./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 0.1.24-cad4683 [2019-11-15 22:46:22,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:46:22,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:46:22,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:46:22,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:46:22,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:46:22,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:46:22,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:46:22,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:46:22,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:46:22,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:46:22,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:46:22,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:46:22,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:46:22,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:46:22,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:46:22,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:46:22,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:46:22,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:46:22,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:46:22,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:46:22,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:46:22,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:46:22,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:46:22,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:46:22,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:46:22,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:46:22,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:46:22,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:46:22,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:46:22,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:46:22,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:46:22,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:46:22,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:46:22,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:46:22,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:46:22,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:46:22,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:46:22,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:46:22,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:46:22,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:46:22,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 22:46:22,559 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:46:22,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:46:22,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:46:22,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:46:22,571 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:46:22,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:46:22,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:46:22,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:46:22,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:46:22,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:46:22,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:46:22,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:46:22,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:46:22,573 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:46:22,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:46:22,573 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:46:22,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:46:22,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:46:22,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:46:22,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:46:22,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:46:22,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:46:22,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:46:22,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:46:22,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:46:22,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:46:22,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:46:22,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:46:22,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2019-11-15 22:46:22,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:46:22,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:46:22,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:46:22,616 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:46:22,617 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:46:22,617 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-15 22:46:22,676 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/b48d3d39f/4553c0f19094469bbfdd6a64f91b33ed/FLAGaad1cdfdf [2019-11-15 22:46:23,075 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:46:23,076 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-15 22:46:23,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/b48d3d39f/4553c0f19094469bbfdd6a64f91b33ed/FLAGaad1cdfdf [2019-11-15 22:46:23,474 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/b48d3d39f/4553c0f19094469bbfdd6a64f91b33ed [2019-11-15 22:46:23,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:46:23,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:46:23,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:46:23,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:46:23,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:46:23,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458dbaf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23, skipping insertion in model container [2019-11-15 22:46:23,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,506 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:46:23,526 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:46:23,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:46:23,826 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:46:23,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:46:23,882 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:46:23,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23 WrapperNode [2019-11-15 22:46:23,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:46:23,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:46:23,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:46:23,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:46:23,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:46:23,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:46:23,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:46:23,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:46:23,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... [2019-11-15 22:46:23,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:46:23,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:46:23,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:46:23,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:46:23,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:46:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:46:24,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:46:24,345 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:46:24,345 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-15 22:46:24,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:46:24 BoogieIcfgContainer [2019-11-15 22:46:24,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:46:24,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:46:24,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:46:24,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:46:24,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:46:23" (1/3) ... [2019-11-15 22:46:24,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4536ad54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:46:24, skipping insertion in model container [2019-11-15 22:46:24,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:23" (2/3) ... [2019-11-15 22:46:24,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4536ad54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:46:24, skipping insertion in model container [2019-11-15 22:46:24,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:46:24" (3/3) ... [2019-11-15 22:46:24,353 INFO L109 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2019-11-15 22:46:24,361 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:46:24,373 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:46:24,383 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:46:24,404 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:46:24,404 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:46:24,404 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:46:24,405 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:46:24,405 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:46:24,405 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:46:24,405 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:46:24,405 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:46:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-15 22:46:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:46:24,425 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:24,425 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:24,427 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1818568748, now seen corresponding path program 1 times [2019-11-15 22:46:24,440 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:24,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116902768] [2019-11-15 22:46:24,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:24,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:24,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:24,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116902768] [2019-11-15 22:46:24,556 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:24,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 22:46:24,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740717972] [2019-11-15 22:46:24,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:46:24,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:46:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:46:24,575 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-11-15 22:46:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:24,592 INFO L93 Difference]: Finished difference Result 56 states and 91 transitions. [2019-11-15 22:46:24,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:46:24,594 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-15 22:46:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:24,603 INFO L225 Difference]: With dead ends: 56 [2019-11-15 22:46:24,603 INFO L226 Difference]: Without dead ends: 37 [2019-11-15 22:46:24,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:46:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-15 22:46:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-15 22:46:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-15 22:46:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2019-11-15 22:46:24,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 11 [2019-11-15 22:46:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:24,639 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2019-11-15 22:46:24,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:46:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2019-11-15 22:46:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:46:24,640 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:24,641 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:24,641 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash -927982706, now seen corresponding path program 1 times [2019-11-15 22:46:24,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:24,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568179104] [2019-11-15 22:46:24,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:24,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:24,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:24,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568179104] [2019-11-15 22:46:24,746 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:24,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:46:24,746 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485121680] [2019-11-15 22:46:24,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:46:24,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:46:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:46:24,748 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand 3 states. [2019-11-15 22:46:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:24,946 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2019-11-15 22:46:24,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:46:24,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-15 22:46:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:24,949 INFO L225 Difference]: With dead ends: 88 [2019-11-15 22:46:24,949 INFO L226 Difference]: Without dead ends: 60 [2019-11-15 22:46:24,950 INFO L600 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 [2019-11-15 22:46:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-15 22:46:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-15 22:46:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-15 22:46:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 88 transitions. [2019-11-15 22:46:24,962 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 88 transitions. Word has length 11 [2019-11-15 22:46:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:24,963 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 88 transitions. [2019-11-15 22:46:24,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:46:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 88 transitions. [2019-11-15 22:46:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 22:46:24,964 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:24,964 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:24,965 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2028683165, now seen corresponding path program 1 times [2019-11-15 22:46:24,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:24,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400505265] [2019-11-15 22:46:24,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:24,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:24,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:25,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400505265] [2019-11-15 22:46:25,105 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:25,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:46:25,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572304495] [2019-11-15 22:46:25,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:46:25,106 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:25,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:46:25,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:46:25,107 INFO L87 Difference]: Start difference. First operand 58 states and 88 transitions. Second operand 5 states. [2019-11-15 22:46:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:25,451 INFO L93 Difference]: Finished difference Result 151 states and 230 transitions. [2019-11-15 22:46:25,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:46:25,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-15 22:46:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:25,453 INFO L225 Difference]: With dead ends: 151 [2019-11-15 22:46:25,453 INFO L226 Difference]: Without dead ends: 108 [2019-11-15 22:46:25,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-15 22:46:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2019-11-15 22:46:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-15 22:46:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 98 transitions. [2019-11-15 22:46:25,468 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 98 transitions. Word has length 17 [2019-11-15 22:46:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:25,468 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 98 transitions. [2019-11-15 22:46:25,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:46:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 98 transitions. [2019-11-15 22:46:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 22:46:25,469 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:25,469 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:25,470 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:25,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:25,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1576590710, now seen corresponding path program 1 times [2019-11-15 22:46:25,476 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:25,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011928239] [2019-11-15 22:46:25,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:25,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:25,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:25,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011928239] [2019-11-15 22:46:25,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:25,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:46:25,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806251453] [2019-11-15 22:46:25,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:46:25,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:46:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:46:25,581 INFO L87 Difference]: Start difference. First operand 65 states and 98 transitions. Second operand 5 states. [2019-11-15 22:46:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:25,909 INFO L93 Difference]: Finished difference Result 152 states and 230 transitions. [2019-11-15 22:46:25,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:46:25,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-15 22:46:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:25,911 INFO L225 Difference]: With dead ends: 152 [2019-11-15 22:46:25,911 INFO L226 Difference]: Without dead ends: 114 [2019-11-15 22:46:25,911 INFO L600 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 [2019-11-15 22:46:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-15 22:46:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2019-11-15 22:46:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-15 22:46:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 110 transitions. [2019-11-15 22:46:25,921 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 110 transitions. Word has length 18 [2019-11-15 22:46:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:25,921 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 110 transitions. [2019-11-15 22:46:25,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:46:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 110 transitions. [2019-11-15 22:46:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 22:46:25,927 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:25,928 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:25,928 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash 511533202, now seen corresponding path program 1 times [2019-11-15 22:46:25,929 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:25,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022480658] [2019-11-15 22:46:25,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:25,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:25,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:26,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022480658] [2019-11-15 22:46:26,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323030394] [2019-11-15 22:46:26,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:26,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:46:26,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:26,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:26,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-11-15 22:46:26,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135267476] [2019-11-15 22:46:26,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:46:26,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:26,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:46:26,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:26,118 INFO L87 Difference]: Start difference. First operand 76 states and 110 transitions. Second operand 4 states. [2019-11-15 22:46:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:26,378 INFO L93 Difference]: Finished difference Result 145 states and 236 transitions. [2019-11-15 22:46:26,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:46:26,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-15 22:46:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:26,380 INFO L225 Difference]: With dead ends: 145 [2019-11-15 22:46:26,380 INFO L226 Difference]: Without dead ends: 117 [2019-11-15 22:46:26,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-15 22:46:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2019-11-15 22:46:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-15 22:46:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2019-11-15 22:46:26,404 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 19 [2019-11-15 22:46:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:26,405 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2019-11-15 22:46:26,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:46:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2019-11-15 22:46:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 22:46:26,409 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:26,409 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:26,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:26,614 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:26,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:26,614 INFO L82 PathProgramCache]: Analyzing trace with hash 817706659, now seen corresponding path program 1 times [2019-11-15 22:46:26,614 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:26,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336364455] [2019-11-15 22:46:26,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:26,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:26,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:26,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336364455] [2019-11-15 22:46:26,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257526828] [2019-11-15 22:46:26,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:26,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:46:26,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 22:46:26,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:26,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2019-11-15 22:46:26,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416896360] [2019-11-15 22:46:26,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:46:26,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:46:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:26,818 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 4 states. [2019-11-15 22:46:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:29,212 INFO L93 Difference]: Finished difference Result 211 states and 312 transitions. [2019-11-15 22:46:29,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:46:29,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-15 22:46:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:29,213 INFO L225 Difference]: With dead ends: 211 [2019-11-15 22:46:29,214 INFO L226 Difference]: Without dead ends: 144 [2019-11-15 22:46:29,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-15 22:46:29,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2019-11-15 22:46:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-15 22:46:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2019-11-15 22:46:29,234 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 25 [2019-11-15 22:46:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:29,234 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2019-11-15 22:46:29,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:46:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2019-11-15 22:46:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 22:46:29,236 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:29,236 INFO L380 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] [2019-11-15 22:46:29,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:29,450 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1454047176, now seen corresponding path program 1 times [2019-11-15 22:46:29,451 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:29,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403121202] [2019-11-15 22:46:29,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:29,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:29,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:29,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403121202] [2019-11-15 22:46:29,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611030728] [2019-11-15 22:46:29,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:29,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:46:29,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-15 22:46:29,631 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:29,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-11-15 22:46:29,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945655286] [2019-11-15 22:46:29,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:46:29,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:29,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:46:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:46:29,632 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand 4 states. [2019-11-15 22:46:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:31,968 INFO L93 Difference]: Finished difference Result 257 states and 364 transitions. [2019-11-15 22:46:31,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:46:31,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-15 22:46:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:31,972 INFO L225 Difference]: With dead ends: 257 [2019-11-15 22:46:31,972 INFO L226 Difference]: Without dead ends: 167 [2019-11-15 22:46:31,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:46:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-15 22:46:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2019-11-15 22:46:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-15 22:46:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2019-11-15 22:46:31,987 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 31 [2019-11-15 22:46:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:31,991 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2019-11-15 22:46:31,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:46:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2019-11-15 22:46:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 22:46:31,995 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:31,996 INFO L380 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] [2019-11-15 22:46:32,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:32,197 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 153643337, now seen corresponding path program 1 times [2019-11-15 22:46:32,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:32,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502377162] [2019-11-15 22:46:32,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:32,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:32,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-15 22:46:32,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502377162] [2019-11-15 22:46:32,285 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:32,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:46:32,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216112243] [2019-11-15 22:46:32,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:46:32,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:46:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:32,287 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 6 states. [2019-11-15 22:46:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:32,778 INFO L93 Difference]: Finished difference Result 515 states and 671 transitions. [2019-11-15 22:46:32,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:46:32,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-15 22:46:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:32,781 INFO L225 Difference]: With dead ends: 515 [2019-11-15 22:46:32,781 INFO L226 Difference]: Without dead ends: 399 [2019-11-15 22:46:32,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:46:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-11-15 22:46:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 145. [2019-11-15 22:46:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-15 22:46:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2019-11-15 22:46:32,793 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 37 [2019-11-15 22:46:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:32,793 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2019-11-15 22:46:32,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:46:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2019-11-15 22:46:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-15 22:46:32,794 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:32,794 INFO L380 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] [2019-11-15 22:46:32,795 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1738720613, now seen corresponding path program 1 times [2019-11-15 22:46:32,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:32,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975069133] [2019-11-15 22:46:32,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:32,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:32,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-15 22:46:32,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975069133] [2019-11-15 22:46:32,896 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:32,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-15 22:46:32,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993939519] [2019-11-15 22:46:32,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:46:32,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:46:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:32,898 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 6 states. [2019-11-15 22:46:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:33,357 INFO L93 Difference]: Finished difference Result 499 states and 651 transitions. [2019-11-15 22:46:33,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:46:33,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-11-15 22:46:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:33,361 INFO L225 Difference]: With dead ends: 499 [2019-11-15 22:46:33,361 INFO L226 Difference]: Without dead ends: 384 [2019-11-15 22:46:33,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:46:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2019-11-15 22:46:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 311. [2019-11-15 22:46:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-11-15 22:46:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 416 transitions. [2019-11-15 22:46:33,377 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 416 transitions. Word has length 38 [2019-11-15 22:46:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:33,377 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 416 transitions. [2019-11-15 22:46:33,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:46:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 416 transitions. [2019-11-15 22:46:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 22:46:33,379 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:33,379 INFO L380 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] [2019-11-15 22:46:33,379 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:33,379 INFO L82 PathProgramCache]: Analyzing trace with hash 114978384, now seen corresponding path program 1 times [2019-11-15 22:46:33,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:33,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500730267] [2019-11-15 22:46:33,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:33,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:33,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-15 22:46:33,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500730267] [2019-11-15 22:46:33,470 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:33,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 22:46:33,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304913436] [2019-11-15 22:46:33,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:46:33,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:46:33,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:46:33,471 INFO L87 Difference]: Start difference. First operand 311 states and 416 transitions. Second operand 8 states. [2019-11-15 22:46:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:34,424 INFO L93 Difference]: Finished difference Result 1638 states and 2235 transitions. [2019-11-15 22:46:34,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:46:34,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2019-11-15 22:46:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:34,432 INFO L225 Difference]: With dead ends: 1638 [2019-11-15 22:46:34,432 INFO L226 Difference]: Without dead ends: 1318 [2019-11-15 22:46:34,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:46:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2019-11-15 22:46:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 982. [2019-11-15 22:46:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2019-11-15 22:46:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1334 transitions. [2019-11-15 22:46:34,479 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1334 transitions. Word has length 39 [2019-11-15 22:46:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:34,479 INFO L462 AbstractCegarLoop]: Abstraction has 982 states and 1334 transitions. [2019-11-15 22:46:34,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:46:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1334 transitions. [2019-11-15 22:46:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-15 22:46:34,483 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:34,483 INFO L380 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] [2019-11-15 22:46:34,484 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:34,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:34,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1859362712, now seen corresponding path program 1 times [2019-11-15 22:46:34,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:34,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551875652] [2019-11-15 22:46:34,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:34,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:34,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-15 22:46:34,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551875652] [2019-11-15 22:46:34,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119593198] [2019-11-15 22:46:34,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:34,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 22:46:34,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-15 22:46:34,751 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:34,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-15 22:46:34,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036002134] [2019-11-15 22:46:34,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:46:34,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:46:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:46:34,752 INFO L87 Difference]: Start difference. First operand 982 states and 1334 transitions. Second operand 4 states. [2019-11-15 22:46:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:34,911 INFO L93 Difference]: Finished difference Result 1371 states and 1862 transitions. [2019-11-15 22:46:34,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:46:34,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-11-15 22:46:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:34,917 INFO L225 Difference]: With dead ends: 1371 [2019-11-15 22:46:34,917 INFO L226 Difference]: Without dead ends: 1020 [2019-11-15 22:46:34,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:46:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2019-11-15 22:46:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1012. [2019-11-15 22:46:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2019-11-15 22:46:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1351 transitions. [2019-11-15 22:46:34,960 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1351 transitions. Word has length 44 [2019-11-15 22:46:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:34,961 INFO L462 AbstractCegarLoop]: Abstraction has 1012 states and 1351 transitions. [2019-11-15 22:46:34,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:46:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1351 transitions. [2019-11-15 22:46:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 22:46:34,964 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:34,964 INFO L380 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] [2019-11-15 22:46:35,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:35,175 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1051976431, now seen corresponding path program 1 times [2019-11-15 22:46:35,175 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:35,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629835809] [2019-11-15 22:46:35,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:35,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:35,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-15 22:46:35,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629835809] [2019-11-15 22:46:35,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656855842] [2019-11-15 22:46:35,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:35,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-15 22:46:35,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-15 22:46:35,600 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:35,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2019-11-15 22:46:35,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509352754] [2019-11-15 22:46:35,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 22:46:35,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:35,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 22:46:35,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:46:35,602 INFO L87 Difference]: Start difference. First operand 1012 states and 1351 transitions. Second operand 10 states. [2019-11-15 22:46:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:36,294 INFO L93 Difference]: Finished difference Result 1346 states and 1773 transitions. [2019-11-15 22:46:36,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:46:36,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-15 22:46:36,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:36,301 INFO L225 Difference]: With dead ends: 1346 [2019-11-15 22:46:36,301 INFO L226 Difference]: Without dead ends: 1224 [2019-11-15 22:46:36,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:46:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2019-11-15 22:46:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1083. [2019-11-15 22:46:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1083 states. [2019-11-15 22:46:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1445 transitions. [2019-11-15 22:46:36,348 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1445 transitions. Word has length 45 [2019-11-15 22:46:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:36,349 INFO L462 AbstractCegarLoop]: Abstraction has 1083 states and 1445 transitions. [2019-11-15 22:46:36,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 22:46:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1445 transitions. [2019-11-15 22:46:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 22:46:36,351 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:36,351 INFO L380 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] [2019-11-15 22:46:36,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:36,554 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:36,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1397623699, now seen corresponding path program 1 times [2019-11-15 22:46:36,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:36,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685731574] [2019-11-15 22:46:36,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:36,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:36,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-15 22:46:36,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685731574] [2019-11-15 22:46:36,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768832596] [2019-11-15 22:46:36,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:36,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-15 22:46:36,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 22:46:36,833 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:36,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2019-11-15 22:46:36,834 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194343801] [2019-11-15 22:46:36,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:46:36,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:46:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-15 22:46:36,835 INFO L87 Difference]: Start difference. First operand 1083 states and 1445 transitions. Second operand 7 states. [2019-11-15 22:46:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:37,511 INFO L93 Difference]: Finished difference Result 2392 states and 3203 transitions. [2019-11-15 22:46:37,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 22:46:37,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-11-15 22:46:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:37,522 INFO L225 Difference]: With dead ends: 2392 [2019-11-15 22:46:37,523 INFO L226 Difference]: Without dead ends: 1311 [2019-11-15 22:46:37,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:46:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2019-11-15 22:46:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1133. [2019-11-15 22:46:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1133 states. [2019-11-15 22:46:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1469 transitions. [2019-11-15 22:46:37,560 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1469 transitions. Word has length 45 [2019-11-15 22:46:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:37,561 INFO L462 AbstractCegarLoop]: Abstraction has 1133 states and 1469 transitions. [2019-11-15 22:46:37,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:46:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1469 transitions. [2019-11-15 22:46:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-15 22:46:37,563 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:37,563 INFO L380 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] [2019-11-15 22:46:37,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:37,767 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:37,767 INFO L82 PathProgramCache]: Analyzing trace with hash -718889683, now seen corresponding path program 1 times [2019-11-15 22:46:37,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:37,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898437001] [2019-11-15 22:46:37,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:37,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:37,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-15 22:46:37,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898437001] [2019-11-15 22:46:37,884 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:37,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-15 22:46:37,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467493582] [2019-11-15 22:46:37,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 22:46:37,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:37,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 22:46:37,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:46:37,885 INFO L87 Difference]: Start difference. First operand 1133 states and 1469 transitions. Second operand 9 states. [2019-11-15 22:46:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:38,655 INFO L93 Difference]: Finished difference Result 2417 states and 3169 transitions. [2019-11-15 22:46:38,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:46:38,655 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-11-15 22:46:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:38,662 INFO L225 Difference]: With dead ends: 2417 [2019-11-15 22:46:38,662 INFO L226 Difference]: Without dead ends: 1628 [2019-11-15 22:46:38,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-15 22:46:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2019-11-15 22:46:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1364. [2019-11-15 22:46:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1364 states. [2019-11-15 22:46:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1759 transitions. [2019-11-15 22:46:38,705 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1759 transitions. Word has length 46 [2019-11-15 22:46:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:38,706 INFO L462 AbstractCegarLoop]: Abstraction has 1364 states and 1759 transitions. [2019-11-15 22:46:38,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 22:46:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1759 transitions. [2019-11-15 22:46:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-15 22:46:38,708 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:38,708 INFO L380 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] [2019-11-15 22:46:38,708 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash 190973292, now seen corresponding path program 1 times [2019-11-15 22:46:38,709 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:38,709 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603726686] [2019-11-15 22:46:38,709 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:38,709 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:38,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-15 22:46:38,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603726686] [2019-11-15 22:46:38,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997911587] [2019-11-15 22:46:38,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:38,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 22:46:38,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-15 22:46:38,920 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:38,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 8 [2019-11-15 22:46:38,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644763895] [2019-11-15 22:46:38,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:46:38,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:38,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:46:38,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:46:38,922 INFO L87 Difference]: Start difference. First operand 1364 states and 1759 transitions. Second operand 4 states. [2019-11-15 22:46:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:39,078 INFO L93 Difference]: Finished difference Result 1825 states and 2357 transitions. [2019-11-15 22:46:39,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:46:39,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-11-15 22:46:39,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:39,086 INFO L225 Difference]: With dead ends: 1825 [2019-11-15 22:46:39,086 INFO L226 Difference]: Without dead ends: 1407 [2019-11-15 22:46:39,090 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:46:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2019-11-15 22:46:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1371. [2019-11-15 22:46:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1371 states. [2019-11-15 22:46:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1754 transitions. [2019-11-15 22:46:39,157 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1754 transitions. Word has length 48 [2019-11-15 22:46:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:39,158 INFO L462 AbstractCegarLoop]: Abstraction has 1371 states and 1754 transitions. [2019-11-15 22:46:39,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:46:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1754 transitions. [2019-11-15 22:46:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-15 22:46:39,161 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:39,161 INFO L380 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] [2019-11-15 22:46:39,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:39,367 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:39,367 INFO L82 PathProgramCache]: Analyzing trace with hash -628542036, now seen corresponding path program 1 times [2019-11-15 22:46:39,368 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:39,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130940447] [2019-11-15 22:46:39,368 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:39,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:39,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-15 22:46:39,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130940447] [2019-11-15 22:46:39,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385623349] [2019-11-15 22:46:39,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:39,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 22:46:39,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 22:46:39,745 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:39,745 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-11-15 22:46:39,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227676150] [2019-11-15 22:46:39,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 22:46:39,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 22:46:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-11-15 22:46:39,747 INFO L87 Difference]: Start difference. First operand 1371 states and 1754 transitions. Second operand 11 states. [2019-11-15 22:46:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:40,665 INFO L93 Difference]: Finished difference Result 2960 states and 3855 transitions. [2019-11-15 22:46:40,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 22:46:40,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2019-11-15 22:46:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:40,671 INFO L225 Difference]: With dead ends: 2960 [2019-11-15 22:46:40,671 INFO L226 Difference]: Without dead ends: 1645 [2019-11-15 22:46:40,673 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-11-15 22:46:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2019-11-15 22:46:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1442. [2019-11-15 22:46:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2019-11-15 22:46:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1844 transitions. [2019-11-15 22:46:40,710 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1844 transitions. Word has length 49 [2019-11-15 22:46:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:40,710 INFO L462 AbstractCegarLoop]: Abstraction has 1442 states and 1844 transitions. [2019-11-15 22:46:40,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 22:46:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1844 transitions. [2019-11-15 22:46:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-15 22:46:40,712 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:40,713 INFO L380 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] [2019-11-15 22:46:40,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:40,918 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1299730666, now seen corresponding path program 1 times [2019-11-15 22:46:40,919 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:40,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041657388] [2019-11-15 22:46:40,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:40,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:40,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-15 22:46:41,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041657388] [2019-11-15 22:46:41,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399621034] [2019-11-15 22:46:41,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:41,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-15 22:46:41,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 22:46:41,167 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:46:41,167 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2019-11-15 22:46:41,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122925106] [2019-11-15 22:46:41,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:46:41,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:46:41,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:46:41,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:46:41,169 INFO L87 Difference]: Start difference. First operand 1442 states and 1844 transitions. Second operand 6 states. [2019-11-15 22:46:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:41,575 INFO L93 Difference]: Finished difference Result 1771 states and 2254 transitions. [2019-11-15 22:46:41,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 22:46:41,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-15 22:46:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:41,581 INFO L225 Difference]: With dead ends: 1771 [2019-11-15 22:46:41,581 INFO L226 Difference]: Without dead ends: 1529 [2019-11-15 22:46:41,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:46:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2019-11-15 22:46:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1437. [2019-11-15 22:46:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1437 states. [2019-11-15 22:46:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1828 transitions. [2019-11-15 22:46:41,616 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1828 transitions. Word has length 49 [2019-11-15 22:46:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:41,616 INFO L462 AbstractCegarLoop]: Abstraction has 1437 states and 1828 transitions. [2019-11-15 22:46:41,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:46:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1828 transitions. [2019-11-15 22:46:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 22:46:41,618 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:41,619 INFO L380 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] [2019-11-15 22:46:41,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:46:41,822 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash 126573537, now seen corresponding path program 1 times [2019-11-15 22:46:41,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:46:41,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438187792] [2019-11-15 22:46:41,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:41,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:46:41,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:46:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:46:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:46:41,890 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 22:46:41,890 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 22:46:41,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:46:41 BoogieIcfgContainer [2019-11-15 22:46:41,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:46:41,923 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:46:41,923 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:46:41,924 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:46:41,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:46:24" (3/4) ... [2019-11-15 22:46:41,927 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-15 22:46:41,928 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:46:41,930 INFO L168 Benchmark]: Toolchain (without parser) took 18451.65 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 327.2 MB). Free memory was 951.4 MB in the beginning and 926.5 MB in the end (delta: 24.9 MB). Peak memory consumption was 352.1 MB. Max. memory is 11.5 GB. [2019-11-15 22:46:41,930 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:46:41,931 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -197.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-15 22:46:41,931 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.22 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:46:41,931 INFO L168 Benchmark]: Boogie Preprocessor took 30.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:46:41,932 INFO L168 Benchmark]: RCFGBuilder took 398.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-11-15 22:46:41,933 INFO L168 Benchmark]: TraceAbstraction took 17575.88 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 167.2 MB). Free memory was 1.1 GB in the beginning and 926.5 MB in the end (delta: 192.1 MB). Peak memory consumption was 359.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:46:41,933 INFO L168 Benchmark]: Witness Printer took 4.66 ms. Allocated memory is still 1.4 GB. Free memory is still 926.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:46:41,935 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 404.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -197.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.22 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 398.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17575.88 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 167.2 MB). Free memory was 1.1 GB in the beginning and 926.5 MB in the end (delta: 192.1 MB). Peak memory consumption was 359.4 MB. Max. memory is 11.5 GB. * Witness Printer took 4.66 ms. Allocated memory is still 1.4 GB. Free memory is still 926.5 MB. 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() [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 [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 [L49] nb = (unsigned char)4 [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND TRUE i < na [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 [L66] COND FALSE !(i == (unsigned char)1) [L67] COND FALSE !(i == (unsigned char)2) [L68] COND FALSE !(i == (unsigned char)3) [L70] COND TRUE i < nb [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 [L72] COND FALSE !(i == (unsigned char)1) [L73] COND FALSE !(i == (unsigned char)2) [L74] COND FALSE !(i == (unsigned char)3) [L76] COND FALSE !(partial_sum > ((unsigned char)254)) [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum [L81] COND FALSE !(i == (unsigned char)1) [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND TRUE i == (unsigned char)1 [L90] r1 = (unsigned char)0 [L91] COND FALSE !(i == (unsigned char)2) [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND FALSE !(i == (unsigned char)2) [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 [L94] i = i + (unsigned char)1 [L88] COND FALSE !(i < (unsigned char)4) [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; [L110] r = mp_add(a, b) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 1 error locations. Result: UNSAFE, OverallTime: 17.5s, OverallIterations: 18, TraceHistogramMax: 4, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1709 SDtfs, 2807 SDslu, 4079 SDs, 0 SdLazy, 5861 SolverSat, 432 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 9.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 336 SyntacticMatches, 15 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1442occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 1730 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 977 NumberOfCodeBlocks, 977 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 901 ConstructedInterpolants, 56 QuantifiedInterpolants, 219557 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1009 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 26 InterpolantComputations, 17 PerfectInterpolantSequences, 432/468 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-15 22:46:44,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:46:44,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:46:44,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:46:44,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:46:44,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:46:44,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:46:44,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:46:44,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:46:44,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:46:44,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:46:44,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:46:44,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:46:44,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:46:44,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:46:44,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:46:44,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:46:44,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:46:44,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:46:44,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:46:44,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:46:44,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:46:44,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:46:44,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:46:44,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:46:44,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:46:44,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:46:44,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:46:44,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:46:44,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:46:44,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:46:44,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:46:44,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:46:44,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:46:44,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:46:44,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:46:44,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:46:44,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:46:44,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:46:44,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:46:44,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:46:44,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 22:46:44,083 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:46:44,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:46:44,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:46:44,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:46:44,085 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:46:44,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:46:44,085 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:46:44,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:46:44,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:46:44,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:46:44,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:46:44,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:46:44,087 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 22:46:44,087 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 22:46:44,087 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:46:44,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:46:44,087 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:46:44,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:46:44,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:46:44,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:46:44,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:46:44,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:46:44,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:46:44,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:46:44,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:46:44,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:46:44,090 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 22:46:44,090 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 22:46:44,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:46:44,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 22:46:44,091 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2019-11-15 22:46:44,121 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:46:44,132 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:46:44,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:46:44,142 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:46:44,143 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:46:44,144 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-15 22:46:44,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/8cf2a7987/51eaf2c30ff44c818eee1c5d64c137e3/FLAG26c9685d4 [2019-11-15 22:46:44,612 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:46:44,614 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-15 22:46:44,625 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/8cf2a7987/51eaf2c30ff44c818eee1c5d64c137e3/FLAG26c9685d4 [2019-11-15 22:46:45,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/data/8cf2a7987/51eaf2c30ff44c818eee1c5d64c137e3 [2019-11-15 22:46:45,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:46:45,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:46:45,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:46:45,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:46:45,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:46:45,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dcc2b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45, skipping insertion in model container [2019-11-15 22:46:45,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,050 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:46:45,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:46:45,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:46:45,288 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:46:45,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:46:45,391 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:46:45,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45 WrapperNode [2019-11-15 22:46:45,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:46:45,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:46:45,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:46:45,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:46:45,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:46:45,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:46:45,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:46:45,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:46:45,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... [2019-11-15 22:46:45,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:46:45,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:46:45,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:46:45,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:46:45,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:46:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:46:45,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:46:45,955 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:46:45,955 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-15 22:46:45,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:46:45 BoogieIcfgContainer [2019-11-15 22:46:45,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:46:45,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:46:45,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:46:45,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:46:45,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:46:45" (1/3) ... [2019-11-15 22:46:45,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3328c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:46:45, skipping insertion in model container [2019-11-15 22:46:45,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:46:45" (2/3) ... [2019-11-15 22:46:45,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3328c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:46:45, skipping insertion in model container [2019-11-15 22:46:45,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:46:45" (3/3) ... [2019-11-15 22:46:45,964 INFO L109 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2019-11-15 22:46:45,982 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:46:45,990 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:46:46,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:46:46,037 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:46:46,037 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:46:46,037 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:46:46,037 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:46:46,038 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:46:46,038 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:46:46,038 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:46:46,038 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:46:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-15 22:46:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:46:46,056 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:46,057 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:46,058 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1818568748, now seen corresponding path program 1 times [2019-11-15 22:46:46,071 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:46,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2031182528] [2019-11-15 22:46:46,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:46,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-15 22:46:46,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:46,158 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:46,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2031182528] [2019-11-15 22:46:46,162 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:46,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-15 22:46:46,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311622359] [2019-11-15 22:46:46,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:46:46,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:46:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:46:46,178 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-11-15 22:46:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:46,193 INFO L93 Difference]: Finished difference Result 56 states and 91 transitions. [2019-11-15 22:46:46,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:46:46,194 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-15 22:46:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:46,202 INFO L225 Difference]: With dead ends: 56 [2019-11-15 22:46:46,203 INFO L226 Difference]: Without dead ends: 37 [2019-11-15 22:46:46,205 INFO L600 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 [2019-11-15 22:46:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-15 22:46:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-15 22:46:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-15 22:46:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2019-11-15 22:46:46,233 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 11 [2019-11-15 22:46:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:46,233 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2019-11-15 22:46:46,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:46:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2019-11-15 22:46:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:46:46,234 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:46,235 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:46,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:46,437 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash -927982706, now seen corresponding path program 1 times [2019-11-15 22:46:46,438 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:46,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2083013935] [2019-11-15 22:46:46,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:46,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:46:46,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:46,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:46,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2083013935] [2019-11-15 22:46:46,574 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:46,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 22:46:46,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406819401] [2019-11-15 22:46:46,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:46:46,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:46:46,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:46,580 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand 6 states. [2019-11-15 22:46:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:47,190 INFO L93 Difference]: Finished difference Result 171 states and 300 transitions. [2019-11-15 22:46:47,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:46:47,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-15 22:46:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:47,193 INFO L225 Difference]: With dead ends: 171 [2019-11-15 22:46:47,193 INFO L226 Difference]: Without dead ends: 143 [2019-11-15 22:46:47,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:46:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-15 22:46:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2019-11-15 22:46:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-15 22:46:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 182 transitions. [2019-11-15 22:46:47,211 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 182 transitions. Word has length 11 [2019-11-15 22:46:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:47,212 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 182 transitions. [2019-11-15 22:46:47,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:46:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 182 transitions. [2019-11-15 22:46:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-15 22:46:47,213 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:47,214 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:46:47,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:47,419 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:47,419 INFO L82 PathProgramCache]: Analyzing trace with hash 685151225, now seen corresponding path program 1 times [2019-11-15 22:46:47,419 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:47,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [70628948] [2019-11-15 22:46:47,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:47,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 22:46:47,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:47,555 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:47,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [70628948] [2019-11-15 22:46:47,650 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:47,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2019-11-15 22:46:47,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238476128] [2019-11-15 22:46:47,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 22:46:47,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 22:46:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:46:47,652 INFO L87 Difference]: Start difference. First operand 111 states and 182 transitions. Second operand 12 states. [2019-11-15 22:46:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:48,484 INFO L93 Difference]: Finished difference Result 272 states and 462 transitions. [2019-11-15 22:46:48,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:46:48,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2019-11-15 22:46:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:48,487 INFO L225 Difference]: With dead ends: 272 [2019-11-15 22:46:48,487 INFO L226 Difference]: Without dead ends: 227 [2019-11-15 22:46:48,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:46:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-11-15 22:46:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 183. [2019-11-15 22:46:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-11-15 22:46:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 291 transitions. [2019-11-15 22:46:48,505 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 291 transitions. Word has length 13 [2019-11-15 22:46:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:48,506 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 291 transitions. [2019-11-15 22:46:48,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 22:46:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 291 transitions. [2019-11-15 22:46:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 22:46:48,508 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:48,508 INFO L380 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] [2019-11-15 22:46:48,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:48,711 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:48,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1372883746, now seen corresponding path program 1 times [2019-11-15 22:46:48,712 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:48,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1508590732] [2019-11-15 22:46:48,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:48,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:46:48,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:48,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:48,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508590732] [2019-11-15 22:46:48,822 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:48,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 22:46:48,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18849902] [2019-11-15 22:46:48,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:46:48,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:46:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:46:48,823 INFO L87 Difference]: Start difference. First operand 183 states and 291 transitions. Second operand 4 states. [2019-11-15 22:46:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:48,981 INFO L93 Difference]: Finished difference Result 465 states and 755 transitions. [2019-11-15 22:46:48,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:46:48,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-15 22:46:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:48,984 INFO L225 Difference]: With dead ends: 465 [2019-11-15 22:46:48,984 INFO L226 Difference]: Without dead ends: 306 [2019-11-15 22:46:48,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:46:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-11-15 22:46:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 285. [2019-11-15 22:46:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-11-15 22:46:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 436 transitions. [2019-11-15 22:46:49,017 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 436 transitions. Word has length 25 [2019-11-15 22:46:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:49,017 INFO L462 AbstractCegarLoop]: Abstraction has 285 states and 436 transitions. [2019-11-15 22:46:49,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:46:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 436 transitions. [2019-11-15 22:46:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 22:46:49,024 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:49,024 INFO L380 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] [2019-11-15 22:46:49,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:49,235 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:49,237 INFO L82 PathProgramCache]: Analyzing trace with hash 918133982, now seen corresponding path program 1 times [2019-11-15 22:46:49,237 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:49,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1701917234] [2019-11-15 22:46:49,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:49,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:46:49,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:49,314 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:49,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701917234] [2019-11-15 22:46:49,331 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:49,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-15 22:46:49,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894595850] [2019-11-15 22:46:49,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:46:49,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:46:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:49,333 INFO L87 Difference]: Start difference. First operand 285 states and 436 transitions. Second operand 6 states. [2019-11-15 22:46:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:49,674 INFO L93 Difference]: Finished difference Result 1177 states and 1829 transitions. [2019-11-15 22:46:49,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:46:49,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-15 22:46:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:49,680 INFO L225 Difference]: With dead ends: 1177 [2019-11-15 22:46:49,680 INFO L226 Difference]: Without dead ends: 916 [2019-11-15 22:46:49,681 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:46:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2019-11-15 22:46:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 549. [2019-11-15 22:46:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2019-11-15 22:46:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 824 transitions. [2019-11-15 22:46:49,710 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 824 transitions. Word has length 25 [2019-11-15 22:46:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:49,711 INFO L462 AbstractCegarLoop]: Abstraction has 549 states and 824 transitions. [2019-11-15 22:46:49,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:46:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 824 transitions. [2019-11-15 22:46:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 22:46:49,713 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:49,713 INFO L380 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] [2019-11-15 22:46:49,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:49,919 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:49,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1619196567, now seen corresponding path program 1 times [2019-11-15 22:46:49,919 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:49,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [850580368] [2019-11-15 22:46:49,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:49,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 22:46:49,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:50,021 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:50,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850580368] [2019-11-15 22:46:50,103 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:46:50,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-15 22:46:50,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662517884] [2019-11-15 22:46:50,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 22:46:50,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:50,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 22:46:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:46:50,105 INFO L87 Difference]: Start difference. First operand 549 states and 824 transitions. Second operand 12 states. [2019-11-15 22:46:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:50,765 INFO L93 Difference]: Finished difference Result 1525 states and 2337 transitions. [2019-11-15 22:46:50,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:46:50,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-15 22:46:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:50,773 INFO L225 Difference]: With dead ends: 1525 [2019-11-15 22:46:50,773 INFO L226 Difference]: Without dead ends: 1264 [2019-11-15 22:46:50,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:46:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2019-11-15 22:46:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 961. [2019-11-15 22:46:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-11-15 22:46:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1440 transitions. [2019-11-15 22:46:50,809 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1440 transitions. Word has length 27 [2019-11-15 22:46:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:50,809 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1440 transitions. [2019-11-15 22:46:50,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 22:46:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1440 transitions. [2019-11-15 22:46:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-15 22:46:50,811 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:50,812 INFO L380 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] [2019-11-15 22:46:51,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:51,014 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:51,015 INFO L82 PathProgramCache]: Analyzing trace with hash -900742063, now seen corresponding path program 1 times [2019-11-15 22:46:51,015 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:51,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1232087785] [2019-11-15 22:46:51,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:51,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:46:51,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:51,134 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:51,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232087785] [2019-11-15 22:46:51,181 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:46:51,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-15 22:46:51,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562692168] [2019-11-15 22:46:51,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 22:46:51,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 22:46:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:46:51,182 INFO L87 Difference]: Start difference. First operand 961 states and 1440 transitions. Second operand 10 states. [2019-11-15 22:46:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:52,069 INFO L93 Difference]: Finished difference Result 2173 states and 3278 transitions. [2019-11-15 22:46:52,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 22:46:52,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-15 22:46:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:52,077 INFO L225 Difference]: With dead ends: 2173 [2019-11-15 22:46:52,078 INFO L226 Difference]: Without dead ends: 1463 [2019-11-15 22:46:52,079 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2019-11-15 22:46:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2019-11-15 22:46:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1163. [2019-11-15 22:46:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-11-15 22:46:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1713 transitions. [2019-11-15 22:46:52,128 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1713 transitions. Word has length 30 [2019-11-15 22:46:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:52,129 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1713 transitions. [2019-11-15 22:46:52,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 22:46:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1713 transitions. [2019-11-15 22:46:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 22:46:52,131 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:52,131 INFO L380 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] [2019-11-15 22:46:52,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:52,334 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash -342382578, now seen corresponding path program 1 times [2019-11-15 22:46:52,335 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:52,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [432848938] [2019-11-15 22:46:52,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:52,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:46:52,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:52,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:52,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [432848938] [2019-11-15 22:46:52,496 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:46:52,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-15 22:46:52,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511276102] [2019-11-15 22:46:52,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 22:46:52,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 22:46:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:46:52,497 INFO L87 Difference]: Start difference. First operand 1163 states and 1713 transitions. Second operand 10 states. [2019-11-15 22:46:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:53,407 INFO L93 Difference]: Finished difference Result 2526 states and 3720 transitions. [2019-11-15 22:46:53,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 22:46:53,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-11-15 22:46:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:53,416 INFO L225 Difference]: With dead ends: 2526 [2019-11-15 22:46:53,416 INFO L226 Difference]: Without dead ends: 1630 [2019-11-15 22:46:53,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2019-11-15 22:46:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2019-11-15 22:46:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1224. [2019-11-15 22:46:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1224 states. [2019-11-15 22:46:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1765 transitions. [2019-11-15 22:46:53,464 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1765 transitions. Word has length 31 [2019-11-15 22:46:53,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:53,466 INFO L462 AbstractCegarLoop]: Abstraction has 1224 states and 1765 transitions. [2019-11-15 22:46:53,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 22:46:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1765 transitions. [2019-11-15 22:46:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-15 22:46:53,469 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:53,469 INFO L380 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] [2019-11-15 22:46:53,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:53,672 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:53,673 INFO L82 PathProgramCache]: Analyzing trace with hash -610252502, now seen corresponding path program 1 times [2019-11-15 22:46:53,673 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:53,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1233793202] [2019-11-15 22:46:53,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:53,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:46:53,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:53,783 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:46:53,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233793202] [2019-11-15 22:46:53,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:46:53,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-15 22:46:53,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226176150] [2019-11-15 22:46:53,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:46:53,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:53,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:46:53,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:46:53,811 INFO L87 Difference]: Start difference. First operand 1224 states and 1765 transitions. Second operand 6 states. [2019-11-15 22:46:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:46:54,110 INFO L93 Difference]: Finished difference Result 2404 states and 3583 transitions. [2019-11-15 22:46:54,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:46:54,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-15 22:46:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:46:54,122 INFO L225 Difference]: With dead ends: 2404 [2019-11-15 22:46:54,122 INFO L226 Difference]: Without dead ends: 1778 [2019-11-15 22:46:54,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:46:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2019-11-15 22:46:54,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1367. [2019-11-15 22:46:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1367 states. [2019-11-15 22:46:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1983 transitions. [2019-11-15 22:46:54,170 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1983 transitions. Word has length 32 [2019-11-15 22:46:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:46:54,171 INFO L462 AbstractCegarLoop]: Abstraction has 1367 states and 1983 transitions. [2019-11-15 22:46:54,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:46:54,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1983 transitions. [2019-11-15 22:46:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 22:46:54,173 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:46:54,174 INFO L380 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] [2019-11-15 22:46:54,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:46:54,376 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:46:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:46:54,377 INFO L82 PathProgramCache]: Analyzing trace with hash 126573537, now seen corresponding path program 1 times [2019-11-15 22:46:54,378 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:46:54,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1830439267] [2019-11-15 22:46:54,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:46:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:46:54,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-15 22:46:54,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:46:55,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:46:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:46:55,600 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:46:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:46:57,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830439267] [2019-11-15 22:46:57,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:46:57,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2019-11-15 22:46:57,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496593269] [2019-11-15 22:46:57,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-15 22:46:57,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:46:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-15 22:46:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2019-11-15 22:46:57,736 INFO L87 Difference]: Start difference. First operand 1367 states and 1983 transitions. Second operand 38 states. [2019-11-15 22:47:06,564 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-11-15 22:47:11,939 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2019-11-15 22:47:17,457 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-11-15 22:47:17,788 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2019-11-15 22:47:18,260 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2019-11-15 22:47:19,419 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2019-11-15 22:47:20,249 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-11-15 22:47:20,516 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2019-11-15 22:47:20,897 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2019-11-15 22:47:21,230 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2019-11-15 22:47:21,796 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-11-15 22:47:22,771 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2019-11-15 22:47:24,317 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-15 22:47:25,151 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2019-11-15 22:47:26,255 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2019-11-15 22:47:26,556 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-11-15 22:47:27,310 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2019-11-15 22:47:27,597 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-11-15 22:47:27,863 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2019-11-15 22:47:28,165 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-11-15 22:47:28,479 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-15 22:47:28,943 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2019-11-15 22:47:29,489 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2019-11-15 22:47:29,814 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2019-11-15 22:47:30,842 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2019-11-15 22:47:31,195 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2019-11-15 22:47:32,108 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2019-11-15 22:47:33,487 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-11-15 22:47:33,897 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-15 22:47:36,622 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2019-11-15 22:47:36,980 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2019-11-15 22:47:37,301 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2019-11-15 22:47:37,682 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2019-11-15 22:47:38,933 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2019-11-15 22:47:39,558 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2019-11-15 22:47:41,493 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2019-11-15 22:47:41,896 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2019-11-15 22:47:42,337 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2019-11-15 22:47:43,436 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2019-11-15 22:47:44,193 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2019-11-15 22:47:44,559 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2019-11-15 22:47:44,889 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2019-11-15 22:47:45,231 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2019-11-15 22:47:46,031 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-11-15 22:47:46,390 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-11-15 22:47:47,247 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2019-11-15 22:47:47,682 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2019-11-15 22:47:48,052 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2019-11-15 22:47:48,465 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2019-11-15 22:47:49,032 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2019-11-15 22:47:49,562 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-11-15 22:47:50,191 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-15 22:47:50,910 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-11-15 22:47:51,398 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2019-11-15 22:47:51,779 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2019-11-15 22:47:52,274 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-11-15 22:47:53,258 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-15 22:47:53,701 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 99 [2019-11-15 22:47:54,157 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-11-15 22:47:54,663 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2019-11-15 22:47:54,979 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2019-11-15 22:47:55,865 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2019-11-15 22:47:56,064 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2019-11-15 22:47:56,511 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2019-11-15 22:47:56,907 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-11-15 22:47:57,298 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2019-11-15 22:47:57,819 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2019-11-15 22:47:58,338 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2019-11-15 22:47:59,027 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2019-11-15 22:47:59,490 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2019-11-15 22:48:00,168 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2019-11-15 22:48:00,526 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-11-15 22:48:01,053 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2019-11-15 22:48:01,523 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-11-15 22:48:02,267 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 113 [2019-11-15 22:48:02,724 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2019-11-15 22:48:03,522 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 102 [2019-11-15 22:48:04,074 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-11-15 22:48:04,933 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-15 22:48:05,320 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2019-11-15 22:48:05,682 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2019-11-15 22:48:05,998 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-15 22:48:06,645 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 115 [2019-11-15 22:48:06,892 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2019-11-15 22:48:07,611 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2019-11-15 22:48:07,828 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2019-11-15 22:48:08,265 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2019-11-15 22:48:08,733 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2019-11-15 22:48:09,196 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2019-11-15 22:48:09,607 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2019-11-15 22:48:10,486 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2019-11-15 22:48:10,922 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 119 [2019-11-15 22:48:11,337 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2019-11-15 22:48:11,874 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2019-11-15 22:48:12,415 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2019-11-15 22:48:13,058 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-15 22:48:13,627 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2019-11-15 22:48:13,962 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-15 22:48:14,587 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2019-11-15 22:48:15,048 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2019-11-15 22:48:15,429 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2019-11-15 22:48:16,211 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 111 [2019-11-15 22:48:16,615 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 100 [2019-11-15 22:48:17,073 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 [2019-11-15 22:48:17,753 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 118 [2019-11-15 22:48:18,146 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-11-15 22:48:18,474 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2019-11-15 22:48:18,903 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-15 22:48:19,485 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2019-11-15 22:48:19,820 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-15 22:48:20,337 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2019-11-15 22:48:20,666 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2019-11-15 22:48:21,260 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2019-11-15 22:48:21,847 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 103 [2019-11-15 22:48:22,299 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2019-11-15 22:48:22,775 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2019-11-15 22:48:23,349 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-11-15 22:48:23,865 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2019-11-15 22:48:24,367 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2019-11-15 22:48:25,344 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2019-11-15 22:48:25,793 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 111 [2019-11-15 22:48:26,260 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2019-11-15 22:48:26,744 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 115 [2019-11-15 22:48:27,261 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2019-11-15 22:48:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:48:27,304 INFO L93 Difference]: Finished difference Result 10750 states and 15411 transitions. [2019-11-15 22:48:27,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2019-11-15 22:48:27,304 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2019-11-15 22:48:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:48:27,353 INFO L225 Difference]: With dead ends: 10750 [2019-11-15 22:48:27,353 INFO L226 Difference]: Without dead ends: 10475 [2019-11-15 22:48:27,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34783 ImplicationChecksByTransitivity, 74.6s TimeCoverageRelationStatistics Valid=20899, Invalid=73043, Unknown=0, NotChecked=0, Total=93942 [2019-11-15 22:48:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10475 states. [2019-11-15 22:48:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10475 to 5617. [2019-11-15 22:48:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5617 states. [2019-11-15 22:48:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 8308 transitions. [2019-11-15 22:48:27,637 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 8308 transitions. Word has length 50 [2019-11-15 22:48:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:48:27,639 INFO L462 AbstractCegarLoop]: Abstraction has 5617 states and 8308 transitions. [2019-11-15 22:48:27,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-15 22:48:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 8308 transitions. [2019-11-15 22:48:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 22:48:27,643 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:48:27,643 INFO L380 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] [2019-11-15 22:48:27,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:48:27,846 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:48:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:48:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash -884543713, now seen corresponding path program 1 times [2019-11-15 22:48:27,847 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:48:27,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1954041845] [2019-11-15 22:48:27,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:48:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:27,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 22:48:27,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:48:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 22:48:28,001 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:48:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 22:48:28,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954041845] [2019-11-15 22:48:28,024 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:48:28,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-15 22:48:28,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465801339] [2019-11-15 22:48:28,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:48:28,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:48:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:48:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:48:28,025 INFO L87 Difference]: Start difference. First operand 5617 states and 8308 transitions. Second operand 8 states. [2019-11-15 22:48:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:48:28,888 INFO L93 Difference]: Finished difference Result 11601 states and 17096 transitions. [2019-11-15 22:48:28,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 22:48:28,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2019-11-15 22:48:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:48:28,916 INFO L225 Difference]: With dead ends: 11601 [2019-11-15 22:48:28,917 INFO L226 Difference]: Without dead ends: 5977 [2019-11-15 22:48:28,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:48:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2019-11-15 22:48:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5118. [2019-11-15 22:48:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5118 states. [2019-11-15 22:48:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5118 states to 5118 states and 7198 transitions. [2019-11-15 22:48:29,083 INFO L78 Accepts]: Start accepts. Automaton has 5118 states and 7198 transitions. Word has length 50 [2019-11-15 22:48:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:48:29,083 INFO L462 AbstractCegarLoop]: Abstraction has 5118 states and 7198 transitions. [2019-11-15 22:48:29,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:48:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5118 states and 7198 transitions. [2019-11-15 22:48:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 22:48:29,085 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:48:29,086 INFO L380 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] [2019-11-15 22:48:29,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:48:29,288 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:48:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:48:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash 103941283, now seen corresponding path program 1 times [2019-11-15 22:48:29,288 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:48:29,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [97721312] [2019-11-15 22:48:29,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:48:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:29,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 22:48:29,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:48:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-15 22:48:29,374 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:48:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-15 22:48:29,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97721312] [2019-11-15 22:48:29,380 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:48:29,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 22:48:29,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619269039] [2019-11-15 22:48:29,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:48:29,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:48:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:48:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:48:29,381 INFO L87 Difference]: Start difference. First operand 5118 states and 7198 transitions. Second operand 4 states. [2019-11-15 22:48:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:48:29,459 INFO L93 Difference]: Finished difference Result 5997 states and 8294 transitions. [2019-11-15 22:48:29,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:48:29,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-15 22:48:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:48:29,478 INFO L225 Difference]: With dead ends: 5997 [2019-11-15 22:48:29,479 INFO L226 Difference]: Without dead ends: 5942 [2019-11-15 22:48:29,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:48:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-11-15 22:48:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5401. [2019-11-15 22:48:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5401 states. [2019-11-15 22:48:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 7566 transitions. [2019-11-15 22:48:29,636 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 7566 transitions. Word has length 50 [2019-11-15 22:48:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:48:29,636 INFO L462 AbstractCegarLoop]: Abstraction has 5401 states and 7566 transitions. [2019-11-15 22:48:29,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:48:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 7566 transitions. [2019-11-15 22:48:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-15 22:48:29,639 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:48:29,639 INFO L380 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] [2019-11-15 22:48:29,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:48:29,849 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:48:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:48:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash 928939180, now seen corresponding path program 1 times [2019-11-15 22:48:29,850 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:48:29,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1083674878] [2019-11-15 22:48:29,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/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 [2019-11-15 22:48:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:48:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:48:30,059 INFO L168 tionRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-15 22:48:30,059 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 22:48:30,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:48:30,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:48:30 BoogieIcfgContainer [2019-11-15 22:48:30,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:48:30,325 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:48:30,325 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:48:30,325 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:48:30,326 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:46:45" (3/4) ... [2019-11-15 22:48:30,328 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 22:48:30,421 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_62641625-5169-4929-89f7-944a73cc1dd8/bin/uautomizer/witness.graphml [2019-11-15 22:48:30,421 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:48:30,423 INFO L168 Benchmark]: Toolchain (without parser) took 105390.62 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 498.6 MB). Free memory was 945.6 MB in the beginning and 863.9 MB in the end (delta: 81.7 MB). Peak memory consumption was 580.3 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:30,423 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:48:30,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -200.4 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:30,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:48:30,424 INFO L168 Benchmark]: Boogie Preprocessor took 30.46 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:48:30,424 INFO L168 Benchmark]: RCFGBuilder took 494.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:30,425 INFO L168 Benchmark]: TraceAbstraction took 104367.15 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 341.8 MB). Free memory was 1.1 GB in the beginning and 863.9 MB in the end (delta: 256.8 MB). Peak memory consumption was 598.6 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:30,425 INFO L168 Benchmark]: Witness Printer took 96.13 ms. Allocated memory is still 1.5 GB. Free memory is still 863.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:48:30,427 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 357.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -200.4 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.46 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 494.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 104367.15 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 341.8 MB). Free memory was 1.1 GB in the beginning and 863.9 MB in the end (delta: 256.8 MB). Peak memory consumption was 598.6 MB. Max. memory is 11.5 GB. * Witness Printer took 96.13 ms. Allocated memory is still 1.5 GB. Free memory is still 863.9 MB. There was no memory consumed. 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() [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 [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 [L49] nb = (unsigned char)4 [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND TRUE i < na [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 [L66] COND FALSE !(i == (unsigned char)1) [L67] COND FALSE !(i == (unsigned char)2) [L68] COND FALSE !(i == (unsigned char)3) [L70] COND TRUE i < nb [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 [L72] COND FALSE !(i == (unsigned char)1) [L73] COND FALSE !(i == (unsigned char)2) [L74] COND FALSE !(i == (unsigned char)3) [L76] COND TRUE partial_sum > ((unsigned char)254) [L77] partial_sum = partial_sum & ((unsigned char)255) [L78] carry = (unsigned short)1 [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum [L81] COND FALSE !(i == (unsigned char)1) [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND FALSE !(i < na) [L70] COND FALSE !(i < nb) [L76] COND FALSE !(partial_sum > ((unsigned char)254)) [L80] COND FALSE !(i == (unsigned char)0) [L81] COND TRUE i == (unsigned char)1 [L81] r1 = (unsigned char)partial_sum [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND FALSE !(i == (unsigned char)2) [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 [L94] i = i + (unsigned char)1 [L88] COND FALSE !(i < (unsigned char)4) [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; [L110] r = mp_add(a, b) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 1 error locations. Result: UNSAFE, OverallTime: 104.2s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 95.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1042 SDtfs, 7334 SDslu, 7200 SDs, 0 SdLazy, 15319 SolverSat, 1137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 991 GetRequests, 587 SyntacticMatches, 5 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34988 ImplicationChecksByTransitivity, 75.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5617occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 12 MinimizatonAttempts, 8142 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 408 NumberOfCodeBlocks, 408 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 686 ConstructedInterpolants, 0 QuantifiedInterpolants, 263687 SizeOfPredicates, 42 NumberOfNonLiveVariables, 712 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 24 InterpolantComputations, 14 PerfectInterpolantSequences, 107/144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...