,251 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-12-01 16:14:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:53,269 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-12-01 16:14:53,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 16:14:53,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-12-01 16:14:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:53,270 INFO L225 Difference]: With dead ends: 42 [2018-12-01 16:14:53,270 INFO L226 Difference]: Without dead ends: 30 [2018-12-01 16:14:53,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-01 16:14:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-01 16:14:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-12-01 16:14:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-01 16:14:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-01 16:14:53,272 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-12-01 16:14:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:53,272 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-01 16:14:53,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 16:14:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-01 16:14:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-01 16:14:53,273 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:53,273 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:53,273 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:53,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2018-12-01 16:14:53,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:53,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:53,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:53,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:53,312 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 16:14:53,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-01 16:14:53,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:53,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:53,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-01 16:14:53,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 16:14:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 16:14:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-01 16:14:53,369 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2018-12-01 16:14:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:53,389 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-12-01 16:14:53,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 16:14:53,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-12-01 16:14:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:53,389 INFO L225 Difference]: With dead ends: 44 [2018-12-01 16:14:53,389 INFO L226 Difference]: Without dead ends: 32 [2018-12-01 16:14:53,390 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-01 16:14:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-01 16:14:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-12-01 16:14:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-01 16:14:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-12-01 16:14:53,392 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-12-01 16:14:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:53,392 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-12-01 16:14:53,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 16:14:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-12-01 16:14:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-01 16:14:53,393 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:53,393 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:53,393 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:53,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2018-12-01 16:14:53,393 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:53,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:53,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:53,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:53,446 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 16:14:53,527 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-01 16:14:53,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:53,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:53,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-01 16:14:53,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 16:14:53,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 16:14:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-01 16:14:53,556 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2018-12-01 16:14:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:53,577 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-12-01 16:14:53,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 16:14:53,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-12-01 16:14:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:53,579 INFO L225 Difference]: With dead ends: 46 [2018-12-01 16:14:53,579 INFO L226 Difference]: Without dead ends: 34 [2018-12-01 16:14:53,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-01 16:14:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-01 16:14:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-01 16:14:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-01 16:14:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-01 16:14:53,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-12-01 16:14:53,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:53,582 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-01 16:14:53,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 16:14:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-01 16:14:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-01 16:14:53,583 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:53,583 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:53,583 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:53,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:53,583 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2018-12-01 16:14:53,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:53,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:53,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:53,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:53,635 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:53,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-01 16:14:53,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 16:14:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 16:14:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-01 16:14:53,683 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-12-01 16:14:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:53,710 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-12-01 16:14:53,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 16:14:53,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-12-01 16:14:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:53,711 INFO L225 Difference]: With dead ends: 48 [2018-12-01 16:14:53,711 INFO L226 Difference]: Without dead ends: 36 [2018-12-01 16:14:53,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-01 16:14:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-01 16:14:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-12-01 16:14:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-01 16:14:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-01 16:14:53,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-12-01 16:14:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:53,714 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-01 16:14:53,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 16:14:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-01 16:14:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-01 16:14:53,715 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:53,715 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:53,715 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:53,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2018-12-01 16:14:53,715 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:53,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:53,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:53,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:53,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 16:14:53,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 16:14:53,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:53,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:53,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-01 16:14:53,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 16:14:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 16:14:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-01 16:14:53,824 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2018-12-01 16:14:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:53,845 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-12-01 16:14:53,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 16:14:53,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-12-01 16:14:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:53,846 INFO L225 Difference]: With dead ends: 50 [2018-12-01 16:14:53,846 INFO L226 Difference]: Without dead ends: 38 [2018-12-01 16:14:53,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-01 16:14:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-01 16:14:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-12-01 16:14:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-01 16:14:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-12-01 16:14:53,848 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-12-01 16:14:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:53,848 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-12-01 16:14:53,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 16:14:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-12-01 16:14:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-01 16:14:53,849 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:53,849 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:53,849 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:53,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:53,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2018-12-01 16:14:53,849 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:53,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:53,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:53,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:53,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:53,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:53,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 16:14:54,051 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-01 16:14:54,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:54,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:54,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:54,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-01 16:14:54,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-01 16:14:54,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-01 16:14:54,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-01 16:14:54,080 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2018-12-01 16:14:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:54,115 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-12-01 16:14:54,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 16:14:54,115 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-12-01 16:14:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:54,116 INFO L225 Difference]: With dead ends: 52 [2018-12-01 16:14:54,116 INFO L226 Difference]: Without dead ends: 40 [2018-12-01 16:14:54,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-01 16:14:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-01 16:14:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-12-01 16:14:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-01 16:14:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-01 16:14:54,119 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-12-01 16:14:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:54,119 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-01 16:14:54,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-01 16:14:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-01 16:14:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-01 16:14:54,119 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:54,119 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:54,120 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:54,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:54,120 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2018-12-01 16:14:54,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:54,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:54,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:54,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:54,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:54,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:54,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:54,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 16:14:54,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 16:14:54,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:54,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:54,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:54,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-01 16:14:54,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 16:14:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 16:14:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-01 16:14:54,247 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2018-12-01 16:14:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:54,276 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-12-01 16:14:54,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 16:14:54,276 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-12-01 16:14:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:54,277 INFO L225 Difference]: With dead ends: 54 [2018-12-01 16:14:54,277 INFO L226 Difference]: Without dead ends: 42 [2018-12-01 16:14:54,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-01 16:14:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-01 16:14:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-12-01 16:14:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-01 16:14:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-01 16:14:54,280 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-12-01 16:14:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:54,280 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-01 16:14:54,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 16:14:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-01 16:14:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-01 16:14:54,280 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:54,281 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:54,281 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:54,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2018-12-01 16:14:54,281 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:54,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:54,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:54,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:54,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:54,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:54,366 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:54,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 16:14:54,517 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-01 16:14:54,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:54,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:54,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:54,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-01 16:14:54,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 16:14:54,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 16:14:54,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-12-01 16:14:54,547 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-12-01 16:14:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:54,575 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-12-01 16:14:54,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-01 16:14:54,576 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-12-01 16:14:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:54,576 INFO L225 Difference]: With dead ends: 56 [2018-12-01 16:14:54,576 INFO L226 Difference]: Without dead ends: 44 [2018-12-01 16:14:54,577 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-12-01 16:14:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-01 16:14:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-12-01 16:14:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-01 16:14:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-12-01 16:14:54,579 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-12-01 16:14:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:54,579 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-12-01 16:14:54,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 16:14:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-12-01 16:14:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-01 16:14:54,580 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:54,580 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:54,580 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:54,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2018-12-01 16:14:54,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:54,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:54,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:54,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:54,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:54,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:54,680 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:54,686 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 16:14:55,530 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-01 16:14:55,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:55,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:55,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:55,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-12-01 16:14:55,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 16:14:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 16:14:55,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-01 16:14:55,563 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2018-12-01 16:14:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:55,591 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2018-12-01 16:14:55,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 16:14:55,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-12-01 16:14:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:55,592 INFO L225 Difference]: With dead ends: 58 [2018-12-01 16:14:55,592 INFO L226 Difference]: Without dead ends: 46 [2018-12-01 16:14:55,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-01 16:14:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-01 16:14:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-12-01 16:14:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-01 16:14:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-01 16:14:55,594 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-12-01 16:14:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:55,594 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-01 16:14:55,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 16:14:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-01 16:14:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-01 16:14:55,595 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:55,595 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:55,595 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:55,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2018-12-01 16:14:55,595 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:55,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:55,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:55,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:55,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:55,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:55,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:55,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:55,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:55,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:55,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-12-01 16:14:55,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-01 16:14:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-01 16:14:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-12-01 16:14:55,773 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2018-12-01 16:14:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:55,811 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-12-01 16:14:55,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 16:14:55,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-12-01 16:14:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:55,812 INFO L225 Difference]: With dead ends: 60 [2018-12-01 16:14:55,812 INFO L226 Difference]: Without dead ends: 48 [2018-12-01 16:14:55,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-12-01 16:14:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-01 16:14:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-12-01 16:14:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-01 16:14:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-12-01 16:14:55,815 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-12-01 16:14:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:55,815 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-12-01 16:14:55,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-01 16:14:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-12-01 16:14:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-01 16:14:55,815 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:55,815 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:55,816 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:55,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2018-12-01 16:14:55,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:55,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:55,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:55,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:14:55,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:55,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:55,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:55,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 16:14:55,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 16:14:55,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:55,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:55,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:55,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-12-01 16:14:55,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-01 16:14:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-01 16:14:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-01 16:14:55,963 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2018-12-01 16:14:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:55,994 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-12-01 16:14:55,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-01 16:14:55,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-12-01 16:14:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:55,994 INFO L225 Difference]: With dead ends: 62 [2018-12-01 16:14:55,994 INFO L226 Difference]: Without dead ends: 50 [2018-12-01 16:14:55,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-01 16:14:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-01 16:14:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-12-01 16:14:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-01 16:14:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-12-01 16:14:55,997 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-12-01 16:14:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:55,997 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-12-01 16:14:55,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-01 16:14:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-12-01 16:14:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-01 16:14:55,997 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:55,998 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:55,998 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:55,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2018-12-01 16:14:55,998 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:55,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:55,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:55,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:55,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:56,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:56,103 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:56,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 16:14:57,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-01 16:14:57,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:57,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:57,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:57,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-12-01 16:14:57,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-01 16:14:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-01 16:14:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-12-01 16:14:57,244 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2018-12-01 16:14:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:57,278 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2018-12-01 16:14:57,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-01 16:14:57,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-12-01 16:14:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:57,279 INFO L225 Difference]: With dead ends: 64 [2018-12-01 16:14:57,279 INFO L226 Difference]: Without dead ends: 52 [2018-12-01 16:14:57,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-12-01 16:14:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-01 16:14:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2018-12-01 16:14:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-01 16:14:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-12-01 16:14:57,281 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-12-01 16:14:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:57,281 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-12-01 16:14:57,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-01 16:14:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-12-01 16:14:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-01 16:14:57,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:57,282 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:57,282 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:57,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:57,282 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2018-12-01 16:14:57,282 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:57,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:57,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:57,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:57,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:57,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:57,397 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:57,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 16:14:57,423 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 16:14:57,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:57,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:57,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:57,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-12-01 16:14:57,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-01 16:14:57,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-01 16:14:57,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-01 16:14:57,455 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2018-12-01 16:14:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:57,489 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-12-01 16:14:57,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-01 16:14:57,489 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-12-01 16:14:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:57,489 INFO L225 Difference]: With dead ends: 66 [2018-12-01 16:14:57,489 INFO L226 Difference]: Without dead ends: 54 [2018-12-01 16:14:57,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-01 16:14:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-01 16:14:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-12-01 16:14:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-01 16:14:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-12-01 16:14:57,492 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-12-01 16:14:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:57,492 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-12-01 16:14:57,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-01 16:14:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-12-01 16:14:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-01 16:14:57,493 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:57,493 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:57,493 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:57,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:57,493 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2018-12-01 16:14:57,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:57,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:57,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:57,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:57,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:57,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:57,619 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:57,625 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 16:14:58,768 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-01 16:14:58,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:14:58,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:14:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:58,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:14:58,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-12-01 16:14:58,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-01 16:14:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-01 16:14:58,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-01 16:14:58,808 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2018-12-01 16:14:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:14:58,852 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-12-01 16:14:58,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-01 16:14:58,852 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-12-01 16:14:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:14:58,853 INFO L225 Difference]: With dead ends: 68 [2018-12-01 16:14:58,853 INFO L226 Difference]: Without dead ends: 56 [2018-12-01 16:14:58,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-01 16:14:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-01 16:14:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-12-01 16:14:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-01 16:14:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-12-01 16:14:58,855 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-12-01 16:14:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:14:58,855 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-12-01 16:14:58,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-01 16:14:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-12-01 16:14:58,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-01 16:14:58,856 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:14:58,856 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:14:58,856 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:14:58,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:14:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2018-12-01 16:14:58,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:14:58,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:14:58,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:58,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:14:58,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:14:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:14:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:14:58,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:14:58,979 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:14:58,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 16:15:03,079 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-01 16:15:03,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 16:15:03,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:15:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:15:03,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:15:03,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-12-01 16:15:03,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-01 16:15:03,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-01 16:15:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-01 16:15:03,117 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2018-12-01 16:15:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:15:03,151 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2018-12-01 16:15:03,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-01 16:15:03,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-12-01 16:15:03,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:15:03,151 INFO L225 Difference]: With dead ends: 70 [2018-12-01 16:15:03,151 INFO L226 Difference]: Without dead ends: 58 [2018-12-01 16:15:03,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-01 16:15:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-01 16:15:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-12-01 16:15:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-01 16:15:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-12-01 16:15:03,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-12-01 16:15:03,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:15:03,153 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-12-01 16:15:03,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-01 16:15:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-12-01 16:15:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-01 16:15:03,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:15:03,154 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:15:03,154 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:15:03,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:15:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2018-12-01 16:15:03,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:15:03,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:15:03,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:15:03,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 16:15:03,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:15:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:15:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:15:03,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 16:15:03,296 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 16:15:03,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:15:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 16:15:03,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 16:15:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 16:15:03,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 16:15:03,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-12-01 16:15:03,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-01 16:15:03,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-01 16:15:03,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-12-01 16:15:03,357 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2018-12-01 16:15:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 16:15:03,399 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-12-01 16:15:03,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-01 16:15:03,399 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-12-01 16:15:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 16:15:03,399 INFO L225 Difference]: With dead ends: 71 [2018-12-01 16:15:03,399 INFO L226 Difference]: Without dead ends: 59 [2018-12-01 16:15:03,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-12-01 16:15:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-01 16:15:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-01 16:15:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-01 16:15:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-12-01 16:15:03,401 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-12-01 16:15:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 16:15:03,401 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-12-01 16:15:03,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-01 16:15:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-12-01 16:15:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-01 16:15:03,402 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 16:15:03,402 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 16:15:03,402 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 16:15:03,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 16:15:03,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2018-12-01 16:15:03,402 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 16:15:03,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 16:15:03,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:15:03,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 16:15:03,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 16:15:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 16:15:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 16:15:03,462 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 16:15:03,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 04:15:03 BoogieIcfgContainer [2018-12-01 16:15:03,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 16:15:03,486 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 16:15:03,486 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 16:15:03,486 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 16:15:03,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:14:52" (3/4) ... [2018-12-01 16:15:03,488 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-01 16:15:03,525 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0afd71c8-c26e-413d-b663-8d137daeb446/bin-2019/uautomizer/witness.graphml [2018-12-01 16:15:03,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 16:15:03,526 INFO L168 Benchmark]: Toolchain (without parser) took 11298.83 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 267.4 MB). Free memory was 962.4 MB in the beginning and 1.1 GB in the end (delta: -89.0 MB). Peak memory consumption was 178.4 MB. Max. memory is 11.5 GB. [2018-12-01 16:15:03,527 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 16:15:03,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.30 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 16:15:03,528 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 92.3 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -134.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-12-01 16:15:03,528 INFO L168 Benchmark]: Boogie Preprocessor took 17.09 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-12-01 16:15:03,528 INFO L168 Benchmark]: RCFGBuilder took 140.16 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: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. [2018-12-01 16:15:03,528 INFO L168 Benchmark]: TraceAbstraction took 10917.05 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 175.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.2 MB). Peak memory consumption was 178.3 MB. Max. memory is 11.5 GB. [2018-12-01 16:15:03,528 INFO L168 Benchmark]: Witness Printer took 39.63 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. [2018-12-01 16:15:03,530 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.30 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 92.3 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -134.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.09 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 140.16 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: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10917.05 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 175.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.2 MB). Peak memory consumption was 178.3 MB. Max. memory is 11.5 GB. * Witness Printer took 39.63 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 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 VAL [ad1={162:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={162:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={162:0}, 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) VAL [\read(*pa)=0, ad1={162:0}, ad2={162:0}, i=10, j=20, pa={162:0}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={162:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={162:0}, ad2={162:0}, check(ad1, i)=0, i=10, j=20, pa={162:0}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={162:0}, ad2={162:0}, i=10, j=20, pa={162:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. UNSAFE Result, 10.8s OverallTime, 22 OverallIterations, 20 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 407 SDtfs, 210 SDslu, 2720 SDs, 0 SdLazy, 643 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 955 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 1537 NumberOfCodeBlocks, 1537 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1439 ConstructedInterpolants, 0 QuantifiedInterpolants, 125333 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3059 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...