./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_false-unreach-call_true-no-overflow_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_false-unreach-call_true-no-overflow_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_false-unreach-call_true-no-overflow_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:52:56,510 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:52:56,511 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:52:56,519 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:52:56,520 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:52:56,520 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:52:56,521 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:52:56,522 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:52:56,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:52:56,524 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:52:56,524 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:52:56,525 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:52:56,525 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:52:56,526 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:52:56,527 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:52:56,527 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:52:56,528 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:52:56,529 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:52:56,530 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:52:56,531 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:52:56,532 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:52:56,533 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:52:56,534 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:52:56,534 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:52:56,535 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:52:56,535 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:52:56,536 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:52:56,536 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:52:56,537 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:52:56,538 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:52:56,538 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:52:56,538 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:52:56,538 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:52:56,539 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:52:56,539 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:52:56,540 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:52:56,540 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:52:56,550 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:52:56,550 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:52:56,550 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:52:56,551 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:52:56,551 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:52:56,551 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:52:56,551 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:52:56,552 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:52:56,552 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:52:56,552 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:52:56,552 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:52:56,552 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:52:56,552 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:52:56,552 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:52:56,552 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:52:56,553 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:52:56,553 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:52:56,553 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:52:56,553 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:52:56,553 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:52:56,553 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:52:56,553 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:52:56,554 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:52:56,554 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:52:56,554 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:52:56,554 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:52:56,554 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:52:56,554 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:52:56,554 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:52:56,555 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:52:56,555 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_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2018-11-28 12:52:56,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:52:56,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:52:56,585 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:52:56,586 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:52:56,586 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:52:56,587 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/byte_add_false-unreach-call_true-no-overflow_true-termination.i [2018-11-28 12:52:56,623 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/67a0a6091/e4e4aa4dd63e4804b6073148b2ea1b3f/FLAGef50b5986 [2018-11-28 12:52:56,955 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:52:56,955 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/sv-benchmarks/c/bitvector/byte_add_false-unreach-call_true-no-overflow_true-termination.i [2018-11-28 12:52:56,959 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/67a0a6091/e4e4aa4dd63e4804b6073148b2ea1b3f/FLAGef50b5986 [2018-11-28 12:52:57,383 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/67a0a6091/e4e4aa4dd63e4804b6073148b2ea1b3f [2018-11-28 12:52:57,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:52:57,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:52:57,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:52:57,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:52:57,388 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:52:57,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5d50a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57, skipping insertion in model container [2018-11-28 12:52:57,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:52:57,407 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:52:57,522 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:52:57,524 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:52:57,545 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:52:57,554 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:52:57,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57 WrapperNode [2018-11-28 12:52:57,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:52:57,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:52:57,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:52:57,555 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:52:57,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:52:57,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:52:57,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:52:57,568 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:52:57,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... [2018-11-28 12:52:57,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:52:57,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:52:57,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:52:57,623 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:52:57,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 [2018-11-28 12:52:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure mp_add [2018-11-28 12:52:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure mp_add [2018-11-28 12:52:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:52:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:52:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:52:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:52:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:52:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:52:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 12:52:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 12:52:57,837 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:52:57,837 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-28 12:52:57,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:52:57 BoogieIcfgContainer [2018-11-28 12:52:57,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:52:57,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:52:57,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:52:57,840 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:52:57,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:52:57" (1/3) ... [2018-11-28 12:52:57,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46073206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:52:57, skipping insertion in model container [2018-11-28 12:52:57,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:52:57" (2/3) ... [2018-11-28 12:52:57,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46073206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:52:57, skipping insertion in model container [2018-11-28 12:52:57,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:52:57" (3/3) ... [2018-11-28 12:52:57,841 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_false-unreach-call_true-no-overflow_true-termination.i [2018-11-28 12:52:57,847 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:52:57,851 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:52:57,860 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:52:57,878 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:52:57,879 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:52:57,879 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:52:57,879 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:52:57,879 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:52:57,879 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:52:57,879 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:52:57,879 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:52:57,879 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:52:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-11-28 12:52:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-28 12:52:57,894 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:52:57,894 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:52:57,896 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:52:57,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:52:57,899 INFO L82 PathProgramCache]: Analyzing trace with hash 397916932, now seen corresponding path program 1 times [2018-11-28 12:52:57,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:52:57,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:52:57,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:57,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:57,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:52:57,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:52:57,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 12:52:57,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 12:52:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 12:52:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 12:52:57,999 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-11-28 12:52:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:52:58,012 INFO L93 Difference]: Finished difference Result 76 states and 112 transitions. [2018-11-28 12:52:58,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 12:52:58,013 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-11-28 12:52:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:52:58,019 INFO L225 Difference]: With dead ends: 76 [2018-11-28 12:52:58,019 INFO L226 Difference]: Without dead ends: 47 [2018-11-28 12:52:58,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 12:52:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-28 12:52:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-28 12:52:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-28 12:52:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 73 transitions. [2018-11-28 12:52:58,047 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 73 transitions. Word has length 21 [2018-11-28 12:52:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:52:58,047 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 73 transitions. [2018-11-28 12:52:58,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 12:52:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 73 transitions. [2018-11-28 12:52:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-28 12:52:58,048 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:52:58,048 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:52:58,049 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:52:58,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:52:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1531564698, now seen corresponding path program 1 times [2018-11-28 12:52:58,049 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:52:58,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:52:58,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:58,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:52:58,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:52:58,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 12:52:58,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 12:52:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 12:52:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:52:58,141 INFO L87 Difference]: Start difference. First operand 47 states and 73 transitions. Second operand 3 states. [2018-11-28 12:52:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:52:58,268 INFO L93 Difference]: Finished difference Result 102 states and 169 transitions. [2018-11-28 12:52:58,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 12:52:58,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2018-11-28 12:52:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:52:58,270 INFO L225 Difference]: With dead ends: 102 [2018-11-28 12:52:58,270 INFO L226 Difference]: Without dead ends: 70 [2018-11-28 12:52:58,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:52:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-28 12:52:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2018-11-28 12:52:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-28 12:52:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 98 transitions. [2018-11-28 12:52:58,278 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 98 transitions. Word has length 21 [2018-11-28 12:52:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:52:58,278 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 98 transitions. [2018-11-28 12:52:58,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 12:52:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 98 transitions. [2018-11-28 12:52:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 12:52:58,279 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:52:58,279 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:52:58,279 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:52:58,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:52:58,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1473767205, now seen corresponding path program 1 times [2018-11-28 12:52:58,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:52:58,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:52:58,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:58,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:52:58,358 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:52:58,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:52:58,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 12:52:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 12:52:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:52:58,359 INFO L87 Difference]: Start difference. First operand 68 states and 98 transitions. Second operand 4 states. [2018-11-28 12:52:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:52:58,550 INFO L93 Difference]: Finished difference Result 159 states and 262 transitions. [2018-11-28 12:52:58,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:52:58,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-11-28 12:52:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:52:58,552 INFO L225 Difference]: With dead ends: 159 [2018-11-28 12:52:58,552 INFO L226 Difference]: Without dead ends: 127 [2018-11-28 12:52:58,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:52:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-28 12:52:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2018-11-28 12:52:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-28 12:52:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 133 transitions. [2018-11-28 12:52:58,560 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 133 transitions. Word has length 27 [2018-11-28 12:52:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:52:58,560 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 133 transitions. [2018-11-28 12:52:58,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 12:52:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 133 transitions. [2018-11-28 12:52:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 12:52:58,561 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:52:58,561 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:52:58,562 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:52:58,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:52:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash -13869364, now seen corresponding path program 1 times [2018-11-28 12:52:58,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:52:58,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:52:58,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:58,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 12:52:58,625 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:52:58,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:52:58,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 12:52:58,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 12:52:58,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:52:58,626 INFO L87 Difference]: Start difference. First operand 91 states and 133 transitions. Second operand 4 states. [2018-11-28 12:52:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:52:58,798 INFO L93 Difference]: Finished difference Result 245 states and 378 transitions. [2018-11-28 12:52:58,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:52:58,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-11-28 12:52:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:52:58,800 INFO L225 Difference]: With dead ends: 245 [2018-11-28 12:52:58,800 INFO L226 Difference]: Without dead ends: 174 [2018-11-28 12:52:58,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:52:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-11-28 12:52:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2018-11-28 12:52:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-28 12:52:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 188 transitions. [2018-11-28 12:52:58,808 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 188 transitions. Word has length 33 [2018-11-28 12:52:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:52:58,809 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 188 transitions. [2018-11-28 12:52:58,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 12:52:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 188 transitions. [2018-11-28 12:52:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 12:52:58,810 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:52:58,810 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:52:58,810 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:52:58,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:52:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1417056703, now seen corresponding path program 1 times [2018-11-28 12:52:58,810 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:52:58,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:52:58,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:58,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-28 12:52:58,877 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:52:58,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:52:58,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:52:58,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:52:58,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:52:58,878 INFO L87 Difference]: Start difference. First operand 124 states and 188 transitions. Second operand 5 states. [2018-11-28 12:52:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:52:59,057 INFO L93 Difference]: Finished difference Result 346 states and 527 transitions. [2018-11-28 12:52:59,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 12:52:59,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2018-11-28 12:52:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:52:59,060 INFO L225 Difference]: With dead ends: 346 [2018-11-28 12:52:59,060 INFO L226 Difference]: Without dead ends: 240 [2018-11-28 12:52:59,061 INFO L631 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 [2018-11-28 12:52:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-11-28 12:52:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 132. [2018-11-28 12:52:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-28 12:52:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 197 transitions. [2018-11-28 12:52:59,072 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 197 transitions. Word has length 39 [2018-11-28 12:52:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:52:59,073 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 197 transitions. [2018-11-28 12:52:59,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:52:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 197 transitions. [2018-11-28 12:52:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 12:52:59,074 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:52:59,074 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:52:59,075 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:52:59,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:52:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1068918534, now seen corresponding path program 1 times [2018-11-28 12:52:59,075 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:52:59,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:52:59,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:59,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:59,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-28 12:52:59,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:52:59,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:52:59,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:52:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:52:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:52:59,145 INFO L87 Difference]: Start difference. First operand 132 states and 197 transitions. Second operand 5 states. [2018-11-28 12:52:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:52:59,313 INFO L93 Difference]: Finished difference Result 367 states and 553 transitions. [2018-11-28 12:52:59,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 12:52:59,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2018-11-28 12:52:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:52:59,314 INFO L225 Difference]: With dead ends: 367 [2018-11-28 12:52:59,314 INFO L226 Difference]: Without dead ends: 260 [2018-11-28 12:52:59,315 INFO L631 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 [2018-11-28 12:52:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-11-28 12:52:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 142. [2018-11-28 12:52:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-11-28 12:52:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 210 transitions. [2018-11-28 12:52:59,326 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 210 transitions. Word has length 40 [2018-11-28 12:52:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:52:59,326 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 210 transitions. [2018-11-28 12:52:59,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:52:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 210 transitions. [2018-11-28 12:52:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 12:52:59,327 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:52:59,328 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:52:59,328 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:52:59,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:52:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash 482670800, now seen corresponding path program 1 times [2018-11-28 12:52:59,328 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:52:59,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:52:59,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:59,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:59,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:52:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 12:52:59,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:52:59,398 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 [2018-11-28 12:52:59,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:52:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:52:59,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:52:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 12:52:59,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:52:59,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-11-28 12:52:59,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 12:52:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 12:52:59,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:52:59,499 INFO L87 Difference]: Start difference. First operand 142 states and 210 transitions. Second operand 7 states. [2018-11-28 12:53:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:00,228 INFO L93 Difference]: Finished difference Result 335 states and 526 transitions. [2018-11-28 12:53:00,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 12:53:00,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-11-28 12:53:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:00,229 INFO L225 Difference]: With dead ends: 335 [2018-11-28 12:53:00,229 INFO L226 Difference]: Without dead ends: 227 [2018-11-28 12:53:00,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:53:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-11-28 12:53:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 184. [2018-11-28 12:53:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-28 12:53:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 244 transitions. [2018-11-28 12:53:00,238 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 244 transitions. Word has length 41 [2018-11-28 12:53:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:00,238 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 244 transitions. [2018-11-28 12:53:00,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 12:53:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 244 transitions. [2018-11-28 12:53:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-28 12:53:00,239 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:00,239 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 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] [2018-11-28 12:53:00,240 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:00,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:00,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1878612609, now seen corresponding path program 1 times [2018-11-28 12:53:00,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:00,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:00,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:00,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:00,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-28 12:53:00,307 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:00,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:53:00,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:53:00,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:53:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:53:00,308 INFO L87 Difference]: Start difference. First operand 184 states and 244 transitions. Second operand 6 states. [2018-11-28 12:53:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:00,570 INFO L93 Difference]: Finished difference Result 641 states and 855 transitions. [2018-11-28 12:53:00,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:53:00,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2018-11-28 12:53:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:00,572 INFO L225 Difference]: With dead ends: 641 [2018-11-28 12:53:00,572 INFO L226 Difference]: Without dead ends: 492 [2018-11-28 12:53:00,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:53:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2018-11-28 12:53:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 184. [2018-11-28 12:53:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-28 12:53:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 244 transitions. [2018-11-28 12:53:00,583 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 244 transitions. Word has length 47 [2018-11-28 12:53:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:00,583 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 244 transitions. [2018-11-28 12:53:00,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:53:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 244 transitions. [2018-11-28 12:53:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-28 12:53:00,585 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:00,585 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 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] [2018-11-28 12:53:00,585 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:00,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1498452256, now seen corresponding path program 1 times [2018-11-28 12:53:00,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:00,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:00,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:00,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:00,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-28 12:53:00,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:00,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:53:00,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:53:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:53:00,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:53:00,650 INFO L87 Difference]: Start difference. First operand 184 states and 244 transitions. Second operand 6 states. [2018-11-28 12:53:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:00,917 INFO L93 Difference]: Finished difference Result 625 states and 835 transitions. [2018-11-28 12:53:00,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:53:00,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2018-11-28 12:53:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:00,922 INFO L225 Difference]: With dead ends: 625 [2018-11-28 12:53:00,922 INFO L226 Difference]: Without dead ends: 477 [2018-11-28 12:53:00,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:53:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2018-11-28 12:53:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 396. [2018-11-28 12:53:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-28 12:53:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 540 transitions. [2018-11-28 12:53:00,937 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 540 transitions. Word has length 48 [2018-11-28 12:53:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:00,938 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 540 transitions. [2018-11-28 12:53:00,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:53:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 540 transitions. [2018-11-28 12:53:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 12:53:00,939 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:00,939 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 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, 1] [2018-11-28 12:53:00,939 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:00,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash -211268504, now seen corresponding path program 1 times [2018-11-28 12:53:00,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:00,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:00,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:00,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:00,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-28 12:53:01,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:01,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-28 12:53:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:53:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:53:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:53:01,029 INFO L87 Difference]: Start difference. First operand 396 states and 540 transitions. Second operand 8 states. [2018-11-28 12:53:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:01,755 INFO L93 Difference]: Finished difference Result 2003 states and 2787 transitions. [2018-11-28 12:53:01,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:53:01,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2018-11-28 12:53:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:01,760 INFO L225 Difference]: With dead ends: 2003 [2018-11-28 12:53:01,760 INFO L226 Difference]: Without dead ends: 1601 [2018-11-28 12:53:01,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:53:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2018-11-28 12:53:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1231. [2018-11-28 12:53:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2018-11-28 12:53:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1711 transitions. [2018-11-28 12:53:01,807 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1711 transitions. Word has length 49 [2018-11-28 12:53:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:01,807 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 1711 transitions. [2018-11-28 12:53:01,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:53:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1711 transitions. [2018-11-28 12:53:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-28 12:53:01,809 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:01,809 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:01,809 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:01,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:01,810 INFO L82 PathProgramCache]: Analyzing trace with hash 968985203, now seen corresponding path program 1 times [2018-11-28 12:53:01,810 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:01,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:01,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:01,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:01,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 12:53:01,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:01,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:53:01,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 12:53:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 12:53:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:53:01,858 INFO L87 Difference]: Start difference. First operand 1231 states and 1711 transitions. Second operand 4 states. [2018-11-28 12:53:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:01,993 INFO L93 Difference]: Finished difference Result 1698 states and 2357 transitions. [2018-11-28 12:53:01,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:53:01,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-11-28 12:53:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:01,997 INFO L225 Difference]: With dead ends: 1698 [2018-11-28 12:53:01,997 INFO L226 Difference]: Without dead ends: 1249 [2018-11-28 12:53:01,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:53:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2018-11-28 12:53:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1243. [2018-11-28 12:53:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2018-11-28 12:53:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1692 transitions. [2018-11-28 12:53:02,047 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1692 transitions. Word has length 54 [2018-11-28 12:53:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:02,048 INFO L480 AbstractCegarLoop]: Abstraction has 1243 states and 1692 transitions. [2018-11-28 12:53:02,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 12:53:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1692 transitions. [2018-11-28 12:53:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 12:53:02,050 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:02,050 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:02,051 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:02,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash 752188361, now seen corresponding path program 1 times [2018-11-28 12:53:02,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:02,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:02,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:02,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:02,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 12:53:02,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:53:02,194 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 [2018-11-28 12:53:02,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:02,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 12:53:02,313 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:53:02,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2018-11-28 12:53:02,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:53:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:53:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:53:02,314 INFO L87 Difference]: Start difference. First operand 1243 states and 1692 transitions. Second operand 10 states. [2018-11-28 12:53:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:02,929 INFO L93 Difference]: Finished difference Result 2808 states and 3815 transitions. [2018-11-28 12:53:02,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:53:02,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2018-11-28 12:53:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:02,932 INFO L225 Difference]: With dead ends: 2808 [2018-11-28 12:53:02,932 INFO L226 Difference]: Without dead ends: 1553 [2018-11-28 12:53:02,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:53:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2018-11-28 12:53:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1279. [2018-11-28 12:53:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2018-11-28 12:53:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1694 transitions. [2018-11-28 12:53:02,959 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1694 transitions. Word has length 55 [2018-11-28 12:53:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:02,960 INFO L480 AbstractCegarLoop]: Abstraction has 1279 states and 1694 transitions. [2018-11-28 12:53:02,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:53:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1694 transitions. [2018-11-28 12:53:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-28 12:53:02,961 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:02,961 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:02,961 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:02,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1415790296, now seen corresponding path program 1 times [2018-11-28 12:53:02,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:02,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:02,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:02,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:02,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 12:53:03,045 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:03,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-28 12:53:03,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:53:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:53:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:53:03,046 INFO L87 Difference]: Start difference. First operand 1279 states and 1694 transitions. Second operand 9 states. [2018-11-28 12:53:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:03,564 INFO L93 Difference]: Finished difference Result 2987 states and 3987 transitions. [2018-11-28 12:53:03,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:53:03,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2018-11-28 12:53:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:03,567 INFO L225 Difference]: With dead ends: 2987 [2018-11-28 12:53:03,567 INFO L226 Difference]: Without dead ends: 1932 [2018-11-28 12:53:03,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:53:03,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2018-11-28 12:53:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1643. [2018-11-28 12:53:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2018-11-28 12:53:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2152 transitions. [2018-11-28 12:53:03,598 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2152 transitions. Word has length 56 [2018-11-28 12:53:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:03,599 INFO L480 AbstractCegarLoop]: Abstraction has 1643 states and 2152 transitions. [2018-11-28 12:53:03,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:53:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2152 transitions. [2018-11-28 12:53:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-28 12:53:03,600 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:03,600 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:03,600 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:03,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:03,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1038259591, now seen corresponding path program 1 times [2018-11-28 12:53:03,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:03,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:03,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:03,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:03,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 12:53:03,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:03,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:53:03,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 12:53:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 12:53:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:53:03,642 INFO L87 Difference]: Start difference. First operand 1643 states and 2152 transitions. Second operand 4 states. [2018-11-28 12:53:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:03,749 INFO L93 Difference]: Finished difference Result 2184 states and 2863 transitions. [2018-11-28 12:53:03,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:53:03,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2018-11-28 12:53:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:03,754 INFO L225 Difference]: With dead ends: 2184 [2018-11-28 12:53:03,754 INFO L226 Difference]: Without dead ends: 1678 [2018-11-28 12:53:03,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:53:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2018-11-28 12:53:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1644. [2018-11-28 12:53:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2018-11-28 12:53:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2133 transitions. [2018-11-28 12:53:03,798 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2133 transitions. Word has length 58 [2018-11-28 12:53:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:03,798 INFO L480 AbstractCegarLoop]: Abstraction has 1644 states and 2133 transitions. [2018-11-28 12:53:03,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 12:53:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2133 transitions. [2018-11-28 12:53:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-28 12:53:03,800 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:03,800 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-11-28 12:53:03,800 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:03,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1793263524, now seen corresponding path program 1 times [2018-11-28 12:53:03,800 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:03,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:03,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:03,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:03,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 12:53:03,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:53:03,876 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 [2018-11-28 12:53:03,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:03,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 12:53:04,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:53:04,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2018-11-28 12:53:04,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:53:04,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:53:04,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:53:04,003 INFO L87 Difference]: Start difference. First operand 1644 states and 2133 transitions. Second operand 10 states. [2018-11-28 12:53:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:04,639 INFO L93 Difference]: Finished difference Result 2532 states and 3267 transitions. [2018-11-28 12:53:04,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 12:53:04,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2018-11-28 12:53:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:04,642 INFO L225 Difference]: With dead ends: 2532 [2018-11-28 12:53:04,642 INFO L226 Difference]: Without dead ends: 1883 [2018-11-28 12:53:04,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:53:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2018-11-28 12:53:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1651. [2018-11-28 12:53:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1651 states. [2018-11-28 12:53:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2121 transitions. [2018-11-28 12:53:04,669 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2121 transitions. Word has length 59 [2018-11-28 12:53:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:04,669 INFO L480 AbstractCegarLoop]: Abstraction has 1651 states and 2121 transitions. [2018-11-28 12:53:04,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:53:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2121 transitions. [2018-11-28 12:53:04,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-28 12:53:04,671 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:04,671 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-11-28 12:53:04,671 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:04,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash -313662180, now seen corresponding path program 1 times [2018-11-28 12:53:04,671 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:53:04,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:53:04,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:04,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:04,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:53:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:53:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:53:04,702 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 12:53:04,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:53:04 BoogieIcfgContainer [2018-11-28 12:53:04,745 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:53:04,746 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:53:04,746 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:53:04,746 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:53:04,746 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:52:57" (3/4) ... [2018-11-28 12:53:04,749 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 12:53:04,749 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:53:04,749 INFO L168 Benchmark]: Toolchain (without parser) took 7364.19 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 314.0 MB). Free memory was 957.6 MB in the beginning and 1.2 GB in the end (delta: -210.0 MB). Peak memory consumption was 104.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:53:04,750 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:53:04,750 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.13 ms. Allocated memory is still 1.0 GB. Free memory was 957.6 MB in the beginning and 944.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2018-11-28 12:53:04,751 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.32 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:53:04,751 INFO L168 Benchmark]: Boogie Preprocessor took 54.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2018-11-28 12:53:04,751 INFO L168 Benchmark]: RCFGBuilder took 214.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:53:04,752 INFO L168 Benchmark]: TraceAbstraction took 6907.77 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 193.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.7 MB). Peak memory consumption was 117.8 MB. Max. memory is 11.5 GB. [2018-11-28 12:53:04,752 INFO L168 Benchmark]: Witness Printer took 3.05 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:53:04,754 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.13 ms. Allocated memory is still 1.0 GB. Free memory was 957.6 MB in the beginning and 944.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.32 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 54.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 214.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6907.77 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 193.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.7 MB). Peak memory consumption was 117.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.05 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 97. Possible FailurePath: [L105] unsigned int a, b, r; [L107] a = __VERIFIER_nondet_uint() [L108] b = __VERIFIER_nondet_uint() [L110] CALL, EXPR mp_add(a, b) VAL [\old(a)=0, \old(b)=0] [L23] unsigned char a0, a1, a2, a3; [L24] unsigned char b0, b1, b2, b3; [L25] unsigned char r0, r1, r2, r3; [L26] unsigned short carry; [L27] unsigned short partial_sum; [L28] unsigned int r; [L29] unsigned char i; [L30] unsigned char na, nb; [L31] a0 = a [L32] a1 = a >> 8 [L33] a2 = a >> 16U [L34] a3 = a >> 24U [L35] b0 = b [L36] b1 = b >> 8U [L37] b2 = b >> 16U [L38] b3 = b >> 24U [L39] na = (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=4] [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=3] [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=2] [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1] [L49] nb = (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=4] [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=3] [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=2] [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=1] [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L64] COND TRUE i < na VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L66] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L67] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L68] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L70] COND TRUE i < nb VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L72] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L73] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L74] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L76] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L81] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L82] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L83] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L85] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L88] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L89] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L90] COND TRUE i == (unsigned char)1 [L90] r1 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L91] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L92] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L94] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L88] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L89] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L90] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L92] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L94] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L88] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L89] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L90] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L91] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L94] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L88] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; VAL [\old(a)=0, \old(b)=0, \result=1, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r=1, r0=0, r1=0, r2=0, r3=0] [L110] RET, EXPR mp_add(a, b) VAL [a=0, b=0, mp_add(a, b)=1] [L110] r = mp_add(a, b) [L112] CALL __VERIFIER_assert(r == a + b) VAL [\old(cond)=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. UNSAFE Result, 6.8s OverallTime, 16 OverallIterations, 4 TraceHistogramMax, 4.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1244 SDtfs, 2646 SDslu, 2753 SDs, 0 SdLazy, 5130 SolverSat, 502 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 176 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1651occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 1951 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 863 NumberOfCodeBlocks, 863 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 785 ConstructedInterpolants, 41 QuantifiedInterpolants, 159396 SizeOfPredicates, 7 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 361/367 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:53:06,178 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:53:06,180 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:53:06,187 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:53:06,187 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:53:06,188 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:53:06,189 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:53:06,190 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:53:06,191 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:53:06,191 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:53:06,192 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:53:06,192 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:53:06,193 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:53:06,193 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:53:06,194 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:53:06,194 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:53:06,195 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:53:06,196 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:53:06,197 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:53:06,197 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:53:06,198 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:53:06,198 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:53:06,199 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:53:06,200 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:53:06,200 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:53:06,200 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:53:06,201 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:53:06,201 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:53:06,202 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:53:06,203 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:53:06,203 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:53:06,203 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:53:06,203 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:53:06,204 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:53:06,204 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:53:06,205 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:53:06,205 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-28 12:53:06,216 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:53:06,216 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:53:06,217 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:53:06,217 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:53:06,217 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:53:06,217 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:53:06,218 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:53:06,218 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:53:06,218 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:53:06,218 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:53:06,218 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:53:06,218 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:53:06,218 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:53:06,218 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:53:06,219 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-28 12:53:06,219 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-28 12:53:06,219 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:53:06,219 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:53:06,219 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:53:06,219 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:53:06,219 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:53:06,220 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:53:06,220 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:53:06,220 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:53:06,220 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:53:06,220 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:53:06,220 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:53:06,220 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:53:06,220 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-28 12:53:06,222 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:53:06,222 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-11-28 12:53:06,222 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-28 12:53:06,222 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_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2018-11-28 12:53:06,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:53:06,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:53:06,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:53:06,259 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:53:06,259 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:53:06,259 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/byte_add_false-unreach-call_true-no-overflow_true-termination.i [2018-11-28 12:53:06,297 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/81852e94a/03353742bb2d4f43a13d6a8dc24bd55b/FLAG781acadc0 [2018-11-28 12:53:06,691 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:53:06,691 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/sv-benchmarks/c/bitvector/byte_add_false-unreach-call_true-no-overflow_true-termination.i [2018-11-28 12:53:06,696 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/81852e94a/03353742bb2d4f43a13d6a8dc24bd55b/FLAG781acadc0 [2018-11-28 12:53:06,704 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/data/81852e94a/03353742bb2d4f43a13d6a8dc24bd55b [2018-11-28 12:53:06,706 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:53:06,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:53:06,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:53:06,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:53:06,710 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:53:06,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8251e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06, skipping insertion in model container [2018-11-28 12:53:06,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:53:06,733 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:53:06,863 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:53:06,866 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:53:06,895 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:53:06,906 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:53:06,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06 WrapperNode [2018-11-28 12:53:06,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:53:06,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:53:06,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:53:06,907 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:53:06,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:53:06,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:53:06,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:53:06,924 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:53:06,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... [2018-11-28 12:53:06,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:53:06,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:53:06,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:53:06,996 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:53:06,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/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 [2018-11-28 12:53:07,034 INFO L130 BoogieDeclarations]: Found specification of procedure mp_add [2018-11-28 12:53:07,034 INFO L138 BoogieDeclarations]: Found implementation of procedure mp_add [2018-11-28 12:53:07,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:53:07,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:53:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:53:07,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:53:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:53:07,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:53:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 12:53:07,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 12:53:07,229 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:53:07,229 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-28 12:53:07,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:53:07 BoogieIcfgContainer [2018-11-28 12:53:07,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:53:07,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:53:07,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:53:07,233 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:53:07,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:53:06" (1/3) ... [2018-11-28 12:53:07,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff427fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:53:07, skipping insertion in model container [2018-11-28 12:53:07,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:53:06" (2/3) ... [2018-11-28 12:53:07,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff427fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:53:07, skipping insertion in model container [2018-11-28 12:53:07,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:53:07" (3/3) ... [2018-11-28 12:53:07,236 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_false-unreach-call_true-no-overflow_true-termination.i [2018-11-28 12:53:07,243 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:53:07,247 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:53:07,256 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:53:07,274 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:53:07,274 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:53:07,274 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:53:07,274 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:53:07,274 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:53:07,275 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:53:07,275 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:53:07,275 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:53:07,275 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:53:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-11-28 12:53:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-28 12:53:07,288 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:07,289 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:07,290 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:07,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash 397916932, now seen corresponding path program 1 times [2018-11-28 12:53:07,296 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:07,296 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:07,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:07,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:07,361 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [MP cvc4 --incremental --print-success --lang smt --rewrite-divk (2)] Exception during sending of exit command (exit): Broken pipe [2018-11-28 12:53:07,366 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:07,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 12:53:07,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 12:53:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 12:53:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 12:53:07,379 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-11-28 12:53:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:07,395 INFO L93 Difference]: Finished difference Result 76 states and 112 transitions. [2018-11-28 12:53:07,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 12:53:07,395 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-11-28 12:53:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:07,402 INFO L225 Difference]: With dead ends: 76 [2018-11-28 12:53:07,402 INFO L226 Difference]: Without dead ends: 47 [2018-11-28 12:53:07,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 12:53:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-28 12:53:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-28 12:53:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-28 12:53:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 73 transitions. [2018-11-28 12:53:07,428 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 73 transitions. Word has length 21 [2018-11-28 12:53:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:07,428 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 73 transitions. [2018-11-28 12:53:07,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 12:53:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 73 transitions. [2018-11-28 12:53:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-28 12:53:07,429 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:07,429 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:07,430 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:07,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1531564698, now seen corresponding path program 1 times [2018-11-28 12:53:07,430 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:07,430 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:07,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:07,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:07,525 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:07,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:07,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:53:07,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 12:53:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 12:53:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:53:07,529 INFO L87 Difference]: Start difference. First operand 47 states and 73 transitions. Second operand 4 states. [2018-11-28 12:53:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:07,650 INFO L93 Difference]: Finished difference Result 127 states and 213 transitions. [2018-11-28 12:53:07,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 12:53:07,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-11-28 12:53:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:07,653 INFO L225 Difference]: With dead ends: 127 [2018-11-28 12:53:07,653 INFO L226 Difference]: Without dead ends: 95 [2018-11-28 12:53:07,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:53:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-28 12:53:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2018-11-28 12:53:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-28 12:53:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 139 transitions. [2018-11-28 12:53:07,662 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 139 transitions. Word has length 21 [2018-11-28 12:53:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:07,663 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 139 transitions. [2018-11-28 12:53:07,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 12:53:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 139 transitions. [2018-11-28 12:53:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 12:53:07,664 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:07,664 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:07,664 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:07,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:07,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1988705185, now seen corresponding path program 1 times [2018-11-28 12:53:07,665 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:07,665 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:07,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:07,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:07,757 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:07,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:07,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:53:07,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:53:07,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:53:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:53:07,759 INFO L87 Difference]: Start difference. First operand 90 states and 139 transitions. Second operand 5 states. [2018-11-28 12:53:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:07,942 INFO L93 Difference]: Finished difference Result 173 states and 282 transitions. [2018-11-28 12:53:07,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:53:07,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-28 12:53:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:07,944 INFO L225 Difference]: With dead ends: 173 [2018-11-28 12:53:07,944 INFO L226 Difference]: Without dead ends: 141 [2018-11-28 12:53:07,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:53:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-11-28 12:53:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 90. [2018-11-28 12:53:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-28 12:53:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 139 transitions. [2018-11-28 12:53:07,955 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 139 transitions. Word has length 22 [2018-11-28 12:53:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:07,955 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 139 transitions. [2018-11-28 12:53:07,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:53:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 139 transitions. [2018-11-28 12:53:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-28 12:53:07,956 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:07,956 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:07,956 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:07,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1386022735, now seen corresponding path program 1 times [2018-11-28 12:53:07,957 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:07,957 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:07,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:08,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:08,061 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:08,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:08,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-28 12:53:08,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 12:53:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 12:53:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:53:08,066 INFO L87 Difference]: Start difference. First operand 90 states and 139 transitions. Second operand 7 states. [2018-11-28 12:53:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:08,258 INFO L93 Difference]: Finished difference Result 215 states and 343 transitions. [2018-11-28 12:53:08,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:53:08,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-11-28 12:53:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:08,260 INFO L225 Difference]: With dead ends: 215 [2018-11-28 12:53:08,261 INFO L226 Difference]: Without dead ends: 183 [2018-11-28 12:53:08,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:53:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-28 12:53:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2018-11-28 12:53:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-28 12:53:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 183 transitions. [2018-11-28 12:53:08,271 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 183 transitions. Word has length 23 [2018-11-28 12:53:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:08,271 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 183 transitions. [2018-11-28 12:53:08,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 12:53:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 183 transitions. [2018-11-28 12:53:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-28 12:53:08,272 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:08,272 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:08,273 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:08,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1127857297, now seen corresponding path program 1 times [2018-11-28 12:53:08,273 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:08,273 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:08,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:08,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:08,359 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:08,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:08,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:53:08,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:53:08,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:53:08,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:53:08,361 INFO L87 Difference]: Start difference. First operand 120 states and 183 transitions. Second operand 6 states. [2018-11-28 12:53:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:08,556 INFO L93 Difference]: Finished difference Result 234 states and 364 transitions. [2018-11-28 12:53:08,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:53:08,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-11-28 12:53:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:08,558 INFO L225 Difference]: With dead ends: 234 [2018-11-28 12:53:08,558 INFO L226 Difference]: Without dead ends: 202 [2018-11-28 12:53:08,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:53:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-11-28 12:53:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 96. [2018-11-28 12:53:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-28 12:53:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2018-11-28 12:53:08,567 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 23 [2018-11-28 12:53:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:08,567 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2018-11-28 12:53:08,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:53:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2018-11-28 12:53:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-28 12:53:08,568 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:08,568 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:08,569 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:08,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash 214387631, now seen corresponding path program 1 times [2018-11-28 12:53:08,569 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:08,569 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:08,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:08,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:08,616 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:08,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:08,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:53:08,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 12:53:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 12:53:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:53:08,621 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. Second operand 4 states. [2018-11-28 12:53:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:08,704 INFO L93 Difference]: Finished difference Result 254 states and 370 transitions. [2018-11-28 12:53:08,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 12:53:08,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2018-11-28 12:53:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:08,705 INFO L225 Difference]: With dead ends: 254 [2018-11-28 12:53:08,705 INFO L226 Difference]: Without dead ends: 180 [2018-11-28 12:53:08,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:53:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-11-28 12:53:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 106. [2018-11-28 12:53:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-28 12:53:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2018-11-28 12:53:08,713 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 34 [2018-11-28 12:53:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:08,713 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2018-11-28 12:53:08,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 12:53:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2018-11-28 12:53:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-28 12:53:08,714 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:08,715 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:08,715 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:08,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1041972219, now seen corresponding path program 1 times [2018-11-28 12:53:08,715 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:08,715 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:08,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:08,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:08,808 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:08,810 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:08,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:53:08,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:53:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:53:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:53:08,811 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand 5 states. [2018-11-28 12:53:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:08,892 INFO L93 Difference]: Finished difference Result 334 states and 488 transitions. [2018-11-28 12:53:08,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:53:08,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2018-11-28 12:53:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:08,894 INFO L225 Difference]: With dead ends: 334 [2018-11-28 12:53:08,894 INFO L226 Difference]: Without dead ends: 260 [2018-11-28 12:53:08,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:53:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-11-28 12:53:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 106. [2018-11-28 12:53:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-28 12:53:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2018-11-28 12:53:08,901 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 35 [2018-11-28 12:53:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:08,901 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2018-11-28 12:53:08,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:53:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2018-11-28 12:53:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-28 12:53:08,903 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:08,903 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:08,903 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:08,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 919023332, now seen corresponding path program 1 times [2018-11-28 12:53:08,904 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:08,904 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:08,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:08,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:08,977 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:08,978 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:08,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-28 12:53:08,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 12:53:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 12:53:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:53:08,979 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand 7 states. [2018-11-28 12:53:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:09,091 INFO L93 Difference]: Finished difference Result 408 states and 594 transitions. [2018-11-28 12:53:09,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:53:09,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2018-11-28 12:53:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:09,093 INFO L225 Difference]: With dead ends: 408 [2018-11-28 12:53:09,093 INFO L226 Difference]: Without dead ends: 334 [2018-11-28 12:53:09,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:53:09,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-11-28 12:53:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 166. [2018-11-28 12:53:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-11-28 12:53:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2018-11-28 12:53:09,104 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 36 [2018-11-28 12:53:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:09,104 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2018-11-28 12:53:09,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 12:53:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2018-11-28 12:53:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-28 12:53:09,106 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:09,106 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:09,106 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:09,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1452715930, now seen corresponding path program 1 times [2018-11-28 12:53:09,107 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:09,107 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:09,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:09,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:09,170 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:53:09,170 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:53:09,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:53:09,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:53:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:53:09,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:53:09,171 INFO L87 Difference]: Start difference. First operand 166 states and 236 transitions. Second operand 6 states. [2018-11-28 12:53:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:09,311 INFO L93 Difference]: Finished difference Result 406 states and 588 transitions. [2018-11-28 12:53:09,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:53:09,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-11-28 12:53:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:09,313 INFO L225 Difference]: With dead ends: 406 [2018-11-28 12:53:09,313 INFO L226 Difference]: Without dead ends: 332 [2018-11-28 12:53:09,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:53:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-11-28 12:53:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 156. [2018-11-28 12:53:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-28 12:53:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 221 transitions. [2018-11-28 12:53:09,320 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 221 transitions. Word has length 36 [2018-11-28 12:53:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:09,321 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 221 transitions. [2018-11-28 12:53:09,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:53:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 221 transitions. [2018-11-28 12:53:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-28 12:53:09,321 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:09,322 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:09,322 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:09,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:09,322 INFO L82 PathProgramCache]: Analyzing trace with hash 617124283, now seen corresponding path program 1 times [2018-11-28 12:53:09,322 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:09,322 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:09,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:09,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:09,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 12:53:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:09,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:53:09,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-28 12:53:09,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:53:09,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:53:09,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:53:09,403 INFO L87 Difference]: Start difference. First operand 156 states and 221 transitions. Second operand 8 states. [2018-11-28 12:53:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:09,773 INFO L93 Difference]: Finished difference Result 531 states and 806 transitions. [2018-11-28 12:53:09,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:53:09,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2018-11-28 12:53:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:09,775 INFO L225 Difference]: With dead ends: 531 [2018-11-28 12:53:09,775 INFO L226 Difference]: Without dead ends: 455 [2018-11-28 12:53:09,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:53:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2018-11-28 12:53:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 395. [2018-11-28 12:53:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-11-28 12:53:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 566 transitions. [2018-11-28 12:53:09,795 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 566 transitions. Word has length 38 [2018-11-28 12:53:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:09,795 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 566 transitions. [2018-11-28 12:53:09,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:53:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 566 transitions. [2018-11-28 12:53:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 12:53:09,796 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:09,796 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:09,796 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:09,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:09,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1319658960, now seen corresponding path program 1 times [2018-11-28 12:53:09,797 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:09,797 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:09,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:09,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:09,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 12:53:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:09,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:53:09,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-28 12:53:09,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:53:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:53:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:53:09,896 INFO L87 Difference]: Start difference. First operand 395 states and 566 transitions. Second operand 8 states. [2018-11-28 12:53:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:10,265 INFO L93 Difference]: Finished difference Result 1332 states and 1992 transitions. [2018-11-28 12:53:10,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:53:10,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 12:53:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:10,268 INFO L225 Difference]: With dead ends: 1332 [2018-11-28 12:53:10,269 INFO L226 Difference]: Without dead ends: 1122 [2018-11-28 12:53:10,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:53:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2018-11-28 12:53:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 885. [2018-11-28 12:53:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2018-11-28 12:53:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1279 transitions. [2018-11-28 12:53:10,303 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1279 transitions. Word has length 40 [2018-11-28 12:53:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:10,303 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 1279 transitions. [2018-11-28 12:53:10,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:53:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1279 transitions. [2018-11-28 12:53:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-28 12:53:10,305 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:10,305 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:53:10,305 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:10,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash -677622459, now seen corresponding path program 1 times [2018-11-28 12:53:10,306 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:10,306 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:10,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:10,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:10,371 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 12:53:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:53:10,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:53:10,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-28 12:53:10,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:53:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:53:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:53:10,390 INFO L87 Difference]: Start difference. First operand 885 states and 1279 transitions. Second operand 6 states. [2018-11-28 12:53:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:53:10,600 INFO L93 Difference]: Finished difference Result 1637 states and 2529 transitions. [2018-11-28 12:53:10,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:53:10,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2018-11-28 12:53:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:53:10,604 INFO L225 Difference]: With dead ends: 1637 [2018-11-28 12:53:10,604 INFO L226 Difference]: Without dead ends: 1359 [2018-11-28 12:53:10,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:53:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2018-11-28 12:53:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1180. [2018-11-28 12:53:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-11-28 12:53:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1770 transitions. [2018-11-28 12:53:10,642 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1770 transitions. Word has length 42 [2018-11-28 12:53:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:53:10,643 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 1770 transitions. [2018-11-28 12:53:10,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:53:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1770 transitions. [2018-11-28 12:53:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-28 12:53:10,644 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:53:10,644 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-11-28 12:53:10,644 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:53:10,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:53:10,644 INFO L82 PathProgramCache]: Analyzing trace with hash -313662180, now seen corresponding path program 1 times [2018-11-28 12:53:10,645 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:53:10,645 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:53:10,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:53:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:53:10,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:53:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:53:11,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 12:53:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:53:13,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:53:13,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-11-28 12:53:13,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-28 12:53:13,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-28 12:53:13,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:53:13,739 INFO L87 Difference]: Start difference. First operand 1180 states and 1770 transitions. Second operand 44 states. [2018-11-28 12:53:30,592 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2018-11-28 12:53:32,772 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2018-11-28 12:53:34,693 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2018-11-28 12:53:35,386 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2018-11-28 12:53:39,361 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2018-11-28 12:53:39,953 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2018-11-28 12:53:40,250 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2018-11-28 12:53:40,838 WARN L180 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2018-11-28 12:53:41,158 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2018-11-28 12:53:41,979 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2018-11-28 12:53:42,351 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2018-11-28 12:53:42,843 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2018-11-28 12:53:43,102 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2018-11-28 12:53:43,497 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2018-11-28 12:53:44,257 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2018-11-28 12:53:45,107 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2018-11-28 12:53:45,416 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2018-11-28 12:53:46,866 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2018-11-28 12:53:47,753 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2018-11-28 12:53:49,510 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2018-11-28 12:53:49,928 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2018-11-28 12:53:51,717 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2018-11-28 12:53:52,601 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 108 [2018-11-28 12:53:54,150 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2018-11-28 12:53:55,182 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2018-11-28 12:53:56,694 WARN L180 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2018-11-28 12:53:57,376 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 99 [2018-11-28 12:53:57,964 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2018-11-28 12:53:59,538 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2018-11-28 12:54:00,905 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2018-11-28 12:54:01,236 WARN L180 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2018-11-28 12:54:01,591 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2018-11-28 12:54:03,060 WARN L180 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 117 [2018-11-28 12:54:03,631 WARN L180 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2018-11-28 12:54:03,962 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2018-11-28 12:54:04,796 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2018-11-28 12:54:06,006 WARN L180 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 102 [2018-11-28 12:54:06,800 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2018-11-28 12:54:07,380 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2018-11-28 12:54:08,098 WARN L180 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2018-11-28 12:54:09,687 WARN L180 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2018-11-28 12:54:10,144 WARN L180 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2018-11-28 12:54:11,111 WARN L180 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 120 [2018-11-28 12:54:11,661 WARN L180 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2018-11-28 12:54:11,965 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2018-11-28 12:54:12,816 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2018-11-28 12:54:13,517 WARN L180 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2018-11-28 12:54:14,496 WARN L180 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2018-11-28 12:54:15,759 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2018-11-28 12:54:16,467 WARN L180 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 119 [2018-11-28 12:54:18,666 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2018-11-28 12:54:19,092 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2018-11-28 12:54:20,127 WARN L180 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 123 [2018-11-28 12:54:20,898 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2018-11-28 12:54:21,690 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2018-11-28 12:54:23,091 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2018-11-28 12:54:23,561 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2018-11-28 12:54:24,321 WARN L180 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2018-11-28 12:54:24,964 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2018-11-28 12:54:25,362 WARN L180 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2018-11-28 12:54:26,179 WARN L180 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2018-11-28 12:54:26,521 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 100 [2018-11-28 12:54:26,927 WARN L180 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 [2018-11-28 12:54:27,645 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2018-11-28 12:54:27,929 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2018-11-28 12:54:28,383 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2018-11-28 12:54:28,897 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2018-11-28 12:54:29,387 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2018-11-28 12:54:30,701 WARN L180 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 103 [2018-11-28 12:54:31,139 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2018-11-28 12:54:31,536 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2018-11-28 12:54:32,066 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2018-11-28 12:54:32,728 WARN L180 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2018-11-28 12:54:33,084 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2018-11-28 12:54:33,479 WARN L180 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 111 [2018-11-28 12:54:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:54:33,543 INFO L93 Difference]: Finished difference Result 10401 states and 15820 transitions. [2018-11-28 12:54:33,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2018-11-28 12:54:33,543 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 60 [2018-11-28 12:54:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:54:33,560 INFO L225 Difference]: With dead ends: 10401 [2018-11-28 12:54:33,560 INFO L226 Difference]: Without dead ends: 10205 [2018-11-28 12:54:33,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32087 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=18847, Invalid=70853, Unknown=0, NotChecked=0, Total=89700 [2018-11-28 12:54:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10205 states. [2018-11-28 12:54:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10205 to 4459. [2018-11-28 12:54:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4459 states. [2018-11-28 12:54:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 6911 transitions. [2018-11-28 12:54:33,761 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 6911 transitions. Word has length 60 [2018-11-28 12:54:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:54:33,761 INFO L480 AbstractCegarLoop]: Abstraction has 4459 states and 6911 transitions. [2018-11-28 12:54:33,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-28 12:54:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 6911 transitions. [2018-11-28 12:54:33,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-28 12:54:33,763 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:54:33,763 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-11-28 12:54:33,764 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:54:33,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:54:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1987160410, now seen corresponding path program 1 times [2018-11-28 12:54:33,764 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:54:33,764 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:54:33,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:54:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:54:33,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:54:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 12:54:33,887 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 12:54:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 12:54:33,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:54:33,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2018-11-28 12:54:33,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:54:33,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:54:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:54:33,909 INFO L87 Difference]: Start difference. First operand 4459 states and 6911 transitions. Second operand 8 states. [2018-11-28 12:54:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:54:34,710 INFO L93 Difference]: Finished difference Result 10009 states and 15546 transitions. [2018-11-28 12:54:34,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 12:54:34,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2018-11-28 12:54:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:54:34,725 INFO L225 Difference]: With dead ends: 10009 [2018-11-28 12:54:34,725 INFO L226 Difference]: Without dead ends: 5616 [2018-11-28 12:54:34,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:54:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2018-11-28 12:54:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 4815. [2018-11-28 12:54:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4815 states. [2018-11-28 12:54:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 7218 transitions. [2018-11-28 12:54:35,007 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 7218 transitions. Word has length 60 [2018-11-28 12:54:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:54:35,007 INFO L480 AbstractCegarLoop]: Abstraction has 4815 states and 7218 transitions. [2018-11-28 12:54:35,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:54:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 7218 transitions. [2018-11-28 12:54:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-28 12:54:35,009 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:54:35,009 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-11-28 12:54:35,009 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:54:35,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:54:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1930321118, now seen corresponding path program 1 times [2018-11-28 12:54:35,010 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:54:35,010 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:54:35,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:54:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:54:35,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:54:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 12:54:35,076 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 12:54:35,078 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:54:35,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 12:54:35,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 12:54:35,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 12:54:35,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:54:35,079 INFO L87 Difference]: Start difference. First operand 4815 states and 7218 transitions. Second operand 3 states. [2018-11-28 12:54:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:54:35,341 INFO L93 Difference]: Finished difference Result 5669 states and 8305 transitions. [2018-11-28 12:54:35,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 12:54:35,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2018-11-28 12:54:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:54:35,355 INFO L225 Difference]: With dead ends: 5669 [2018-11-28 12:54:35,355 INFO L226 Difference]: Without dead ends: 5610 [2018-11-28 12:54:35,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:54:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5610 states. [2018-11-28 12:54:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5610 to 5123. [2018-11-28 12:54:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5123 states. [2018-11-28 12:54:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5123 states to 5123 states and 7636 transitions. [2018-11-28 12:54:35,599 INFO L78 Accepts]: Start accepts. Automaton has 5123 states and 7636 transitions. Word has length 60 [2018-11-28 12:54:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:54:35,599 INFO L480 AbstractCegarLoop]: Abstraction has 5123 states and 7636 transitions. [2018-11-28 12:54:35,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 12:54:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5123 states and 7636 transitions. [2018-11-28 12:54:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-28 12:54:35,601 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:54:35,601 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-11-28 12:54:35,601 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:54:35,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:54:35,602 INFO L82 PathProgramCache]: Analyzing trace with hash -666750562, now seen corresponding path program 1 times [2018-11-28 12:54:35,602 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:54:35,602 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:54:35,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:54:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:54:35,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:54:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 12:54:35,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 12:54:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 12:54:35,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:54:35,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-28 12:54:35,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:54:35,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:54:35,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:54:35,725 INFO L87 Difference]: Start difference. First operand 5123 states and 7636 transitions. Second operand 12 states. [2018-11-28 12:54:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:54:36,413 INFO L93 Difference]: Finished difference Result 8814 states and 13182 transitions. [2018-11-28 12:54:36,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:54:36,413 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2018-11-28 12:54:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:54:36,422 INFO L225 Difference]: With dead ends: 8814 [2018-11-28 12:54:36,422 INFO L226 Difference]: Without dead ends: 6065 [2018-11-28 12:54:36,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:54:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2018-11-28 12:54:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5218. [2018-11-28 12:54:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2018-11-28 12:54:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7607 transitions. [2018-11-28 12:54:36,601 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7607 transitions. Word has length 60 [2018-11-28 12:54:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:54:36,601 INFO L480 AbstractCegarLoop]: Abstraction has 5218 states and 7607 transitions. [2018-11-28 12:54:36,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:54:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7607 transitions. [2018-11-28 12:54:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-28 12:54:36,603 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:54:36,603 INFO L402 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] [2018-11-28 12:54:36,603 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:54:36,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:54:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1543067804, now seen corresponding path program 1 times [2018-11-28 12:54:36,604 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 12:54:36,604 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 12:54:36,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:54:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:54:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:54:36,716 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 12:54:36,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:54:36 BoogieIcfgContainer [2018-11-28 12:54:36,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:54:36,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:54:36,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:54:36,761 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:54:36,761 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:53:07" (3/4) ... [2018-11-28 12:54:36,764 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 12:54:36,842 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7b062cb6-2c82-49b2-ac2c-237c3c152fc7/bin-2019/uautomizer/witness.graphml [2018-11-28 12:54:36,842 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:54:36,842 INFO L168 Benchmark]: Toolchain (without parser) took 90136.09 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 361.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -154.2 MB). Peak memory consumption was 207.0 MB. Max. memory is 11.5 GB. [2018-11-28 12:54:36,843 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:54:36,843 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.18 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 927.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:54:36,843 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.79 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:54:36,843 INFO L168 Benchmark]: Boogie Preprocessor took 71.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 927.3 MB in the beginning and 1.2 GB in the end (delta: -226.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:54:36,844 INFO L168 Benchmark]: RCFGBuilder took 234.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2018-11-28 12:54:36,844 INFO L168 Benchmark]: TraceAbstraction took 89528.70 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 196.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 223.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:54:36,844 INFO L168 Benchmark]: Witness Printer took 82.57 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. [2018-11-28 12:54:36,846 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 199.18 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 927.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.79 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 71.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 927.3 MB in the beginning and 1.2 GB in the end (delta: -226.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 234.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 89528.70 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 196.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 223.1 MB. Max. memory is 11.5 GB. * Witness Printer took 82.57 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L105] unsigned int a, b, r; [L107] a = __VERIFIER_nondet_uint() [L108] b = __VERIFIER_nondet_uint() [L110] CALL, EXPR mp_add(a, b) VAL [\old(a)=35, \old(b)=220] [L23] unsigned char a0, a1, a2, a3; [L24] unsigned char b0, b1, b2, b3; [L25] unsigned char r0, r1, r2, r3; [L26] unsigned short carry; [L27] unsigned short partial_sum; [L28] unsigned int r; [L29] unsigned char i; [L30] unsigned char na, nb; [L31] a0 = a [L32] a1 = a >> 8 [L33] a2 = a >> 16U [L34] a3 = a >> 24U [L35] b0 = b [L36] b1 = b >> 8U [L37] b2 = b >> 16U [L38] b3 = b >> 24U [L39] na = (unsigned char)4 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=4] [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=3] [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=2] [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=1] [L49] nb = (unsigned char)4 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=1, nb=4] [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=1, nb=3] [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=1, nb=2] [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, na=1, nb=1] [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L64] COND TRUE i < na VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=35] [L66] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=35] [L67] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=35] [L68] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=35] [L70] COND TRUE i < nb VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=35] [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L72] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L73] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L74] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L76] COND TRUE partial_sum > ((unsigned char)254) [L77] partial_sum = partial_sum & ((unsigned char)255) [L78] carry = (unsigned short)1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255] [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L81] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L82] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L83] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L85] i = i + (unsigned char)1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=1, i=1, na=1, nb=1, partial_sum=255, r0=-1] [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L64] COND FALSE !(i < na) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L70] COND FALSE !(i < nb) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L76] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L80] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L81] COND TRUE i == (unsigned char)1 [L81] r1 = (unsigned char)partial_sum VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L82] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L83] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L85] i = i + (unsigned char)1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L88] COND TRUE i < (unsigned char)4 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L89] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L90] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L92] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L94] i = i + (unsigned char)1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L88] COND TRUE i < (unsigned char)4 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L89] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L90] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L91] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L94] i = i + (unsigned char)1 VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L88] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=35, \old(b)=220, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; VAL [\old(a)=35, \old(b)=220, \result=511, a=35, a0=35, a1=0, a2=0, a3=0, b=220, b0=-36, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r=511, r0=-1, r1=1, r2=0, r3=0] [L110] RET, EXPR mp_add(a, b) VAL [a=35, b=220, mp_add(a, b)=511] [L110] r = mp_add(a, b) [L112] CALL __VERIFIER_assert(r == a + b) VAL [\old(cond)=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. UNSAFE Result, 89.4s OverallTime, 17 OverallIterations, 3 TraceHistogramMax, 83.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1916 SDtfs, 6254 SDslu, 9707 SDs, 0 SdLazy, 15633 SolverSat, 1216 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1175 GetRequests, 788 SyntacticMatches, 4 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32199 ImplicationChecksByTransitivity, 65.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5218occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 9154 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 674 NumberOfCodeBlocks, 674 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 889 ConstructedInterpolants, 0 QuantifiedInterpolants, 363706 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1133 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 22 InterpolantComputations, 10 PerfectInterpolantSequences, 125/164 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...