./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --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_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 dc393f6c4862d8369d85fc8f5aceb831c4046350 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 dc393f6c4862d8369d85fc8f5aceb831c4046350 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:56:24,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:56:24,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:56:24,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:56:24,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:56:24,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:56:24,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:56:24,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:56:24,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:56:24,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:56:24,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:56:24,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:56:24,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:56:24,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:56:24,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:56:24,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:56:24,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:56:24,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:56:24,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:56:24,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:56:24,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:56:24,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:56:24,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:56:24,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:56:24,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:56:24,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:56:24,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:56:24,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:56:24,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:56:24,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:56:24,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:56:24,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:56:24,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:56:24,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:56:24,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:56:24,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:56:24,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:56:24,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:56:24,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:56:24,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:56:24,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:56:24,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:56:24,459 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:56:24,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:56:24,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:56:24,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:56:24,461 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:56:24,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:56:24,461 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:56:24,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:56:24,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:56:24,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:56:24,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:56:24,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:56:24,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:56:24,463 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:56:24,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:56:24,463 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:56:24,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:56:24,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:56:24,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:56:24,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:56:24,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:56:24,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:56:24,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:56:24,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:56:24,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:56:24,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:56:24,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:56:24,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:56:24,466 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_e46138ed-f2f1-4093-9858-401814601236/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 -> dc393f6c4862d8369d85fc8f5aceb831c4046350 [2019-11-15 23:56:24,491 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:56:24,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:56:24,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:56:24,511 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:56:24,512 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:56:24,512 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2019-11-15 23:56:24,573 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/f0e304f70/eb0c2d78dffb44d1be21bd48a49e364a/FLAG9f68c39b1 [2019-11-15 23:56:24,925 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:56:24,927 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/sv-benchmarks/c/bitvector/num_conversion_1.c [2019-11-15 23:56:24,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/f0e304f70/eb0c2d78dffb44d1be21bd48a49e364a/FLAG9f68c39b1 [2019-11-15 23:56:25,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/f0e304f70/eb0c2d78dffb44d1be21bd48a49e364a [2019-11-15 23:56:25,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:56:25,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:56:25,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:56:25,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:56:25,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:56:25,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7994c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25, skipping insertion in model container [2019-11-15 23:56:25,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,326 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:56:25,340 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:56:25,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:56:25,505 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:56:25,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:56:25,619 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:56:25,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25 WrapperNode [2019-11-15 23:56:25,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:56:25,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:56:25,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:56:25,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:56:25,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:56:25,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:56:25,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:56:25,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:56:25,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... [2019-11-15 23:56:25,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:56:25,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:56:25,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:56:25,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:56:25,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:25,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:56:25,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:56:25,885 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:56:25,886 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-15 23:56:25,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:56:25 BoogieIcfgContainer [2019-11-15 23:56:25,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:56:25,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:56:25,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:56:25,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:56:25,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:56:25" (1/3) ... [2019-11-15 23:56:25,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a19bcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:56:25, skipping insertion in model container [2019-11-15 23:56:25,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:25" (2/3) ... [2019-11-15 23:56:25,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a19bcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:56:25, skipping insertion in model container [2019-11-15 23:56:25,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:56:25" (3/3) ... [2019-11-15 23:56:25,894 INFO L109 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2019-11-15 23:56:25,903 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:56:25,909 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:56:25,917 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:56:25,934 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:56:25,935 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:56:25,935 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:56:25,935 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:56:25,936 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:56:25,936 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:56:25,936 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:56:25,936 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:56:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-15 23:56:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 23:56:25,955 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:25,955 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 23:56:25,957 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:25,962 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-11-15 23:56:25,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:25,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974907888] [2019-11-15 23:56:25,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:25,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:25,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:26,064 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 23:56:26,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974907888] [2019-11-15 23:56:26,066 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:56:26,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:56:26,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804137526] [2019-11-15 23:56:26,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 23:56:26,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 23:56:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:56:26,085 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-15 23:56:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:26,100 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-11-15 23:56:26,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 23:56:26,102 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-15 23:56:26,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:26,110 INFO L225 Difference]: With dead ends: 20 [2019-11-15 23:56:26,111 INFO L226 Difference]: Without dead ends: 8 [2019-11-15 23:56:26,113 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 23:56:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-15 23:56:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-15 23:56:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-15 23:56:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-15 23:56:26,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-15 23:56:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:26,142 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-15 23:56:26,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 23:56:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-15 23:56:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 23:56:26,143 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:26,143 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 23:56:26,143 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-11-15 23:56:26,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:26,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644032844] [2019-11-15 23:56:26,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:26,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:26,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:26,359 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-11-15 23:56:26,360 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 23:56:26,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644032844] [2019-11-15 23:56:26,360 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:56:26,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:56:26,361 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471727747] [2019-11-15 23:56:26,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:56:26,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:56:26,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:56:26,363 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2019-11-15 23:56:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:26,394 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-11-15 23:56:26,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:56:26,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-15 23:56:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:26,395 INFO L225 Difference]: With dead ends: 15 [2019-11-15 23:56:26,396 INFO L226 Difference]: Without dead ends: 11 [2019-11-15 23:56:26,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:56:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-15 23:56:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2019-11-15 23:56:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-15 23:56:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-15 23:56:26,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-11-15 23:56:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:26,399 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-15 23:56:26,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:56:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-15 23:56:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-15 23:56:26,400 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:26,400 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:56:26,400 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 608596189, now seen corresponding path program 1 times [2019-11-15 23:56:26,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:26,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544917856] [2019-11-15 23:56:26,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:26,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:26,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:26,482 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 23:56:26,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544917856] [2019-11-15 23:56:26,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544638994] [2019-11-15 23:56:26,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:26,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:56:26,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:26,584 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 23:56:26,585 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:26,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-11-15 23:56:26,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246315194] [2019-11-15 23:56:26,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:56:26,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:56:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:56:26,587 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2019-11-15 23:56:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:26,614 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-15 23:56:26,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:56:26,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-15 23:56:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:26,616 INFO L225 Difference]: With dead ends: 18 [2019-11-15 23:56:26,616 INFO L226 Difference]: Without dead ends: 14 [2019-11-15 23:56:26,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:56:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-15 23:56:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2019-11-15 23:56:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-15 23:56:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-15 23:56:26,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2019-11-15 23:56:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:26,620 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-15 23:56:26,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:56:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-15 23:56:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 23:56:26,621 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:26,621 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2019-11-15 23:56:26,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:56:26,822 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1123862993, now seen corresponding path program 2 times [2019-11-15 23:56:26,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:26,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767316528] [2019-11-15 23:56:26,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:26,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:26,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:26,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767316528] [2019-11-15 23:56:26,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272673103] [2019-11-15 23:56:26,912 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:26,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:56:26,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:26,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 23:56:26,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:26,994 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:26,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-15 23:56:26,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130718563] [2019-11-15 23:56:26,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:56:26,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:26,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:56:26,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:56:26,996 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2019-11-15 23:56:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:27,050 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-11-15 23:56:27,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:56:27,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-11-15 23:56:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:27,051 INFO L225 Difference]: With dead ends: 21 [2019-11-15 23:56:27,052 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 23:56:27,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:56:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 23:56:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-15 23:56:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-15 23:56:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-15 23:56:27,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2019-11-15 23:56:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:27,056 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-15 23:56:27,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:56:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-15 23:56:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 23:56:27,057 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:27,057 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-11-15 23:56:27,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:56:27,257 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash -193357923, now seen corresponding path program 3 times [2019-11-15 23:56:27,258 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:27,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644257294] [2019-11-15 23:56:27,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:27,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:27,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:27,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644257294] [2019-11-15 23:56:27,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416759914] [2019-11-15 23:56:27,348 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:27,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 23:56:27,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:27,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:56:27,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:27,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:27,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-15 23:56:27,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060502162] [2019-11-15 23:56:27,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 23:56:27,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:27,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 23:56:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:56:27,472 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 9 states. [2019-11-15 23:56:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:27,549 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2019-11-15 23:56:27,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:56:27,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-15 23:56:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:27,550 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:56:27,550 INFO L226 Difference]: Without dead ends: 20 [2019-11-15 23:56:27,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:56:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-15 23:56:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-15 23:56:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-15 23:56:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-15 23:56:27,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 14 [2019-11-15 23:56:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:27,556 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-15 23:56:27,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 23:56:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-15 23:56:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 23:56:27,557 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:27,557 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2019-11-15 23:56:27,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:56:27,758 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:27,758 INFO L82 PathProgramCache]: Analyzing trace with hash 764254063, now seen corresponding path program 4 times [2019-11-15 23:56:27,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:27,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864726745] [2019-11-15 23:56:27,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:27,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:27,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:27,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864726745] [2019-11-15 23:56:27,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218968249] [2019-11-15 23:56:27,862 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:27,905 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:56:27,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:27,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 23:56:27,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:28,024 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:28,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-15 23:56:28,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86800880] [2019-11-15 23:56:28,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:56:28,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:56:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:56:28,025 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 11 states. [2019-11-15 23:56:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:28,130 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2019-11-15 23:56:28,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:56:28,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-11-15 23:56:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:28,131 INFO L225 Difference]: With dead ends: 27 [2019-11-15 23:56:28,131 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 23:56:28,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:56:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 23:56:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-11-15 23:56:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-15 23:56:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-11-15 23:56:28,136 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 17 [2019-11-15 23:56:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:28,136 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-11-15 23:56:28,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:56:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-11-15 23:56:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-15 23:56:28,137 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:28,137 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1] [2019-11-15 23:56:28,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:56:28,338 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1810148957, now seen corresponding path program 5 times [2019-11-15 23:56:28,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:28,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128204885] [2019-11-15 23:56:28,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:28,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:28,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:28,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128204885] [2019-11-15 23:56:28,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80315224] [2019-11-15 23:56:28,495 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:28,547 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 23:56:28,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:28,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 23:56:28,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:28,694 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:28,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-15 23:56:28,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977463041] [2019-11-15 23:56:28,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:56:28,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:56:28,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:56:28,696 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 13 states. [2019-11-15 23:56:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:28,826 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2019-11-15 23:56:28,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:56:28,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-11-15 23:56:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:28,827 INFO L225 Difference]: With dead ends: 30 [2019-11-15 23:56:28,827 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 23:56:28,828 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:56:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 23:56:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-15 23:56:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 23:56:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-15 23:56:28,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 20 [2019-11-15 23:56:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:28,834 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-15 23:56:28,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:56:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-15 23:56:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:56:28,835 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:28,835 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2019-11-15 23:56:29,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:56:29,041 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash 77203631, now seen corresponding path program 6 times [2019-11-15 23:56:29,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:29,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570949868] [2019-11-15 23:56:29,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:29,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:29,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:29,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570949868] [2019-11-15 23:56:29,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617935426] [2019-11-15 23:56:29,210 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:29,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-15 23:56:29,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:29,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-15 23:56:29,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:29,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:29,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-15 23:56:29,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121496607] [2019-11-15 23:56:29,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 23:56:29,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 23:56:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:56:29,534 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 15 states. [2019-11-15 23:56:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:29,691 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-15 23:56:29,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:56:29,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-11-15 23:56:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:29,693 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:56:29,693 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 23:56:29,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:56:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 23:56:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-15 23:56:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-15 23:56:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2019-11-15 23:56:29,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 23 [2019-11-15 23:56:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:29,699 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2019-11-15 23:56:29,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 23:56:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2019-11-15 23:56:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 23:56:29,700 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:29,700 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1] [2019-11-15 23:56:29,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:56:29,901 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:29,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:29,902 INFO L82 PathProgramCache]: Analyzing trace with hash -590105315, now seen corresponding path program 7 times [2019-11-15 23:56:29,902 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:29,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161272184] [2019-11-15 23:56:29,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:29,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:29,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:30,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161272184] [2019-11-15 23:56:30,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426594304] [2019-11-15 23:56:30,065 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:30,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-15 23:56:30,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:30,334 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:30,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-15 23:56:30,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864859327] [2019-11-15 23:56:30,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-15 23:56:30,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:56:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-15 23:56:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:56:30,336 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 17 states. [2019-11-15 23:56:30,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:30,551 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2019-11-15 23:56:30,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 23:56:30,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2019-11-15 23:56:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:30,553 INFO L225 Difference]: With dead ends: 36 [2019-11-15 23:56:30,554 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 23:56:30,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:56:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 23:56:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-15 23:56:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 23:56:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-15 23:56:30,559 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 26 [2019-11-15 23:56:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:30,559 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-15 23:56:30,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-15 23:56:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-15 23:56:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 23:56:30,560 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:30,560 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1] [2019-11-15 23:56:30,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:56:30,766 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:30,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1012697583, now seen corresponding path program 8 times [2019-11-15 23:56:30,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:56:30,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934726958] [2019-11-15 23:56:30,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:30,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:56:30,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:56:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:56:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:56:30,812 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:56:30,813 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 23:56:30,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:56:30 BoogieIcfgContainer [2019-11-15 23:56:30,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:56:30,832 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:56:30,832 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:56:30,832 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:56:30,833 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:56:25" (3/4) ... [2019-11-15 23:56:30,836 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-15 23:56:30,836 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:56:30,837 INFO L168 Benchmark]: Toolchain (without parser) took 5526.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.0 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -199.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:56:30,838 INFO L168 Benchmark]: CDTParser took 0.20 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 23:56:30,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -173.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:30,839 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.93 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 23:56:30,840 INFO L168 Benchmark]: Boogie Preprocessor took 24.86 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:30,840 INFO L168 Benchmark]: RCFGBuilder took 206.95 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: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:30,841 INFO L168 Benchmark]: TraceAbstraction took 4943.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -52.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:30,842 INFO L168 Benchmark]: Witness Printer took 4.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:30,845 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 308.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -173.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.93 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 24.86 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 206.95 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: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4943.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -52.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Witness Printer took 4.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. 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 shiftLeft at line 22, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L14] unsigned char x; [L15] unsigned char y; [L16] unsigned char c; [L18] x = 37 [L19] y = 0 [L20] c = 0 [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND FALSE !(c < (unsigned char)8) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.8s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 136 SDslu, 565 SDs, 0 SdLazy, 585 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 232 ConstructedInterpolants, 70 QuantifiedInterpolants, 54320 SizeOfPredicates, 7 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 0/392 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 23:56:33,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:56:33,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:56:33,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:56:33,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:56:33,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:56:33,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:56:33,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:56:33,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:56:33,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:56:33,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:56:33,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:56:33,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:56:33,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:56:33,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:56:33,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:56:33,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:56:33,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:56:33,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:56:33,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:56:33,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:56:33,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:56:33,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:56:33,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:56:33,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:56:33,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:56:33,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:56:33,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:56:33,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:56:33,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:56:33,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:56:33,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:56:33,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:56:33,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:56:33,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:56:33,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:56:33,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:56:33,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:56:33,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:56:33,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:56:33,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:56:33,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 23:56:33,074 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:56:33,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:56:33,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:56:33,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:56:33,076 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:56:33,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:56:33,076 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:56:33,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:56:33,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:56:33,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:56:33,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:56:33,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:56:33,077 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 23:56:33,078 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 23:56:33,078 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:56:33,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:56:33,078 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:56:33,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:56:33,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:56:33,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:56:33,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:56:33,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:56:33,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:56:33,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:56:33,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:56:33,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:56:33,081 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 23:56:33,081 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 23:56:33,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:56:33,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 23:56:33,082 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_e46138ed-f2f1-4093-9858-401814601236/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 -> dc393f6c4862d8369d85fc8f5aceb831c4046350 [2019-11-15 23:56:33,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:56:33,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:56:33,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:56:33,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:56:33,125 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:56:33,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2019-11-15 23:56:33,176 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/2ca4460f3/0fbf32b285224b109502ac8e0504b0f2/FLAG32e8956e2 [2019-11-15 23:56:33,533 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:56:33,533 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/sv-benchmarks/c/bitvector/num_conversion_1.c [2019-11-15 23:56:33,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/2ca4460f3/0fbf32b285224b109502ac8e0504b0f2/FLAG32e8956e2 [2019-11-15 23:56:33,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/data/2ca4460f3/0fbf32b285224b109502ac8e0504b0f2 [2019-11-15 23:56:33,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:56:33,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:56:33,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:56:33,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:56:33,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:56:33,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:56:33" (1/1) ... [2019-11-15 23:56:33,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f20dc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:33, skipping insertion in model container [2019-11-15 23:56:33,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:56:33" (1/1) ... [2019-11-15 23:56:33,946 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:56:33,963 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:56:34,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:56:34,094 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:56:34,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:56:34,123 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:56:34,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34 WrapperNode [2019-11-15 23:56:34,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:56:34,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:56:34,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:56:34,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:56:34,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:56:34,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:56:34,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:56:34,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:56:34,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... [2019-11-15 23:56:34,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:56:34,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:56:34,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:56:34,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:56:34,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:56:34,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:56:34,473 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:56:34,473 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-15 23:56:34,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:56:34 BoogieIcfgContainer [2019-11-15 23:56:34,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:56:34,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:56:34,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:56:34,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:56:34,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:56:33" (1/3) ... [2019-11-15 23:56:34,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1a9fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:56:34, skipping insertion in model container [2019-11-15 23:56:34,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:56:34" (2/3) ... [2019-11-15 23:56:34,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1a9fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:56:34, skipping insertion in model container [2019-11-15 23:56:34,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:56:34" (3/3) ... [2019-11-15 23:56:34,480 INFO L109 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2019-11-15 23:56:34,489 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:56:34,493 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:56:34,500 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:56:34,518 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:56:34,519 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:56:34,519 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:56:34,519 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:56:34,519 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:56:34,520 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:56:34,520 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:56:34,520 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:56:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-15 23:56:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 23:56:34,535 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:34,536 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 23:56:34,537 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-11-15 23:56:34,548 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:34,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [66103912] [2019-11-15 23:56:34,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:34,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-15 23:56:34,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:34,616 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 23:56:34,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:34,620 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 23:56:34,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [66103912] [2019-11-15 23:56:34,621 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:56:34,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-15 23:56:34,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010182718] [2019-11-15 23:56:34,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 23:56:34,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:34,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 23:56:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:56:34,640 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-15 23:56:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:34,657 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-11-15 23:56:34,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 23:56:34,658 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-15 23:56:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:34,665 INFO L225 Difference]: With dead ends: 20 [2019-11-15 23:56:34,666 INFO L226 Difference]: Without dead ends: 8 [2019-11-15 23:56:34,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 23:56:34,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-15 23:56:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-15 23:56:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-15 23:56:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-15 23:56:34,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-15 23:56:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:34,697 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-15 23:56:34,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 23:56:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-15 23:56:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 23:56:34,698 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:34,698 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 23:56:34,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:34,900 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:34,900 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-11-15 23:56:34,901 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:34,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [792675045] [2019-11-15 23:56:34,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:34,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:56:34,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:34,960 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 23:56:34,961 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:34,972 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 23:56:34,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792675045] [2019-11-15 23:56:34,972 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:56:34,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-15 23:56:34,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526722934] [2019-11-15 23:56:34,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:56:34,974 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:56:34,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:56:34,975 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-15 23:56:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:35,006 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-11-15 23:56:35,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:56:35,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-15 23:56:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:35,008 INFO L225 Difference]: With dead ends: 16 [2019-11-15 23:56:35,008 INFO L226 Difference]: Without dead ends: 12 [2019-11-15 23:56:35,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 23:56:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-15 23:56:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-15 23:56:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-15 23:56:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-15 23:56:35,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2019-11-15 23:56:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:35,013 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-15 23:56:35,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:56:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-15 23:56:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 23:56:35,014 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:35,014 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2019-11-15 23:56:35,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:35,217 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1123862993, now seen corresponding path program 1 times [2019-11-15 23:56:35,218 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:35,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [806498189] [2019-11-15 23:56:35,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:35,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:56:35,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:35,332 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:35,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806498189] [2019-11-15 23:56:35,392 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:35,392 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-15 23:56:35,392 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604138714] [2019-11-15 23:56:35,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:56:35,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:56:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:56:35,394 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2019-11-15 23:56:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:35,614 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-11-15 23:56:35,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 23:56:35,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-11-15 23:56:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:35,616 INFO L225 Difference]: With dead ends: 41 [2019-11-15 23:56:35,616 INFO L226 Difference]: Without dead ends: 34 [2019-11-15 23:56:35,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:56:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-15 23:56:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 19. [2019-11-15 23:56:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-15 23:56:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-15 23:56:35,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2019-11-15 23:56:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:35,624 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-15 23:56:35,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:56:35,625 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-15 23:56:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 23:56:35,625 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:35,626 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:56:35,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:35,828 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:35,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1066604691, now seen corresponding path program 1 times [2019-11-15 23:56:35,829 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:35,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1661489896] [2019-11-15 23:56:35,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:56:35,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:56:35,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:35,904 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:35,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1661489896] [2019-11-15 23:56:35,953 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:35,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2019-11-15 23:56:35,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74218564] [2019-11-15 23:56:35,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:56:35,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:56:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:56:35,954 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 8 states. [2019-11-15 23:56:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:36,063 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-11-15 23:56:36,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:56:36,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-15 23:56:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:36,064 INFO L225 Difference]: With dead ends: 28 [2019-11-15 23:56:36,064 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 23:56:36,065 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:56:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 23:56:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-15 23:56:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 23:56:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-15 23:56:36,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2019-11-15 23:56:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:36,072 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-15 23:56:36,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:56:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-15 23:56:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:56:36,074 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:36,074 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1] [2019-11-15 23:56:36,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:36,275 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1658775637, now seen corresponding path program 2 times [2019-11-15 23:56:36,276 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:36,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2071858859] [2019-11-15 23:56:36,277 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:36,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:56:36,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:36,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 23:56:36,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:56:36,423 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:56:36,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071858859] [2019-11-15 23:56:36,570 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:36,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-15 23:56:36,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518396692] [2019-11-15 23:56:36,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:56:36,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:56:36,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:56:36,572 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 13 states. [2019-11-15 23:56:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:37,257 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2019-11-15 23:56:37,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-15 23:56:37,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2019-11-15 23:56:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:37,259 INFO L225 Difference]: With dead ends: 75 [2019-11-15 23:56:37,260 INFO L226 Difference]: Without dead ends: 66 [2019-11-15 23:56:37,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2019-11-15 23:56:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-15 23:56:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2019-11-15 23:56:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-15 23:56:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-15 23:56:37,280 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 23 [2019-11-15 23:56:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:37,280 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-15 23:56:37,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:56:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-15 23:56:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:56:37,285 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:37,285 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1] [2019-11-15 23:56:37,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:37,496 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash -978717267, now seen corresponding path program 3 times [2019-11-15 23:56:37,496 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:37,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1597832063] [2019-11-15 23:56:37,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:37,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 23:56:37,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:37,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 23:56:37,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-15 23:56:37,612 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-15 23:56:37,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1597832063] [2019-11-15 23:56:37,748 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:37,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-15 23:56:37,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585048773] [2019-11-15 23:56:37,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:56:37,749 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:56:37,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:56:37,750 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 10 states. [2019-11-15 23:56:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:38,001 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-11-15 23:56:38,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:56:38,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-15 23:56:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:38,004 INFO L225 Difference]: With dead ends: 86 [2019-11-15 23:56:38,004 INFO L226 Difference]: Without dead ends: 52 [2019-11-15 23:56:38,005 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:56:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-15 23:56:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2019-11-15 23:56:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-15 23:56:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-11-15 23:56:38,018 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 23 [2019-11-15 23:56:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:38,018 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-11-15 23:56:38,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:56:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-11-15 23:56:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:56:38,019 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:38,020 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1] [2019-11-15 23:56:38,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:38,231 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash -921458965, now seen corresponding path program 4 times [2019-11-15 23:56:38,231 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:38,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1235949165] [2019-11-15 23:56:38,232 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:38,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:56:38,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:38,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:56:38,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:38,360 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:56:38,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235949165] [2019-11-15 23:56:38,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:38,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-15 23:56:38,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459464341] [2019-11-15 23:56:38,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 23:56:38,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:38,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 23:56:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:56:38,541 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 16 states. [2019-11-15 23:56:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:38,831 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2019-11-15 23:56:38,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 23:56:38,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-11-15 23:56:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:38,833 INFO L225 Difference]: With dead ends: 80 [2019-11-15 23:56:38,833 INFO L226 Difference]: Without dead ends: 42 [2019-11-15 23:56:38,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:56:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-15 23:56:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-15 23:56:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-15 23:56:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-15 23:56:38,842 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 23 [2019-11-15 23:56:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:38,842 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-15 23:56:38,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 23:56:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-15 23:56:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 23:56:38,843 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:56:38,844 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1] [2019-11-15 23:56:39,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:39,049 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:56:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:56:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1658007635, now seen corresponding path program 5 times [2019-11-15 23:56:39,050 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:56:39,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [789607235] [2019-11-15 23:56:39,050 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/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 23:56:39,112 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-15 23:56:39,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:56:39,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-15 23:56:39,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:56:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 23:56:39,463 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:56:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 23:56:40,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [789607235] [2019-11-15 23:56:40,461 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:56:40,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2019-11-15 23:56:40,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942702605] [2019-11-15 23:56:40,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-15 23:56:40,462 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:56:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-15 23:56:40,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 23:56:40,463 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 33 states. [2019-11-15 23:56:41,573 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 31 [2019-11-15 23:56:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:56:41,998 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-15 23:56:41,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-15 23:56:41,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 29 [2019-11-15 23:56:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:56:41,998 INFO L225 Difference]: With dead ends: 47 [2019-11-15 23:56:41,998 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 23:56:42,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2019-11-15 23:56:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 23:56:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 23:56:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 23:56:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 23:56:42,003 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-11-15 23:56:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:56:42,003 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 23:56:42,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-15 23:56:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 23:56:42,003 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 23:56:42,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:56:42,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 23:56:42,344 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 136 [2019-11-15 23:56:42,827 WARN L191 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 62 [2019-11-15 23:56:42,828 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 23:56:42,829 INFO L446 ceAbstractionStarter]: At program point L31(lines 12 32) the Hoare annotation is: true [2019-11-15 23:56:42,829 INFO L439 ceAbstractionStarter]: At program point L21-2(lines 21 28) the Hoare annotation is: (let ((.cse7 (= (_ bv0 32) ((_ zero_extend 24) ULTIMATE.start_main_~bit~0)))) (let ((.cse2 (not .cse7)) (.cse4 (= (_ bv1 8) ULTIMATE.start_main_~y~0)) (.cse3 (= ULTIMATE.start_main_~bit~0 (_ bv0 8))) (.cse1 (= (_ bv5 8) ULTIMATE.start_main_~y~0)) (.cse5 (= (_ bv37 8) ULTIMATE.start_main_~y~0)) (.cse0 (= (_ bv37 8) ULTIMATE.start_main_~x~0))) (or (and (= (_ bv0 8) ULTIMATE.start_main_~c~0) (= (_ bv0 8) ULTIMATE.start_main_~y~0) .cse0) (and .cse1 (and .cse0 (= (_ bv3 8) ULTIMATE.start_main_~c~0)) .cse2) (and .cse3 .cse1 .cse0 (= (_ bv5 8) ULTIMATE.start_main_~c~0)) (and .cse4 (= (_ bv1 8) ULTIMATE.start_main_~c~0) .cse0 .cse2) (let ((.cse6 ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ULTIMATE.start_main_~c~0) (_ bv1 32)))))) (and .cse5 .cse0 (not (bvslt .cse6 (_ bv8 32))) (= ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ULTIMATE.start_main_~y~0) ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse6 (_ bv1 32)))))))))) ((_ zero_extend 24) ULTIMATE.start_main_~x~0)) .cse7)) (and .cse4 .cse3 .cse0 (= (_ bv2 8) ULTIMATE.start_main_~c~0)) (and .cse3 .cse1 .cse0 (= (_ bv4 8) ULTIMATE.start_main_~c~0)) (and (= (bvadd ULTIMATE.start_main_~bit~0 (_ bv224 8)) (_ bv0 8)) .cse5 .cse0 (= (_ bv6 8) ULTIMATE.start_main_~c~0))))) [2019-11-15 23:56:42,829 INFO L443 ceAbstractionStarter]: For program point L21-3(lines 21 28) no Hoare annotation was computed. [2019-11-15 23:56:42,829 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-11-15 23:56:42,829 INFO L446 ceAbstractionStarter]: At program point L5-2(lines 4 9) the Hoare annotation is: true [2019-11-15 23:56:42,829 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-11-15 23:56:42,829 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 23:56:42,829 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 23:56:42,830 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-11-15 23:56:42,830 INFO L443 ceAbstractionStarter]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2019-11-15 23:56:42,830 INFO L443 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-11-15 23:56:42,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:56:42 BoogieIcfgContainer [2019-11-15 23:56:42,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:56:42,845 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:56:42,845 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:56:42,846 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:56:42,846 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:56:34" (3/4) ... [2019-11-15 23:56:42,849 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 23:56:42,858 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-15 23:56:42,858 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 23:56:42,900 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e46138ed-f2f1-4093-9858-401814601236/bin/uautomizer/witness.graphml [2019-11-15 23:56:42,900 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:56:42,902 INFO L168 Benchmark]: Toolchain (without parser) took 8970.26 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 287.3 MB). Free memory was 951.0 MB in the beginning and 1.3 GB in the end (delta: -312.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:56:42,902 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:56:42,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.76 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:42,903 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -205.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:42,904 INFO L168 Benchmark]: Boogie Preprocessor took 24.00 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:42,904 INFO L168 Benchmark]: RCFGBuilder took 220.18 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: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:42,905 INFO L168 Benchmark]: TraceAbstraction took 8370.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 135.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -139.3 MB). Peak memory consumption was 373.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:42,905 INFO L168 Benchmark]: Witness Printer took 55.02 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:56:42,908 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 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 191.76 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 104.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -205.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.00 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 220.18 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: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8370.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 135.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -139.3 MB). Peak memory consumption was 373.7 MB. Max. memory is 11.5 GB. * Witness Printer took 55.02 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((0bv8 == c && 0bv8 == y) && 37bv8 == x) || ((5bv8 == y && 37bv8 == x && 3bv8 == c) && !(0bv32 == ~zero_extendFrom8To32(bit)))) || (((bit == 0bv8 && 5bv8 == y) && 37bv8 == x) && 5bv8 == c)) || (((1bv8 == y && 1bv8 == c) && 37bv8 == x) && !(0bv32 == ~zero_extendFrom8To32(bit)))) || ((((37bv8 == y && 37bv8 == x) && !~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 8bv32)) && ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]))[7:0]) == ~zero_extendFrom8To32(x)) && 0bv32 == ~zero_extendFrom8To32(bit))) || (((1bv8 == y && bit == 0bv8) && 37bv8 == x) && 2bv8 == c)) || (((bit == 0bv8 && 5bv8 == y) && 37bv8 == x) && 4bv8 == c)) || (((~bvadd64(bit, 224bv8) == 0bv8 && 37bv8 == y) && 37bv8 == x) && 6bv8 == c) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: SAFE, OverallTime: 8.3s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, HoareTripleCheckerStatistics: 64 SDtfs, 317 SDslu, 211 SDs, 0 SdLazy, 777 SolverSat, 140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 283 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 49 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 19 NumberOfFragments, 140 HoareAnnotationTreeSize, 3 FomulaSimplifications, 518 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 641 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 130 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 244 ConstructedInterpolants, 17 QuantifiedInterpolants, 74076 SizeOfPredicates, 27 NumberOfNonLiveVariables, 224 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 158/510 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 correct! Received shutdown request...