./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum4_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum4_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 311ef440fcf709cae5d6f2d3b14d0a45913d759b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum4_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 311ef440fcf709cae5d6f2d3b14d0a45913d759b ....................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: 1 --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:04:22,968 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:04:22,970 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:04:22,979 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:04:22,979 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:04:22,980 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:04:22,981 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:04:22,983 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:04:22,984 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:04:22,985 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:04:22,986 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:04:22,986 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:04:22,987 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:04:22,987 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:04:22,988 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:04:22,989 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:04:22,990 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:04:22,991 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:04:22,993 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:04:22,994 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:04:22,994 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:04:22,995 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:04:22,997 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:04:22,997 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:04:22,997 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:04:22,998 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:04:22,999 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:04:22,999 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:04:23,000 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:04:23,001 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:04:23,001 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:04:23,002 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:04:23,002 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:04:23,002 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:04:23,003 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:04:23,004 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:04:23,004 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 21:04:23,014 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:04:23,015 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:04:23,015 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:04:23,015 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:04:23,016 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:04:23,016 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:04:23,016 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:04:23,016 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:04:23,016 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:04:23,017 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:04:23,018 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:04:23,018 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:04:23,018 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:04:23,018 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:04:23,018 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:04:23,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:04:23,018 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:04:23,019 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:04:23,019 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:04:23,019 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:04:23,019 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:04:23,019 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:04:23,019 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_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 -> 311ef440fcf709cae5d6f2d3b14d0a45913d759b [2018-10-26 21:04:23,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:04:23,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:04:23,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:04:23,064 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:04:23,064 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:04:23,065 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/../../sv-benchmarks/c/array-crafted/zero_sum4_true-unreach-call.c [2018-10-26 21:04:23,114 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/cb59112b5/9851fca695dc452cbe44d90aa4369013/FLAG089e3a448 [2018-10-26 21:04:23,485 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:04:23,486 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/sv-benchmarks/c/array-crafted/zero_sum4_true-unreach-call.c [2018-10-26 21:04:23,491 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/cb59112b5/9851fca695dc452cbe44d90aa4369013/FLAG089e3a448 [2018-10-26 21:04:23,502 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/cb59112b5/9851fca695dc452cbe44d90aa4369013 [2018-10-26 21:04:23,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:04:23,506 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:04:23,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:04:23,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:04:23,510 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:04:23,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ba8991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23, skipping insertion in model container [2018-10-26 21:04:23,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:04:23,538 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:04:23,657 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:04:23,660 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:04:23,680 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:04:23,696 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:04:23,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23 WrapperNode [2018-10-26 21:04:23,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:04:23,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:04:23,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:04:23,697 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:04:23,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... [2018-10-26 21:04:23,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:04:23,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:04:23,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:04:23,732 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:04:23,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:04:23,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:04:23,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:04:23,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 21:04:23,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-26 21:04:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-26 21:04:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:04:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:04:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-10-26 21:04:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-26 21:04:24,400 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:04:24,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:04:24 BoogieIcfgContainer [2018-10-26 21:04:24,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:04:24,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:04:24,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:04:24,404 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:04:24,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:04:23" (1/3) ... [2018-10-26 21:04:24,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da51caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:04:24, skipping insertion in model container [2018-10-26 21:04:24,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:04:23" (2/3) ... [2018-10-26 21:04:24,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da51caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:04:24, skipping insertion in model container [2018-10-26 21:04:24,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:04:24" (3/3) ... [2018-10-26 21:04:24,408 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum4_true-unreach-call.c [2018-10-26 21:04:24,416 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:04:24,423 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:04:24,437 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:04:24,480 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:04:24,481 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:04:24,481 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:04:24,481 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:04:24,481 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:04:24,481 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:04:24,481 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:04:24,482 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:04:24,482 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:04:24,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-10-26 21:04:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-26 21:04:24,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:24,511 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:24,515 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:24,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash 743434283, now seen corresponding path program 1 times [2018-10-26 21:04:24,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:24,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:24,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:24,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:04:24,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:04:24,636 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:04:24,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 21:04:24,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 21:04:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 21:04:24,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 21:04:24,658 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 2 states. [2018-10-26 21:04:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:04:24,678 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2018-10-26 21:04:24,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 21:04:24,679 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2018-10-26 21:04:24,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:04:24,686 INFO L225 Difference]: With dead ends: 126 [2018-10-26 21:04:24,686 INFO L226 Difference]: Without dead ends: 61 [2018-10-26 21:04:24,689 INFO L605 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 [2018-10-26 21:04:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-26 21:04:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-26 21:04:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-26 21:04:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2018-10-26 21:04:24,722 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 28 [2018-10-26 21:04:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:04:24,723 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2018-10-26 21:04:24,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 21:04:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2018-10-26 21:04:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-26 21:04:24,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:24,724 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:24,724 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:24,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1080514441, now seen corresponding path program 1 times [2018-10-26 21:04:24,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:24,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:24,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:24,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:04:24,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:04:24,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:04:24,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:04:24,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:04:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:04:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:04:24,854 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 5 states. [2018-10-26 21:04:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:04:25,161 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2018-10-26 21:04:25,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:04:25,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-10-26 21:04:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:04:25,163 INFO L225 Difference]: With dead ends: 105 [2018-10-26 21:04:25,163 INFO L226 Difference]: Without dead ends: 100 [2018-10-26 21:04:25,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:04:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-26 21:04:25,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2018-10-26 21:04:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-26 21:04:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2018-10-26 21:04:25,173 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 36 [2018-10-26 21:04:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:04:25,174 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2018-10-26 21:04:25,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:04:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2018-10-26 21:04:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-26 21:04:25,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:25,175 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:25,179 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:25,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:25,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1422827997, now seen corresponding path program 1 times [2018-10-26 21:04:25,179 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:25,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:25,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:25,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:04:25,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 21:04:25,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:04:25,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:04:25,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:04:25,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:04:25,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:04:25,243 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 4 states. [2018-10-26 21:04:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:04:25,529 INFO L93 Difference]: Finished difference Result 168 states and 195 transitions. [2018-10-26 21:04:25,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:04:25,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-10-26 21:04:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:04:25,531 INFO L225 Difference]: With dead ends: 168 [2018-10-26 21:04:25,531 INFO L226 Difference]: Without dead ends: 101 [2018-10-26 21:04:25,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:04:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-26 21:04:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2018-10-26 21:04:25,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-26 21:04:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2018-10-26 21:04:25,540 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 41 [2018-10-26 21:04:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:04:25,540 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2018-10-26 21:04:25,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:04:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2018-10-26 21:04:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-26 21:04:25,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:25,542 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:25,542 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:25,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:25,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1128659581, now seen corresponding path program 1 times [2018-10-26 21:04:25,542 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:25,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:25,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:25,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:04:25,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-26 21:04:25,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:04:25,625 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:04:25,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:04:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:25,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:04:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-26 21:04:25,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:04:25,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-26 21:04:25,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:04:25,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:04:25,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:04:25,801 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 7 states. [2018-10-26 21:04:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:04:26,334 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2018-10-26 21:04:26,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 21:04:26,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2018-10-26 21:04:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:04:26,337 INFO L225 Difference]: With dead ends: 202 [2018-10-26 21:04:26,337 INFO L226 Difference]: Without dead ends: 141 [2018-10-26 21:04:26,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:04:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-26 21:04:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 117. [2018-10-26 21:04:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-26 21:04:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-10-26 21:04:26,348 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 76 [2018-10-26 21:04:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:04:26,348 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-10-26 21:04:26,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:04:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-10-26 21:04:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-26 21:04:26,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:26,351 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:26,351 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:26,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -157921545, now seen corresponding path program 2 times [2018-10-26 21:04:26,352 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:26,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:26,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:26,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:04:26,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:27,558 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2018-10-26 21:04:27,811 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-10-26 21:04:28,021 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-10-26 21:04:28,381 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2018-10-26 21:04:29,751 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2018-10-26 21:04:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:04:31,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:04:31,848 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:04:31,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:04:31,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:04:31,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:04:31,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:04:32,974 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-10-26 21:04:32,976 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-10-26 21:04:32,976 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 21:04:32,977 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:04:32,978 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:04:32,978 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-10-26 21:04:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:04:33,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:04:33,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 30] total 82 [2018-10-26 21:04:33,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-26 21:04:33,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-26 21:04:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=6040, Unknown=0, NotChecked=0, Total=6642 [2018-10-26 21:04:33,107 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 82 states. [2018-10-26 21:04:34,093 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2018-10-26 21:04:35,077 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2018-10-26 21:04:35,722 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2018-10-26 21:04:36,168 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2018-10-26 21:04:36,715 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2018-10-26 21:04:36,968 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2018-10-26 21:04:37,145 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2018-10-26 21:04:37,639 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2018-10-26 21:04:37,949 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2018-10-26 21:04:38,278 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2018-10-26 21:04:39,041 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2018-10-26 21:04:39,650 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2018-10-26 21:04:39,949 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2018-10-26 21:04:41,004 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2018-10-26 21:04:41,240 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2018-10-26 21:04:42,270 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2018-10-26 21:04:42,882 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2018-10-26 21:04:44,242 WARN L179 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2018-10-26 21:04:44,851 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2018-10-26 21:04:45,164 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2018-10-26 21:04:45,859 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2018-10-26 21:04:46,135 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2018-10-26 21:04:46,629 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2018-10-26 21:04:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:04:46,789 INFO L93 Difference]: Finished difference Result 357 states and 384 transitions. [2018-10-26 21:04:46,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-26 21:04:46,790 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 116 [2018-10-26 21:04:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:04:46,792 INFO L225 Difference]: With dead ends: 357 [2018-10-26 21:04:46,792 INFO L226 Difference]: Without dead ends: 352 [2018-10-26 21:04:46,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 85 SyntacticMatches, 26 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=3641, Invalid=23091, Unknown=0, NotChecked=0, Total=26732 [2018-10-26 21:04:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-10-26 21:04:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 273. [2018-10-26 21:04:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-10-26 21:04:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 294 transitions. [2018-10-26 21:04:46,826 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 294 transitions. Word has length 116 [2018-10-26 21:04:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:04:46,827 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 294 transitions. [2018-10-26 21:04:46,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-26 21:04:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 294 transitions. [2018-10-26 21:04:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-26 21:04:46,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:46,831 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:46,831 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:46,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:46,832 INFO L82 PathProgramCache]: Analyzing trace with hash 315951965, now seen corresponding path program 3 times [2018-10-26 21:04:46,832 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:46,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:46,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:46,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:04:46,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-10-26 21:04:46,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:04:46,968 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:04:46,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:04:47,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 21:04:47,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:04:47,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:04:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-10-26 21:04:47,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:04:47,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-26 21:04:47,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 21:04:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 21:04:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-10-26 21:04:47,106 INFO L87 Difference]: Start difference. First operand 273 states and 294 transitions. Second operand 13 states. [2018-10-26 21:04:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:04:47,458 INFO L93 Difference]: Finished difference Result 589 states and 634 transitions. [2018-10-26 21:04:47,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:04:47,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2018-10-26 21:04:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:04:47,460 INFO L225 Difference]: With dead ends: 589 [2018-10-26 21:04:47,460 INFO L226 Difference]: Without dead ends: 285 [2018-10-26 21:04:47,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-10-26 21:04:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-26 21:04:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 248. [2018-10-26 21:04:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-26 21:04:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 262 transitions. [2018-10-26 21:04:47,495 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 262 transitions. Word has length 121 [2018-10-26 21:04:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:04:47,496 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 262 transitions. [2018-10-26 21:04:47,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 21:04:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 262 transitions. [2018-10-26 21:04:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-26 21:04:47,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:47,499 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:47,499 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:47,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash 889184314, now seen corresponding path program 4 times [2018-10-26 21:04:47,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:47,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:47,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:47,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:04:47,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-26 21:04:47,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:04:47,595 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:04:47,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:04:47,623 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:04:47,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:04:47,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:04:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-26 21:04:47,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:04:47,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-26 21:04:47,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 21:04:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 21:04:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-26 21:04:47,775 INFO L87 Difference]: Start difference. First operand 248 states and 262 transitions. Second operand 13 states. [2018-10-26 21:04:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:04:48,092 INFO L93 Difference]: Finished difference Result 279 states and 293 transitions. [2018-10-26 21:04:48,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 21:04:48,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 126 [2018-10-26 21:04:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:04:48,094 INFO L225 Difference]: With dead ends: 279 [2018-10-26 21:04:48,094 INFO L226 Difference]: Without dead ends: 196 [2018-10-26 21:04:48,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2018-10-26 21:04:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-26 21:04:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2018-10-26 21:04:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-26 21:04:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 164 transitions. [2018-10-26 21:04:48,104 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 164 transitions. Word has length 126 [2018-10-26 21:04:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:04:48,104 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 164 transitions. [2018-10-26 21:04:48,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 21:04:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 164 transitions. [2018-10-26 21:04:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-26 21:04:48,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:04:48,106 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:04:48,107 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:04:48,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:04:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1388969987, now seen corresponding path program 5 times [2018-10-26 21:04:48,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:04:48,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:04:48,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:48,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:04:48,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:04:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:04:51,585 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2018-10-26 21:04:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:04:54,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:04:54,054 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:04:54,061 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:04:54,096 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-26 21:04:54,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:04:54,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:04:57,327 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2018-10-26 21:04:57,329 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:04:57,329 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:04:57,333 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:04:57,334 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:04:57,337 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2018-10-26 21:04:57,338 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 21:04:57,369 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:04:57,472 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:04:57,472 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:7 [2018-10-26 21:04:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:04:57,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:04:57,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 42] total 112 [2018-10-26 21:04:57,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-26 21:04:57,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-26 21:04:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=11325, Unknown=0, NotChecked=0, Total=12432 [2018-10-26 21:04:57,733 INFO L87 Difference]: Start difference. First operand 157 states and 164 transitions. Second operand 112 states. [2018-10-26 21:04:59,450 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 101 [2018-10-26 21:05:01,171 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2018-10-26 21:05:01,558 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2018-10-26 21:05:02,456 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2018-10-26 21:05:04,015 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 98 [2018-10-26 21:05:06,982 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2018-10-26 21:05:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:05:10,933 INFO L93 Difference]: Finished difference Result 395 states and 420 transitions. [2018-10-26 21:05:10,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-26 21:05:10,934 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 156 [2018-10-26 21:05:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:05:10,935 INFO L225 Difference]: With dead ends: 395 [2018-10-26 21:05:10,935 INFO L226 Difference]: Without dead ends: 389 [2018-10-26 21:05:10,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 104 SyntacticMatches, 39 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13065 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=4521, Invalid=30261, Unknown=0, NotChecked=0, Total=34782 [2018-10-26 21:05:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2018-10-26 21:05:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 331. [2018-10-26 21:05:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-26 21:05:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 354 transitions. [2018-10-26 21:05:10,966 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 354 transitions. Word has length 156 [2018-10-26 21:05:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:05:10,966 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 354 transitions. [2018-10-26 21:05:10,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-26 21:05:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 354 transitions. [2018-10-26 21:05:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-26 21:05:10,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:05:10,970 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:05:10,970 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:05:10,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:05:10,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1413826714, now seen corresponding path program 6 times [2018-10-26 21:05:10,971 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:05:10,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:05:10,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:10,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:05:10,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:05:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 21:05:11,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:05:11,163 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:05:11,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:05:11,198 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-26 21:05:11,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:05:11,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:05:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 21:05:11,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:05:11,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-26 21:05:11,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 21:05:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 21:05:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-10-26 21:05:11,273 INFO L87 Difference]: Start difference. First operand 331 states and 354 transitions. Second operand 16 states. [2018-10-26 21:05:11,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:05:11,818 INFO L93 Difference]: Finished difference Result 756 states and 806 transitions. [2018-10-26 21:05:11,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 21:05:11,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2018-10-26 21:05:11,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:05:11,820 INFO L225 Difference]: With dead ends: 756 [2018-10-26 21:05:11,820 INFO L226 Difference]: Without dead ends: 525 [2018-10-26 21:05:11,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2018-10-26 21:05:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2018-10-26 21:05:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 451. [2018-10-26 21:05:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-10-26 21:05:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 474 transitions. [2018-10-26 21:05:11,847 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 474 transitions. Word has length 161 [2018-10-26 21:05:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:05:11,847 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 474 transitions. [2018-10-26 21:05:11,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 21:05:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 474 transitions. [2018-10-26 21:05:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-26 21:05:11,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:05:11,849 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:05:11,850 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:05:11,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:05:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash -599283439, now seen corresponding path program 7 times [2018-10-26 21:05:11,850 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:05:11,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:05:11,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:11,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:05:11,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:05:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 65 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-10-26 21:05:12,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:05:12,231 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:05:12,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:05:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:05:12,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:05:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-10-26 21:05:12,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:05:12,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-10-26 21:05:12,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 21:05:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 21:05:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2018-10-26 21:05:12,331 INFO L87 Difference]: Start difference. First operand 451 states and 474 transitions. Second operand 17 states. [2018-10-26 21:05:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:05:14,014 INFO L93 Difference]: Finished difference Result 641 states and 670 transitions. [2018-10-26 21:05:14,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 21:05:14,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-10-26 21:05:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:05:14,016 INFO L225 Difference]: With dead ends: 641 [2018-10-26 21:05:14,016 INFO L226 Difference]: Without dead ends: 221 [2018-10-26 21:05:14,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2018-10-26 21:05:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-26 21:05:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2018-10-26 21:05:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-26 21:05:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 204 transitions. [2018-10-26 21:05:14,030 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 204 transitions. Word has length 171 [2018-10-26 21:05:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:05:14,030 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 204 transitions. [2018-10-26 21:05:14,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 21:05:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 204 transitions. [2018-10-26 21:05:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-26 21:05:14,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:05:14,034 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:05:14,034 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:05:14,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:05:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1429842569, now seen corresponding path program 8 times [2018-10-26 21:05:14,035 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:05:14,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:05:14,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:14,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:05:14,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:05:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:05:21,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:05:21,762 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:05:21,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:05:21,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:05:21,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:05:21,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:05:28,088 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2018-10-26 21:05:28,099 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:05:28,100 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:05:28,101 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:05:28,102 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:05:28,102 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:05:28,103 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:05:28,104 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:05:28,104 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:05:28,115 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 80 [2018-10-26 21:05:28,115 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 21:05:28,130 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:05:28,134 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:05:28,135 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:92, output treesize:7 [2018-10-26 21:05:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:05:28,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:05:28,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 54] total 126 [2018-10-26 21:05:28,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-26 21:05:28,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-26 21:05:28,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=15165, Unknown=0, NotChecked=0, Total=15750 [2018-10-26 21:05:28,522 INFO L87 Difference]: Start difference. First operand 197 states and 204 transitions. Second operand 126 states. [2018-10-26 21:05:31,325 WARN L179 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 150 [2018-10-26 21:05:31,725 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 34 [2018-10-26 21:05:32,085 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 39 [2018-10-26 21:05:32,334 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 38 [2018-10-26 21:05:32,628 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2018-10-26 21:05:32,958 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 37 [2018-10-26 21:05:33,268 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 44 [2018-10-26 21:05:33,517 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 30 [2018-10-26 21:05:33,777 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 39 [2018-10-26 21:05:34,052 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 32 [2018-10-26 21:05:34,293 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 24 [2018-10-26 21:05:34,746 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 47 [2018-10-26 21:05:35,308 WARN L179 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 149 [2018-10-26 21:05:36,087 WARN L179 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 152 [2018-10-26 21:05:36,323 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2018-10-26 21:05:36,567 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 12 [2018-10-26 21:05:36,850 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2018-10-26 21:05:37,073 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2018-10-26 21:05:37,469 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 21 [2018-10-26 21:05:37,712 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 22 [2018-10-26 21:05:38,376 WARN L179 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 148 [2018-10-26 21:05:38,720 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 19 [2018-10-26 21:05:38,998 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 35 [2018-10-26 21:05:39,554 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 28 [2018-10-26 21:05:39,842 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 40 [2018-10-26 21:05:40,110 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 30 [2018-10-26 21:05:40,406 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 26 [2018-10-26 21:05:40,918 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 36 [2018-10-26 21:05:41,169 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 31 [2018-10-26 21:05:41,473 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 32 [2018-10-26 21:05:41,728 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 34 [2018-10-26 21:05:42,506 WARN L179 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 143 [2018-10-26 21:05:43,006 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2018-10-26 21:05:43,360 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2018-10-26 21:05:43,901 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 39 [2018-10-26 21:05:44,756 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 44 [2018-10-26 21:05:45,051 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 40 [2018-10-26 21:05:45,654 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 44 [2018-10-26 21:05:45,979 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 26 [2018-10-26 21:05:46,542 WARN L179 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2018-10-26 21:05:46,825 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 21 [2018-10-26 21:05:47,412 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 27 [2018-10-26 21:05:47,703 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 40 [2018-10-26 21:05:48,203 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 39 [2018-10-26 21:05:48,595 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 34 [2018-10-26 21:05:49,147 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2018-10-26 21:05:49,465 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 39 [2018-10-26 21:05:50,093 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 42 [2018-10-26 21:05:50,398 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 40 [2018-10-26 21:05:51,011 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 44 [2018-10-26 21:05:51,334 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 29 [2018-10-26 21:05:51,822 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2018-10-26 21:05:52,127 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 23 [2018-10-26 21:05:52,730 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 25 [2018-10-26 21:05:53,057 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 42 [2018-10-26 21:05:53,572 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 31 [2018-10-26 21:05:53,938 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 34 [2018-10-26 21:05:54,474 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2018-10-26 21:05:54,809 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 39 [2018-10-26 21:05:55,446 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 42 [2018-10-26 21:05:55,753 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 40 [2018-10-26 21:05:56,291 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 44 [2018-10-26 21:05:56,620 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 43 [2018-10-26 21:05:57,129 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2018-10-26 21:05:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:05:57,510 INFO L93 Difference]: Finished difference Result 520 states and 555 transitions. [2018-10-26 21:05:57,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-26 21:05:57,520 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 196 [2018-10-26 21:05:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:05:57,521 INFO L225 Difference]: With dead ends: 520 [2018-10-26 21:05:57,522 INFO L226 Difference]: Without dead ends: 514 [2018-10-26 21:05:57,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 122 SyntacticMatches, 74 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18487 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=6283, Invalid=48707, Unknown=0, NotChecked=0, Total=54990 [2018-10-26 21:05:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2018-10-26 21:05:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 451. [2018-10-26 21:05:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-10-26 21:05:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 483 transitions. [2018-10-26 21:05:57,554 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 483 transitions. Word has length 196 [2018-10-26 21:05:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:05:57,555 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 483 transitions. [2018-10-26 21:05:57,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-26 21:05:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 483 transitions. [2018-10-26 21:05:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-26 21:05:57,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:05:57,556 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:05:57,557 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:05:57,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:05:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash 879013338, now seen corresponding path program 9 times [2018-10-26 21:05:57,557 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:05:57,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:05:57,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:57,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:05:57,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:05:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:05:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-10-26 21:05:58,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:05:58,971 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:05:58,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:05:59,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 21:05:59,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:05:59,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:05:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-10-26 21:05:59,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:05:59,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-26 21:05:59,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 21:05:59,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 21:05:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2018-10-26 21:05:59,116 INFO L87 Difference]: Start difference. First operand 451 states and 483 transitions. Second operand 19 states. [2018-10-26 21:06:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:06:00,109 INFO L93 Difference]: Finished difference Result 996 states and 1061 transitions. [2018-10-26 21:06:00,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 21:06:00,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2018-10-26 21:06:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:06:00,111 INFO L225 Difference]: With dead ends: 996 [2018-10-26 21:06:00,112 INFO L226 Difference]: Without dead ends: 680 [2018-10-26 21:06:00,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2018-10-26 21:06:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-10-26 21:06:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 596. [2018-10-26 21:06:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2018-10-26 21:06:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 628 transitions. [2018-10-26 21:06:00,157 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 628 transitions. Word has length 201 [2018-10-26 21:06:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:06:00,157 INFO L481 AbstractCegarLoop]: Abstraction has 596 states and 628 transitions. [2018-10-26 21:06:00,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 21:06:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 628 transitions. [2018-10-26 21:06:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-26 21:06:00,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:06:00,159 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:06:00,159 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:06:00,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:06:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash -719780617, now seen corresponding path program 10 times [2018-10-26 21:06:00,160 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:06:00,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:06:00,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:00,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:06:00,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:06:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 109 proven. 55 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2018-10-26 21:06:00,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:06:00,478 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:06:00,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:06:00,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:06:00,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:06:00,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:06:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 126 proven. 38 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2018-10-26 21:06:00,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:06:00,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-26 21:06:00,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 21:06:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 21:06:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2018-10-26 21:06:00,631 INFO L87 Difference]: Start difference. First operand 596 states and 628 transitions. Second operand 19 states. [2018-10-26 21:06:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:06:00,980 INFO L93 Difference]: Finished difference Result 821 states and 859 transitions. [2018-10-26 21:06:00,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 21:06:00,981 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 216 [2018-10-26 21:06:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:06:00,982 INFO L225 Difference]: With dead ends: 821 [2018-10-26 21:06:00,982 INFO L226 Difference]: Without dead ends: 261 [2018-10-26 21:06:00,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2018-10-26 21:06:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-26 21:06:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 237. [2018-10-26 21:06:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-26 21:06:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 244 transitions. [2018-10-26 21:06:01,005 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 244 transitions. Word has length 216 [2018-10-26 21:06:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:06:01,005 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 244 transitions. [2018-10-26 21:06:01,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 21:06:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 244 transitions. [2018-10-26 21:06:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-26 21:06:01,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:06:01,007 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:06:01,007 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:06:01,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:06:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash 451549827, now seen corresponding path program 11 times [2018-10-26 21:06:01,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:06:01,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:06:01,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:01,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:06:01,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:06:02,325 WARN L179 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-10-26 21:06:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:06:12,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:06:12,116 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:06:12,121 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:06:12,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 21:06:12,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:06:12,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:06:18,006 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 84 [2018-10-26 21:06:18,008 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:06:18,009 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,009 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,010 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,012 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,013 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,014 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:06:18,014 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,015 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,015 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:06:18,016 INFO L700 Elim1Store]: detected not equals via solver [2018-10-26 21:06:18,017 INFO L682 Elim1Store]: detected equality via solver [2018-10-26 21:06:18,033 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 123 [2018-10-26 21:06:18,034 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 21:06:18,046 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:06:18,050 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 21:06:18,051 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:120, output treesize:7 [2018-10-26 21:06:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:06:18,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:06:18,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 66] total 166 [2018-10-26 21:06:18,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-26 21:06:18,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-26 21:06:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2965, Invalid=24425, Unknown=0, NotChecked=0, Total=27390 [2018-10-26 21:06:18,491 INFO L87 Difference]: Start difference. First operand 237 states and 244 transitions. Second operand 166 states. [2018-10-26 21:06:21,871 WARN L179 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 160 [2018-10-26 21:06:22,713 WARN L179 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2018-10-26 21:06:25,225 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 29 [2018-10-26 21:06:25,819 WARN L179 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 157 [2018-10-26 21:06:26,123 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2018-10-26 21:06:26,752 WARN L179 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 159 [2018-10-26 21:06:27,114 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2018-10-26 21:06:27,525 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2018-10-26 21:06:28,626 WARN L179 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 148 [2018-10-26 21:06:31,024 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 47 [2018-10-26 21:06:31,367 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 54 [2018-10-26 21:06:31,965 WARN L179 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 153 [2018-10-26 21:06:32,281 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2018-10-26 21:06:32,670 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2018-10-26 21:06:33,074 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 106 [2018-10-26 21:06:34,872 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 51 [2018-10-26 21:06:35,413 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2018-10-26 21:06:37,183 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 53 [2018-10-26 21:06:37,767 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 104 [2018-10-26 21:06:39,551 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 53 [2018-10-26 21:06:40,125 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 105 [2018-10-26 21:06:41,954 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 44 [2018-10-26 21:06:42,505 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 107 [2018-10-26 21:06:45,789 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 49 [2018-10-26 21:06:46,287 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 116 [2018-10-26 21:06:46,536 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2018-10-26 21:06:47,155 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2018-10-26 21:06:47,893 WARN L179 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 162 [2018-10-26 21:06:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:06:48,837 INFO L93 Difference]: Finished difference Result 554 states and 581 transitions. [2018-10-26 21:06:48,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-26 21:06:48,837 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 236 [2018-10-26 21:06:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:06:48,839 INFO L225 Difference]: With dead ends: 554 [2018-10-26 21:06:48,839 INFO L226 Difference]: Without dead ends: 547 [2018-10-26 21:06:48,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 144 SyntacticMatches, 71 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36762 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=10172, Invalid=70200, Unknown=0, NotChecked=0, Total=80372 [2018-10-26 21:06:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2018-10-26 21:06:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 481. [2018-10-26 21:06:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2018-10-26 21:06:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 504 transitions. [2018-10-26 21:06:48,879 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 504 transitions. Word has length 236 [2018-10-26 21:06:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:06:48,879 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 504 transitions. [2018-10-26 21:06:48,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-26 21:06:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 504 transitions. [2018-10-26 21:06:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-26 21:06:48,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:06:48,881 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:06:48,881 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:06:48,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:06:48,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1623125018, now seen corresponding path program 12 times [2018-10-26 21:06:48,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:06:48,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:06:48,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:48,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:06:48,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:06:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 38 proven. 109 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-26 21:06:49,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:06:49,684 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:06:49,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:06:49,741 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 21:06:49,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:06:49,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:06:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 60 proven. 87 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-26 21:06:49,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:06:49,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-10-26 21:06:49,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 21:06:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 21:06:49,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2018-10-26 21:06:49,847 INFO L87 Difference]: Start difference. First operand 481 states and 504 transitions. Second operand 22 states. [2018-10-26 21:06:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:06:50,831 INFO L93 Difference]: Finished difference Result 1091 states and 1142 transitions. [2018-10-26 21:06:50,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 21:06:50,832 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 241 [2018-10-26 21:06:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:06:50,833 INFO L225 Difference]: With dead ends: 1091 [2018-10-26 21:06:50,833 INFO L226 Difference]: Without dead ends: 745 [2018-10-26 21:06:50,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 21:06:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2018-10-26 21:06:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 651. [2018-10-26 21:06:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2018-10-26 21:06:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 674 transitions. [2018-10-26 21:06:50,886 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 674 transitions. Word has length 241 [2018-10-26 21:06:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:06:50,886 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 674 transitions. [2018-10-26 21:06:50,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 21:06:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 674 transitions. [2018-10-26 21:06:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-26 21:06:50,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:06:50,888 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:06:50,890 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:06:50,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:06:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1013519008, now seen corresponding path program 13 times [2018-10-26 21:06:50,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:06:50,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:06:50,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:50,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:06:50,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:06:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 92 proven. 82 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2018-10-26 21:06:51,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:06:51,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 [2018-10-26 21:06:51,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:06:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:06:51,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:06:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 114 proven. 60 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2018-10-26 21:06:51,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:06:51,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-10-26 21:06:51,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 21:06:51,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 21:06:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2018-10-26 21:06:51,473 INFO L87 Difference]: Start difference. First operand 651 states and 674 transitions. Second operand 22 states. [2018-10-26 21:06:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:06:51,894 INFO L93 Difference]: Finished difference Result 911 states and 940 transitions. [2018-10-26 21:06:51,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 21:06:51,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 256 [2018-10-26 21:06:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:06:51,895 INFO L225 Difference]: With dead ends: 911 [2018-10-26 21:06:51,895 INFO L226 Difference]: Without dead ends: 301 [2018-10-26 21:06:51,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2018-10-26 21:06:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-10-26 21:06:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 277. [2018-10-26 21:06:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-10-26 21:06:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 284 transitions. [2018-10-26 21:06:51,913 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 284 transitions. Word has length 256 [2018-10-26 21:06:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:06:51,913 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 284 transitions. [2018-10-26 21:06:51,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 21:06:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 284 transitions. [2018-10-26 21:06:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-26 21:06:51,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:06:51,914 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:06:51,915 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:06:51,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:06:51,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1685537801, now seen corresponding path program 14 times [2018-10-26 21:06:51,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:06:51,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:06:51,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:51,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:06:51,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:06:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:06:52,854 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createLAEquality(EqualityProxy.java:91) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createCCEquality(EqualityProxy.java:112) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.linar.LinArSolve.mbtc(LinArSolve.java:2067) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.linar.LinArSolve.computeConflictClause(LinArSolve.java:618) at de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.DPLLEngine.checkConsistency(DPLLEngine.java:1027) at de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.DPLLEngine.solve(DPLLEngine.java:1171) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol$CheckType$1.check(SMTInterpol.java:114) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.checkSatAssuming(SMTInterpol.java:502) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.checkSat(SMTInterpol.java:455) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:974) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:435) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-10-26 21:06:52,861 INFO L168 Benchmark]: Toolchain (without parser) took 149356.00 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 423.6 MB). Free memory was 954.4 MB in the beginning and 1.4 GB in the end (delta: -422.6 MB). Peak memory consumption was 537.5 MB. Max. memory is 11.5 GB. [2018-10-26 21:06:52,862 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:06:52,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.01 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:06:52,862 INFO L168 Benchmark]: Boogie Preprocessor took 34.41 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:06:52,863 INFO L168 Benchmark]: RCFGBuilder took 668.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -173.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2018-10-26 21:06:52,863 INFO L168 Benchmark]: TraceAbstraction took 148459.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 282.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -262.9 MB). Peak memory consumption was 555.6 MB. Max. memory is 11.5 GB. [2018-10-26 21:06:52,877 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 190.01 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 34.41 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 668.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -173.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 148459.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 282.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -262.9 MB). Peak memory consumption was 555.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createLAEquality(EqualityProxy.java:91) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:06:54,689 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:06:54,690 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:06:54,699 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:06:54,699 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:06:54,700 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:06:54,701 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:06:54,702 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:06:54,703 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:06:54,704 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:06:54,705 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:06:54,705 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:06:54,706 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:06:54,706 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:06:54,707 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:06:54,708 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:06:54,708 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:06:54,710 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:06:54,711 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:06:54,712 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:06:54,713 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:06:54,714 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:06:54,715 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:06:54,716 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:06:54,716 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:06:54,716 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:06:54,717 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:06:54,718 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:06:54,718 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:06:54,719 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:06:54,719 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:06:54,720 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:06:54,720 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:06:54,720 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:06:54,725 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:06:54,725 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:06:54,726 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-10-26 21:06:54,736 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:06:54,737 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:06:54,737 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:06:54,737 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:06:54,738 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:06:54,738 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:06:54,738 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:06:54,738 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:06:54,738 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 21:06:54,739 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:06:54,740 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:06:54,740 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:06:54,740 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:06:54,740 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:06:54,740 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:06:54,742 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:06:54,742 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:06:54,743 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:06:54,743 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:06:54,743 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:06:54,743 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-10-26 21:06:54,743 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:06:54,743 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 21:06:54,743 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 21:06:54,743 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_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/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 -> 311ef440fcf709cae5d6f2d3b14d0a45913d759b [2018-10-26 21:06:54,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:06:54,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:06:54,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:06:54,792 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:06:54,792 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:06:54,793 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/../../sv-benchmarks/c/array-crafted/zero_sum4_true-unreach-call.c [2018-10-26 21:06:54,839 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/0b4b9e4cc/9424a2851b5d4d75bb27a5c656fb394f/FLAG738eaff3c [2018-10-26 21:06:55,231 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:06:55,234 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/sv-benchmarks/c/array-crafted/zero_sum4_true-unreach-call.c [2018-10-26 21:06:55,239 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/0b4b9e4cc/9424a2851b5d4d75bb27a5c656fb394f/FLAG738eaff3c [2018-10-26 21:06:55,258 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b9aa8b42-827f-41b1-bbf0-93f63700bcc1/bin-2019/uautomizer/data/0b4b9e4cc/9424a2851b5d4d75bb27a5c656fb394f [2018-10-26 21:06:55,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:06:55,262 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:06:55,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:06:55,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:06:55,266 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:06:55,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:06:55" (1/1) ... [2018-10-26 21:06:55,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ce52cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:06:55, skipping insertion in model container [2018-10-26 21:06:55,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:06:55" (1/1) ... [2018-10-26 21:06:55,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:06:55,298 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:06:55,465 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:06:55,471 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:06:55,486 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: 1 at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValueBitvector(TypeSizes.java:465) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:340) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:335) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.extractSizeTValue(TypeSizeAndOffsetComputer.java:317) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.constructSizeTValue_Array(TypeSizeAndOffsetComputer.java:229) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.computeSize(TypeSizeAndOffsetComputer.java:200) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.constructBytesizeExpression(TypeSizeAndOffsetComputer.java:120) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.MemoryHandler.calculateSizeOf(MemoryHandler.java:276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.MemoryHandler.getMallocCall(MemoryHandler.java:514) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleIASTDeclarator(CHandler.java:2686) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1876) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:279) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1011) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:318) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:332) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1519) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:330) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:332) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:364) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:287) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3316) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2119) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:537) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:268) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.performMainRun(MainTranslator.java:228) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:191) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:117) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:129) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-10-26 21:06:55,495 INFO L168 Benchmark]: Toolchain (without parser) took 234.16 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:06:55,497 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:06:55,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.19 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:06:55,499 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 232.19 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: 1 de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: ArrayIndexOutOfBoundsException: 1: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValueBitvector(TypeSizes.java:465) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...