./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:43:30,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:43:30,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:43:30,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:43:30,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:43:30,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:43:30,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:43:30,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:43:30,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:43:30,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:43:30,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:43:30,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:43:30,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:43:30,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:43:30,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:43:30,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:43:30,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:43:30,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:43:30,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:43:30,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:43:30,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:43:30,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:43:30,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:43:30,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:43:30,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:43:30,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:43:30,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:43:30,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:43:30,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:43:30,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:43:30,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:43:30,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:43:30,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:43:30,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:43:30,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:43:30,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:43:30,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:43:30,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:43:30,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:43:30,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:43:30,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:43:30,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:43:30,387 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:43:30,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:43:30,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:43:30,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:43:30,388 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:43:30,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:43:30,388 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:43:30,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:43:30,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:43:30,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:43:30,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:43:30,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:43:30,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:43:30,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:43:30,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:43:30,391 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_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2019-12-07 18:43:30,491 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:43:30,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:43:30,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:43:30,505 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:43:30,506 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:43:30,506 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2019-12-07 18:43:30,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/ce889ad1b/bb56609acdd6483897a1bc3752ef58d0/FLAGf89413404 [2019-12-07 18:43:30,953 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:43:30,953 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/sv-benchmarks/c/bitvector/byte_add-1.i [2019-12-07 18:43:30,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/ce889ad1b/bb56609acdd6483897a1bc3752ef58d0/FLAGf89413404 [2019-12-07 18:43:30,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/ce889ad1b/bb56609acdd6483897a1bc3752ef58d0 [2019-12-07 18:43:30,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:43:30,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:43:30,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:43:30,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:43:30,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:43:30,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:43:30" (1/1) ... [2019-12-07 18:43:30,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d8b65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:30, skipping insertion in model container [2019-12-07 18:43:30,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:43:30" (1/1) ... [2019-12-07 18:43:30,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:43:30,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:43:31,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:43:31,153 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:43:31,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:43:31,187 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:43:31,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31 WrapperNode [2019-12-07 18:43:31,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:43:31,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:43:31,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:43:31,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:43:31,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:43:31,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:43:31,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:43:31,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:43:31,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... [2019-12-07 18:43:31,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:43:31,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:43:31,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:43:31,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:43:31,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:43:31,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:43:31,452 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:43:31,453 INFO L287 CfgBuilder]: Removed 10 assume(true) statements. [2019-12-07 18:43:31,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:43:31 BoogieIcfgContainer [2019-12-07 18:43:31,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:43:31,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:43:31,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:43:31,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:43:31,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:43:30" (1/3) ... [2019-12-07 18:43:31,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ced199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:43:31, skipping insertion in model container [2019-12-07 18:43:31,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:31" (2/3) ... [2019-12-07 18:43:31,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ced199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:43:31, skipping insertion in model container [2019-12-07 18:43:31,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:43:31" (3/3) ... [2019-12-07 18:43:31,459 INFO L109 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2019-12-07 18:43:31,465 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:43:31,469 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:43:31,477 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:43:31,493 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:43:31,493 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:43:31,493 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:43:31,493 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:43:31,494 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:43:31,494 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:43:31,494 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:43:31,494 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:43:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-12-07 18:43:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:43:31,508 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:31,508 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:31,508 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1818568748, now seen corresponding path program 1 times [2019-12-07 18:43:31,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:31,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008585719] [2019-12-07 18:43:31,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:31,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008585719] [2019-12-07 18:43:31,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:31,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 18:43:31,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806801955] [2019-12-07 18:43:31,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 18:43:31,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 18:43:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 18:43:31,623 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-12-07 18:43:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:31,636 INFO L93 Difference]: Finished difference Result 56 states and 91 transitions. [2019-12-07 18:43:31,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 18:43:31,637 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-12-07 18:43:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:31,643 INFO L225 Difference]: With dead ends: 56 [2019-12-07 18:43:31,643 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 18:43:31,645 INFO L630 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 [2019-12-07 18:43:31,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 18:43:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-12-07 18:43:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 18:43:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2019-12-07 18:43:31,668 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 11 [2019-12-07 18:43:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:31,669 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2019-12-07 18:43:31,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 18:43:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2019-12-07 18:43:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:43:31,670 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:31,670 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:31,670 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:31,670 INFO L82 PathProgramCache]: Analyzing trace with hash -927982706, now seen corresponding path program 1 times [2019-12-07 18:43:31,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:31,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152956269] [2019-12-07 18:43:31,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:31,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152956269] [2019-12-07 18:43:31,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:31,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:43:31,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816572156] [2019-12-07 18:43:31,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:43:31,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:43:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:43:31,750 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand 3 states. [2019-12-07 18:43:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:31,857 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2019-12-07 18:43:31,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:43:31,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-07 18:43:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:31,859 INFO L225 Difference]: With dead ends: 88 [2019-12-07 18:43:31,859 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 18:43:31,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:43:31,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 18:43:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-12-07 18:43:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 18:43:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 88 transitions. [2019-12-07 18:43:31,868 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 88 transitions. Word has length 11 [2019-12-07 18:43:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:31,868 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 88 transitions. [2019-12-07 18:43:31,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:43:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 88 transitions. [2019-12-07 18:43:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 18:43:31,869 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:31,869 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:31,869 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2028683165, now seen corresponding path program 1 times [2019-12-07 18:43:31,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:31,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385101653] [2019-12-07 18:43:31,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:31,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385101653] [2019-12-07 18:43:31,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:31,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:43:31,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210421521] [2019-12-07 18:43:31,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:43:31,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:43:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:43:31,940 INFO L87 Difference]: Start difference. First operand 58 states and 88 transitions. Second operand 5 states. [2019-12-07 18:43:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:32,137 INFO L93 Difference]: Finished difference Result 151 states and 230 transitions. [2019-12-07 18:43:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:43:32,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-12-07 18:43:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:32,138 INFO L225 Difference]: With dead ends: 151 [2019-12-07 18:43:32,138 INFO L226 Difference]: Without dead ends: 108 [2019-12-07 18:43:32,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-07 18:43:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2019-12-07 18:43:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 18:43:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 98 transitions. [2019-12-07 18:43:32,145 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 98 transitions. Word has length 17 [2019-12-07 18:43:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:32,145 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 98 transitions. [2019-12-07 18:43:32,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:43:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 98 transitions. [2019-12-07 18:43:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 18:43:32,146 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:32,146 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:32,146 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1576590710, now seen corresponding path program 1 times [2019-12-07 18:43:32,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:32,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899243888] [2019-12-07 18:43:32,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:32,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899243888] [2019-12-07 18:43:32,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:32,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:43:32,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868263901] [2019-12-07 18:43:32,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:43:32,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:32,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:43:32,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:43:32,197 INFO L87 Difference]: Start difference. First operand 65 states and 98 transitions. Second operand 5 states. [2019-12-07 18:43:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:32,386 INFO L93 Difference]: Finished difference Result 152 states and 230 transitions. [2019-12-07 18:43:32,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:43:32,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-12-07 18:43:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:32,387 INFO L225 Difference]: With dead ends: 152 [2019-12-07 18:43:32,388 INFO L226 Difference]: Without dead ends: 114 [2019-12-07 18:43:32,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-07 18:43:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2019-12-07 18:43:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-07 18:43:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 110 transitions. [2019-12-07 18:43:32,395 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 110 transitions. Word has length 18 [2019-12-07 18:43:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:32,395 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 110 transitions. [2019-12-07 18:43:32,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:43:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 110 transitions. [2019-12-07 18:43:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 18:43:32,396 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:32,396 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:32,396 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:32,396 INFO L82 PathProgramCache]: Analyzing trace with hash 511533202, now seen corresponding path program 1 times [2019-12-07 18:43:32,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:32,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844462552] [2019-12-07 18:43:32,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:32,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844462552] [2019-12-07 18:43:32,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612773563] [2019-12-07 18:43:32,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:32,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:43:32,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:32,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:32,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-12-07 18:43:32,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976504818] [2019-12-07 18:43:32,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:43:32,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:43:32,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:32,517 INFO L87 Difference]: Start difference. First operand 76 states and 110 transitions. Second operand 4 states. [2019-12-07 18:43:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:32,665 INFO L93 Difference]: Finished difference Result 145 states and 236 transitions. [2019-12-07 18:43:32,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:43:32,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-12-07 18:43:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:32,666 INFO L225 Difference]: With dead ends: 145 [2019-12-07 18:43:32,666 INFO L226 Difference]: Without dead ends: 117 [2019-12-07 18:43:32,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-12-07 18:43:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2019-12-07 18:43:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-07 18:43:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2019-12-07 18:43:32,673 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 19 [2019-12-07 18:43:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:32,673 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2019-12-07 18:43:32,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:43:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2019-12-07 18:43:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 18:43:32,675 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:32,675 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:32,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:32,876 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash 817706659, now seen corresponding path program 1 times [2019-12-07 18:43:32,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:32,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050203762] [2019-12-07 18:43:32,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:32,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050203762] [2019-12-07 18:43:32,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232250139] [2019-12-07 18:43:32,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:32,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:43:32,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:43:33,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:33,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2019-12-07 18:43:33,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386387786] [2019-12-07 18:43:33,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:43:33,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:43:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:33,002 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 4 states. [2019-12-07 18:43:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:35,281 INFO L93 Difference]: Finished difference Result 211 states and 312 transitions. [2019-12-07 18:43:35,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:43:35,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-12-07 18:43:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:35,282 INFO L225 Difference]: With dead ends: 211 [2019-12-07 18:43:35,282 INFO L226 Difference]: Without dead ends: 144 [2019-12-07 18:43:35,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-07 18:43:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2019-12-07 18:43:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-07 18:43:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2019-12-07 18:43:35,289 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 25 [2019-12-07 18:43:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:35,289 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2019-12-07 18:43:35,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:43:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2019-12-07 18:43:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 18:43:35,290 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:35,290 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:35,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:35,492 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1454047176, now seen corresponding path program 1 times [2019-12-07 18:43:35,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:35,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351666906] [2019-12-07 18:43:35,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:35,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351666906] [2019-12-07 18:43:35,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218512579] [2019-12-07 18:43:35,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:35,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:43:35,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 18:43:35,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:35,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-12-07 18:43:35,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207906740] [2019-12-07 18:43:35,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:43:35,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:43:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:43:35,628 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand 4 states. [2019-12-07 18:43:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:35,838 INFO L93 Difference]: Finished difference Result 257 states and 364 transitions. [2019-12-07 18:43:35,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:43:35,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-12-07 18:43:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:35,840 INFO L225 Difference]: With dead ends: 257 [2019-12-07 18:43:35,840 INFO L226 Difference]: Without dead ends: 167 [2019-12-07 18:43:35,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:43:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-07 18:43:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2019-12-07 18:43:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-07 18:43:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2019-12-07 18:43:35,847 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 31 [2019-12-07 18:43:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:35,848 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2019-12-07 18:43:35,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:43:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2019-12-07 18:43:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 18:43:35,849 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:35,849 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:36,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:36,050 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:36,051 INFO L82 PathProgramCache]: Analyzing trace with hash 153643337, now seen corresponding path program 1 times [2019-12-07 18:43:36,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:36,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639292732] [2019-12-07 18:43:36,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-12-07 18:43:36,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639292732] [2019-12-07 18:43:36,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:36,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:43:36,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377839625] [2019-12-07 18:43:36,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:43:36,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:43:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:36,136 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 6 states. [2019-12-07 18:43:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:36,431 INFO L93 Difference]: Finished difference Result 515 states and 671 transitions. [2019-12-07 18:43:36,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:43:36,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-12-07 18:43:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:36,433 INFO L225 Difference]: With dead ends: 515 [2019-12-07 18:43:36,433 INFO L226 Difference]: Without dead ends: 399 [2019-12-07 18:43:36,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:43:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-12-07 18:43:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 145. [2019-12-07 18:43:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-07 18:43:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2019-12-07 18:43:36,439 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 37 [2019-12-07 18:43:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:36,439 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2019-12-07 18:43:36,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:43:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2019-12-07 18:43:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 18:43:36,440 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:36,440 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:36,441 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1738720613, now seen corresponding path program 1 times [2019-12-07 18:43:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:36,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200433036] [2019-12-07 18:43:36,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-12-07 18:43:36,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200433036] [2019-12-07 18:43:36,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:36,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 18:43:36,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735095665] [2019-12-07 18:43:36,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:43:36,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:43:36,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:36,486 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 6 states. [2019-12-07 18:43:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:36,779 INFO L93 Difference]: Finished difference Result 499 states and 651 transitions. [2019-12-07 18:43:36,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:43:36,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-12-07 18:43:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:36,781 INFO L225 Difference]: With dead ends: 499 [2019-12-07 18:43:36,781 INFO L226 Difference]: Without dead ends: 384 [2019-12-07 18:43:36,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:43:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2019-12-07 18:43:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 311. [2019-12-07 18:43:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-12-07 18:43:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 416 transitions. [2019-12-07 18:43:36,793 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 416 transitions. Word has length 38 [2019-12-07 18:43:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:36,794 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 416 transitions. [2019-12-07 18:43:36,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:43:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 416 transitions. [2019-12-07 18:43:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 18:43:36,795 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:36,795 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:36,795 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:36,796 INFO L82 PathProgramCache]: Analyzing trace with hash 114978384, now seen corresponding path program 1 times [2019-12-07 18:43:36,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:36,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733122655] [2019-12-07 18:43:36,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-12-07 18:43:36,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733122655] [2019-12-07 18:43:36,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:36,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 18:43:36,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421559638] [2019-12-07 18:43:36,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:43:36,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:36,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:43:36,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:43:36,866 INFO L87 Difference]: Start difference. First operand 311 states and 416 transitions. Second operand 8 states. [2019-12-07 18:43:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:37,544 INFO L93 Difference]: Finished difference Result 1638 states and 2235 transitions. [2019-12-07 18:43:37,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:43:37,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2019-12-07 18:43:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:37,550 INFO L225 Difference]: With dead ends: 1638 [2019-12-07 18:43:37,550 INFO L226 Difference]: Without dead ends: 1318 [2019-12-07 18:43:37,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:43:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2019-12-07 18:43:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 982. [2019-12-07 18:43:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2019-12-07 18:43:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1334 transitions. [2019-12-07 18:43:37,579 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1334 transitions. Word has length 39 [2019-12-07 18:43:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:37,579 INFO L462 AbstractCegarLoop]: Abstraction has 982 states and 1334 transitions. [2019-12-07 18:43:37,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:43:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1334 transitions. [2019-12-07 18:43:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 18:43:37,580 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:37,580 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:37,581 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:37,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1859362712, now seen corresponding path program 1 times [2019-12-07 18:43:37,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:37,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422357015] [2019-12-07 18:43:37,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 18:43:37,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422357015] [2019-12-07 18:43:37,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690902890] [2019-12-07 18:43:37,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:37,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 18:43:37,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 18:43:37,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:37,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-12-07 18:43:37,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367981526] [2019-12-07 18:43:37,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:43:37,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:37,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:43:37,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:43:37,732 INFO L87 Difference]: Start difference. First operand 982 states and 1334 transitions. Second operand 4 states. [2019-12-07 18:43:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:37,842 INFO L93 Difference]: Finished difference Result 1371 states and 1862 transitions. [2019-12-07 18:43:37,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:43:37,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-12-07 18:43:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:37,846 INFO L225 Difference]: With dead ends: 1371 [2019-12-07 18:43:37,846 INFO L226 Difference]: Without dead ends: 1020 [2019-12-07 18:43:37,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:43:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2019-12-07 18:43:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1012. [2019-12-07 18:43:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2019-12-07 18:43:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1351 transitions. [2019-12-07 18:43:37,871 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1351 transitions. Word has length 44 [2019-12-07 18:43:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:37,871 INFO L462 AbstractCegarLoop]: Abstraction has 1012 states and 1351 transitions. [2019-12-07 18:43:37,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:43:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1351 transitions. [2019-12-07 18:43:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 18:43:37,872 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:37,873 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:38,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:38,073 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1051976431, now seen corresponding path program 1 times [2019-12-07 18:43:38,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:38,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651355517] [2019-12-07 18:43:38,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 18:43:38,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651355517] [2019-12-07 18:43:38,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524896366] [2019-12-07 18:43:38,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:38,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 18:43:38,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-07 18:43:38,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:38,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2019-12-07 18:43:38,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336727483] [2019-12-07 18:43:38,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:43:38,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:43:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:43:38,308 INFO L87 Difference]: Start difference. First operand 1012 states and 1351 transitions. Second operand 10 states. [2019-12-07 18:43:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:38,814 INFO L93 Difference]: Finished difference Result 1346 states and 1773 transitions. [2019-12-07 18:43:38,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:43:38,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-12-07 18:43:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:38,819 INFO L225 Difference]: With dead ends: 1346 [2019-12-07 18:43:38,819 INFO L226 Difference]: Without dead ends: 1224 [2019-12-07 18:43:38,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:43:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2019-12-07 18:43:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1083. [2019-12-07 18:43:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1083 states. [2019-12-07 18:43:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1445 transitions. [2019-12-07 18:43:38,843 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1445 transitions. Word has length 45 [2019-12-07 18:43:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:38,844 INFO L462 AbstractCegarLoop]: Abstraction has 1083 states and 1445 transitions. [2019-12-07 18:43:38,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:43:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1445 transitions. [2019-12-07 18:43:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 18:43:38,845 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:38,845 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:39,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:39,046 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:39,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1397623699, now seen corresponding path program 1 times [2019-12-07 18:43:39,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:39,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987375512] [2019-12-07 18:43:39,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 18:43:39,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987375512] [2019-12-07 18:43:39,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873753359] [2019-12-07 18:43:39,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:39,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 18:43:39,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:43:39,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:39,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2019-12-07 18:43:39,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978080619] [2019-12-07 18:43:39,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:43:39,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:39,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:43:39,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:43:39,228 INFO L87 Difference]: Start difference. First operand 1083 states and 1445 transitions. Second operand 7 states. [2019-12-07 18:43:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:39,685 INFO L93 Difference]: Finished difference Result 2392 states and 3203 transitions. [2019-12-07 18:43:39,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:43:39,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-12-07 18:43:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:39,690 INFO L225 Difference]: With dead ends: 2392 [2019-12-07 18:43:39,690 INFO L226 Difference]: Without dead ends: 1311 [2019-12-07 18:43:39,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:43:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2019-12-07 18:43:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1133. [2019-12-07 18:43:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1133 states. [2019-12-07 18:43:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1469 transitions. [2019-12-07 18:43:39,713 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1469 transitions. Word has length 45 [2019-12-07 18:43:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:39,713 INFO L462 AbstractCegarLoop]: Abstraction has 1133 states and 1469 transitions. [2019-12-07 18:43:39,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:43:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1469 transitions. [2019-12-07 18:43:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-07 18:43:39,714 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:39,714 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:39,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:39,915 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash -718889683, now seen corresponding path program 1 times [2019-12-07 18:43:39,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:39,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096771666] [2019-12-07 18:43:39,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-07 18:43:39,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096771666] [2019-12-07 18:43:39,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:39,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-12-07 18:43:39,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648919529] [2019-12-07 18:43:39,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:43:39,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:39,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:43:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:43:39,996 INFO L87 Difference]: Start difference. First operand 1133 states and 1469 transitions. Second operand 9 states. [2019-12-07 18:43:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:40,612 INFO L93 Difference]: Finished difference Result 2417 states and 3169 transitions. [2019-12-07 18:43:40,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:43:40,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-12-07 18:43:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:40,617 INFO L225 Difference]: With dead ends: 2417 [2019-12-07 18:43:40,617 INFO L226 Difference]: Without dead ends: 1628 [2019-12-07 18:43:40,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:43:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2019-12-07 18:43:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1364. [2019-12-07 18:43:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1364 states. [2019-12-07 18:43:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1759 transitions. [2019-12-07 18:43:40,647 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1759 transitions. Word has length 46 [2019-12-07 18:43:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:40,647 INFO L462 AbstractCegarLoop]: Abstraction has 1364 states and 1759 transitions. [2019-12-07 18:43:40,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:43:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1759 transitions. [2019-12-07 18:43:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-07 18:43:40,648 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:40,648 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:40,649 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 190973292, now seen corresponding path program 1 times [2019-12-07 18:43:40,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:40,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892107133] [2019-12-07 18:43:40,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 18:43:40,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892107133] [2019-12-07 18:43:40,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127598284] [2019-12-07 18:43:40,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:40,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 18:43:40,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 18:43:40,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:40,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 8 [2019-12-07 18:43:40,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118591394] [2019-12-07 18:43:40,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:43:40,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:40,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:43:40,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:43:40,771 INFO L87 Difference]: Start difference. First operand 1364 states and 1759 transitions. Second operand 4 states. [2019-12-07 18:43:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:40,846 INFO L93 Difference]: Finished difference Result 1825 states and 2357 transitions. [2019-12-07 18:43:40,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:43:40,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-12-07 18:43:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:40,851 INFO L225 Difference]: With dead ends: 1825 [2019-12-07 18:43:40,851 INFO L226 Difference]: Without dead ends: 1407 [2019-12-07 18:43:40,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:43:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2019-12-07 18:43:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1371. [2019-12-07 18:43:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1371 states. [2019-12-07 18:43:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1754 transitions. [2019-12-07 18:43:40,872 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1754 transitions. Word has length 48 [2019-12-07 18:43:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:40,872 INFO L462 AbstractCegarLoop]: Abstraction has 1371 states and 1754 transitions. [2019-12-07 18:43:40,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:43:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1754 transitions. [2019-12-07 18:43:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 18:43:40,873 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:40,873 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:41,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:41,074 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash -628542036, now seen corresponding path program 1 times [2019-12-07 18:43:41,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:41,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161638484] [2019-12-07 18:43:41,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 18:43:41,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161638484] [2019-12-07 18:43:41,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992647963] [2019-12-07 18:43:41,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:41,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 18:43:41,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:43:41,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:41,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-12-07 18:43:41,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360732078] [2019-12-07 18:43:41,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 18:43:41,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:43:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:43:41,366 INFO L87 Difference]: Start difference. First operand 1371 states and 1754 transitions. Second operand 11 states. [2019-12-07 18:43:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:41,994 INFO L93 Difference]: Finished difference Result 2960 states and 3855 transitions. [2019-12-07 18:43:41,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 18:43:41,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2019-12-07 18:43:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:42,000 INFO L225 Difference]: With dead ends: 2960 [2019-12-07 18:43:42,000 INFO L226 Difference]: Without dead ends: 1645 [2019-12-07 18:43:42,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-12-07 18:43:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2019-12-07 18:43:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1442. [2019-12-07 18:43:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2019-12-07 18:43:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1844 transitions. [2019-12-07 18:43:42,029 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1844 transitions. Word has length 49 [2019-12-07 18:43:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:42,029 INFO L462 AbstractCegarLoop]: Abstraction has 1442 states and 1844 transitions. [2019-12-07 18:43:42,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 18:43:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1844 transitions. [2019-12-07 18:43:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 18:43:42,031 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:42,031 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:42,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:42,232 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1299730666, now seen corresponding path program 1 times [2019-12-07 18:43:42,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:42,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64200116] [2019-12-07 18:43:42,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 18:43:42,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64200116] [2019-12-07 18:43:42,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865406105] [2019-12-07 18:43:42,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:42,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 18:43:42,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:43:42,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:42,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2019-12-07 18:43:42,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285873098] [2019-12-07 18:43:42,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:43:42,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:43:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:43:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:43:42,418 INFO L87 Difference]: Start difference. First operand 1442 states and 1844 transitions. Second operand 6 states. [2019-12-07 18:43:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:42,707 INFO L93 Difference]: Finished difference Result 1771 states and 2254 transitions. [2019-12-07 18:43:42,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:43:42,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-12-07 18:43:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:42,712 INFO L225 Difference]: With dead ends: 1771 [2019-12-07 18:43:42,712 INFO L226 Difference]: Without dead ends: 1529 [2019-12-07 18:43:42,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:43:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2019-12-07 18:43:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1437. [2019-12-07 18:43:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1437 states. [2019-12-07 18:43:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1828 transitions. [2019-12-07 18:43:42,733 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1828 transitions. Word has length 49 [2019-12-07 18:43:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:42,733 INFO L462 AbstractCegarLoop]: Abstraction has 1437 states and 1828 transitions. [2019-12-07 18:43:42,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:43:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1828 transitions. [2019-12-07 18:43:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 18:43:42,734 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:42,735 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:42,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:43:42,935 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 126573537, now seen corresponding path program 1 times [2019-12-07 18:43:42,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:43:42,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440138403] [2019-12-07 18:43:42,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:43:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:43:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:43:42,970 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:43:42,970 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 18:43:42,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:43:42 BoogieIcfgContainer [2019-12-07 18:43:42,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:43:42,995 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:43:42,995 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:43:42,995 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:43:42,995 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:43:31" (3/4) ... [2019-12-07 18:43:42,998 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 18:43:42,998 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:43:42,999 INFO L168 Benchmark]: Toolchain (without parser) took 12029.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 942.0 MB in the beginning and 1.0 GB in the end (delta: -97.8 MB). Peak memory consumption was 60.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:43:43,000 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:43:43,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.4 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -137.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:43:43,000 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:43:43,000 INFO L168 Benchmark]: Boogie Preprocessor took 16.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:43:43,001 INFO L168 Benchmark]: RCFGBuilder took 221.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:43:43,001 INFO L168 Benchmark]: TraceAbstraction took 11540.36 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 11.9 MB). Peak memory consumption was 85.8 MB. Max. memory is 11.5 GB. [2019-12-07 18:43:43,001 INFO L168 Benchmark]: Witness Printer took 3.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:43:43,003 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 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 217.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.4 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -137.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 221.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11540.36 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 11.9 MB). Peak memory consumption was 85.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 97. Possible FailurePath: [L105] unsigned int a, b, r; [L107] a = __VERIFIER_nondet_uint() [L108] b = __VERIFIER_nondet_uint() [L23] unsigned char a0, a1, a2, a3; [L24] unsigned char b0, b1, b2, b3; [L25] unsigned char r0, r1, r2, r3; [L26] unsigned short carry; [L27] unsigned short partial_sum; [L28] unsigned int r; [L29] unsigned char i; [L30] unsigned char na, nb; [L31] a0 = a [L32] a1 = a >> 8 [L33] a2 = a >> 16U [L34] a3 = a >> 24U [L35] b0 = b [L36] b1 = b >> 8U [L37] b2 = b >> 16U [L38] b3 = b >> 24U [L39] na = (unsigned char)4 [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 [L49] nb = (unsigned char)4 [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND TRUE i < na [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 [L66] COND FALSE !(i == (unsigned char)1) [L67] COND FALSE !(i == (unsigned char)2) [L68] COND FALSE !(i == (unsigned char)3) [L70] COND TRUE i < nb [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 [L72] COND FALSE !(i == (unsigned char)1) [L73] COND FALSE !(i == (unsigned char)2) [L74] COND FALSE !(i == (unsigned char)3) [L76] COND FALSE !(partial_sum > ((unsigned char)254)) [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum [L81] COND FALSE !(i == (unsigned char)1) [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND TRUE i == (unsigned char)1 [L90] r1 = (unsigned char)0 [L91] COND FALSE !(i == (unsigned char)2) [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND FALSE !(i == (unsigned char)2) [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 [L94] i = i + (unsigned char)1 [L88] COND FALSE !(i < (unsigned char)4) [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; [L110] r = mp_add(a, b) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 1 error locations. Result: UNSAFE, OverallTime: 11.4s, OverallIterations: 18, TraceHistogramMax: 4, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1709 SDtfs, 2807 SDslu, 4079 SDs, 0 SdLazy, 5862 SolverSat, 432 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 336 SyntacticMatches, 15 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1442occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 1730 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 977 NumberOfCodeBlocks, 977 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 901 ConstructedInterpolants, 56 QuantifiedInterpolants, 219557 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1009 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 26 InterpolantComputations, 17 PerfectInterpolantSequences, 432/468 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 18:43:44,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:43:44,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:43:44,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:43:44,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:43:44,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:43:44,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:43:44,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:43:44,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:43:44,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:43:44,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:43:44,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:43:44,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:43:44,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:43:44,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:43:44,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:43:44,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:43:44,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:43:44,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:43:44,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:43:44,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:43:44,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:43:44,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:43:44,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:43:44,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:43:44,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:43:44,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:43:44,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:43:44,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:43:44,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:43:44,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:43:44,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:43:44,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:43:44,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:43:44,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:43:44,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:43:44,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:43:44,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:43:44,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:43:44,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:43:44,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:43:44,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 18:43:44,502 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:43:44,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:43:44,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:43:44,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:43:44,503 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:43:44,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:43:44,504 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:43:44,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:43:44,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:43:44,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:43:44,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:43:44,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:43:44,505 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 18:43:44,505 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 18:43:44,505 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:43:44,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:43:44,505 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:43:44,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:43:44,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:43:44,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:43:44,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:43:44,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:43:44,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:43:44,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:43:44,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:43:44,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:43:44,507 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 18:43:44,507 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 18:43:44,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:43:44,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:43:44,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 18:43:44,507 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_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2019-12-07 18:43:44,678 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:43:44,685 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:43:44,688 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:43:44,688 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:43:44,689 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:43:44,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2019-12-07 18:43:44,726 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/cdb6d7bfe/0150d90c3b37488585e6dc2da173d1d0/FLAGf267512fa [2019-12-07 18:43:45,137 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:43:45,138 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/sv-benchmarks/c/bitvector/byte_add-1.i [2019-12-07 18:43:45,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/cdb6d7bfe/0150d90c3b37488585e6dc2da173d1d0/FLAGf267512fa [2019-12-07 18:43:45,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/data/cdb6d7bfe/0150d90c3b37488585e6dc2da173d1d0 [2019-12-07 18:43:45,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:43:45,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:43:45,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:43:45,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:43:45,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:43:45,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c44b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45, skipping insertion in model container [2019-12-07 18:43:45,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:43:45,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:43:45,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:43:45,300 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:43:45,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:43:45,362 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:43:45,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45 WrapperNode [2019-12-07 18:43:45,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:43:45,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:43:45,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:43:45,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:43:45,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:43:45,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:43:45,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:43:45,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:43:45,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... [2019-12-07 18:43:45,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:43:45,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:43:45,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:43:45,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:43:45,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/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 [2019-12-07 18:43:45,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:43:45,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:43:45,657 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:43:45,657 INFO L287 CfgBuilder]: Removed 10 assume(true) statements. [2019-12-07 18:43:45,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:43:45 BoogieIcfgContainer [2019-12-07 18:43:45,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:43:45,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:43:45,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:43:45,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:43:45,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:43:45" (1/3) ... [2019-12-07 18:43:45,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cb226d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:43:45, skipping insertion in model container [2019-12-07 18:43:45,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:43:45" (2/3) ... [2019-12-07 18:43:45,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cb226d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:43:45, skipping insertion in model container [2019-12-07 18:43:45,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:43:45" (3/3) ... [2019-12-07 18:43:45,662 INFO L109 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2019-12-07 18:43:45,669 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:43:45,673 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:43:45,680 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:43:45,696 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:43:45,696 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:43:45,696 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:43:45,696 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:43:45,696 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:43:45,696 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:43:45,697 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:43:45,697 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:43:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-12-07 18:43:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:43:45,711 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:45,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:45,712 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:45,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1818568748, now seen corresponding path program 1 times [2019-12-07 18:43:45,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:45,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872248954] [2019-12-07 18:43:45,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:45,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 18:43:45,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:45,781 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:45,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872248954] [2019-12-07 18:43:45,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:45,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 18:43:45,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111859928] [2019-12-07 18:43:45,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 18:43:45,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 18:43:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 18:43:45,799 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-12-07 18:43:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:45,812 INFO L93 Difference]: Finished difference Result 56 states and 91 transitions. [2019-12-07 18:43:45,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 18:43:45,813 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-12-07 18:43:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:45,820 INFO L225 Difference]: With dead ends: 56 [2019-12-07 18:43:45,821 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 18:43:45,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 18:43:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 18:43:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-12-07 18:43:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 18:43:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2019-12-07 18:43:45,850 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 11 [2019-12-07 18:43:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:45,850 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2019-12-07 18:43:45,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 18:43:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2019-12-07 18:43:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:43:45,851 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:45,851 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:46,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 18:43:46,053 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:46,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash -927982706, now seen corresponding path program 1 times [2019-12-07 18:43:46,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:46,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370541444] [2019-12-07 18:43:46,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:46,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 18:43:46,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:46,142 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:46,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370541444] [2019-12-07 18:43:46,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:46,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 18:43:46,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478119570] [2019-12-07 18:43:46,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:43:46,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:46,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:43:46,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:46,155 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand 6 states. [2019-12-07 18:43:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:46,502 INFO L93 Difference]: Finished difference Result 171 states and 300 transitions. [2019-12-07 18:43:46,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:43:46,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-07 18:43:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:46,504 INFO L225 Difference]: With dead ends: 171 [2019-12-07 18:43:46,505 INFO L226 Difference]: Without dead ends: 143 [2019-12-07 18:43:46,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:43:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-07 18:43:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2019-12-07 18:43:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-07 18:43:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 182 transitions. [2019-12-07 18:43:46,518 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 182 transitions. Word has length 11 [2019-12-07 18:43:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:46,518 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 182 transitions. [2019-12-07 18:43:46,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:43:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 182 transitions. [2019-12-07 18:43:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:43:46,519 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:46,519 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:46,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 18:43:46,719 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash 685151225, now seen corresponding path program 1 times [2019-12-07 18:43:46,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:46,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791864586] [2019-12-07 18:43:46,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:46,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:43:46,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:46,783 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:46,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791864586] [2019-12-07 18:43:46,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:46,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2019-12-07 18:43:46,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305826901] [2019-12-07 18:43:46,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:43:46,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:43:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:43:46,832 INFO L87 Difference]: Start difference. First operand 111 states and 182 transitions. Second operand 12 states. [2019-12-07 18:43:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:47,299 INFO L93 Difference]: Finished difference Result 272 states and 462 transitions. [2019-12-07 18:43:47,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:43:47,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2019-12-07 18:43:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:47,301 INFO L225 Difference]: With dead ends: 272 [2019-12-07 18:43:47,301 INFO L226 Difference]: Without dead ends: 227 [2019-12-07 18:43:47,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:43:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-07 18:43:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 183. [2019-12-07 18:43:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-12-07 18:43:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 291 transitions. [2019-12-07 18:43:47,313 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 291 transitions. Word has length 13 [2019-12-07 18:43:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:47,314 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 291 transitions. [2019-12-07 18:43:47,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:43:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 291 transitions. [2019-12-07 18:43:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 18:43:47,315 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:47,315 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:47,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 18:43:47,516 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1372883746, now seen corresponding path program 1 times [2019-12-07 18:43:47,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:47,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327769852] [2019-12-07 18:43:47,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:47,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 18:43:47,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:47,588 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:47,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327769852] [2019-12-07 18:43:47,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:47,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-12-07 18:43:47,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613737544] [2019-12-07 18:43:47,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:43:47,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:47,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:43:47,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:47,600 INFO L87 Difference]: Start difference. First operand 183 states and 291 transitions. Second operand 6 states. [2019-12-07 18:43:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:47,804 INFO L93 Difference]: Finished difference Result 818 states and 1311 transitions. [2019-12-07 18:43:47,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:43:47,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-12-07 18:43:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:47,809 INFO L225 Difference]: With dead ends: 818 [2019-12-07 18:43:47,810 INFO L226 Difference]: Without dead ends: 659 [2019-12-07 18:43:47,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:43:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2019-12-07 18:43:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 394. [2019-12-07 18:43:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2019-12-07 18:43:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 592 transitions. [2019-12-07 18:43:47,845 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 592 transitions. Word has length 25 [2019-12-07 18:43:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:47,845 INFO L462 AbstractCegarLoop]: Abstraction has 394 states and 592 transitions. [2019-12-07 18:43:47,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:43:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 592 transitions. [2019-12-07 18:43:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 18:43:47,849 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:47,849 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:48,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 18:43:48,049 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:48,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:48,050 INFO L82 PathProgramCache]: Analyzing trace with hash 384753001, now seen corresponding path program 1 times [2019-12-07 18:43:48,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:48,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565575973] [2019-12-07 18:43:48,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:48,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:43:48,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:48,108 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:48,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565575973] [2019-12-07 18:43:48,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:48,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-12-07 18:43:48,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435698906] [2019-12-07 18:43:48,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:43:48,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:43:48,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:43:48,158 INFO L87 Difference]: Start difference. First operand 394 states and 592 transitions. Second operand 12 states. [2019-12-07 18:43:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:48,552 INFO L93 Difference]: Finished difference Result 1098 states and 1726 transitions. [2019-12-07 18:43:48,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:43:48,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-12-07 18:43:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:48,558 INFO L225 Difference]: With dead ends: 1098 [2019-12-07 18:43:48,558 INFO L226 Difference]: Without dead ends: 939 [2019-12-07 18:43:48,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:43:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2019-12-07 18:43:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 720. [2019-12-07 18:43:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2019-12-07 18:43:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1083 transitions. [2019-12-07 18:43:48,586 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1083 transitions. Word has length 27 [2019-12-07 18:43:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:48,586 INFO L462 AbstractCegarLoop]: Abstraction has 720 states and 1083 transitions. [2019-12-07 18:43:48,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:43:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1083 transitions. [2019-12-07 18:43:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 18:43:48,589 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:48,589 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:48,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 18:43:48,791 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:48,792 INFO L82 PathProgramCache]: Analyzing trace with hash -685167599, now seen corresponding path program 1 times [2019-12-07 18:43:48,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:48,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720864641] [2019-12-07 18:43:48,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:48,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 18:43:48,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:48,890 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:48,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720864641] [2019-12-07 18:43:48,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:48,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 18:43:48,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18944008] [2019-12-07 18:43:48,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:43:48,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:43:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:43:48,902 INFO L87 Difference]: Start difference. First operand 720 states and 1083 transitions. Second operand 4 states. [2019-12-07 18:43:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:49,028 INFO L93 Difference]: Finished difference Result 1756 states and 2708 transitions. [2019-12-07 18:43:49,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:43:49,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-12-07 18:43:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:49,034 INFO L225 Difference]: With dead ends: 1756 [2019-12-07 18:43:49,034 INFO L226 Difference]: Without dead ends: 1105 [2019-12-07 18:43:49,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:43:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2019-12-07 18:43:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1039. [2019-12-07 18:43:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-12-07 18:43:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1467 transitions. [2019-12-07 18:43:49,063 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1467 transitions. Word has length 30 [2019-12-07 18:43:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:49,063 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1467 transitions. [2019-12-07 18:43:49,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:43:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1467 transitions. [2019-12-07 18:43:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 18:43:49,064 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:49,064 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:49,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-12-07 18:43:49,265 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1269793299, now seen corresponding path program 1 times [2019-12-07 18:43:49,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:49,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050073098] [2019-12-07 18:43:49,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:49,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 18:43:49,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:49,294 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:49,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050073098] [2019-12-07 18:43:49,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:49,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 18:43:49,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851551754] [2019-12-07 18:43:49,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:43:49,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:43:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:43:49,300 INFO L87 Difference]: Start difference. First operand 1039 states and 1467 transitions. Second operand 4 states. [2019-12-07 18:43:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:49,388 INFO L93 Difference]: Finished difference Result 2036 states and 2888 transitions. [2019-12-07 18:43:49,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:43:49,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-12-07 18:43:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:49,392 INFO L225 Difference]: With dead ends: 2036 [2019-12-07 18:43:49,392 INFO L226 Difference]: Without dead ends: 1108 [2019-12-07 18:43:49,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:43:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2019-12-07 18:43:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1023. [2019-12-07 18:43:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2019-12-07 18:43:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1398 transitions. [2019-12-07 18:43:49,413 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1398 transitions. Word has length 30 [2019-12-07 18:43:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:49,413 INFO L462 AbstractCegarLoop]: Abstraction has 1023 states and 1398 transitions. [2019-12-07 18:43:49,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:43:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1398 transitions. [2019-12-07 18:43:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 18:43:49,414 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:49,414 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:49,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-12-07 18:43:49,615 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:49,615 INFO L82 PathProgramCache]: Analyzing trace with hash -900742063, now seen corresponding path program 1 times [2019-12-07 18:43:49,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:49,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270055876] [2019-12-07 18:43:49,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:49,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:43:49,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:49,683 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:49,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270055876] [2019-12-07 18:43:49,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:43:49,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2019-12-07 18:43:49,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048711457] [2019-12-07 18:43:49,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:43:49,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:49,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:43:49,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:43:49,753 INFO L87 Difference]: Start difference. First operand 1023 states and 1398 transitions. Second operand 6 states. [2019-12-07 18:43:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:49,971 INFO L93 Difference]: Finished difference Result 1385 states and 1902 transitions. [2019-12-07 18:43:49,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:43:49,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-12-07 18:43:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:49,975 INFO L225 Difference]: With dead ends: 1385 [2019-12-07 18:43:49,975 INFO L226 Difference]: Without dead ends: 1117 [2019-12-07 18:43:49,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:43:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2019-12-07 18:43:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1065. [2019-12-07 18:43:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-12-07 18:43:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1448 transitions. [2019-12-07 18:43:49,996 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1448 transitions. Word has length 30 [2019-12-07 18:43:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:49,996 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1448 transitions. [2019-12-07 18:43:49,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:43:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1448 transitions. [2019-12-07 18:43:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 18:43:49,998 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:49,998 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:50,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-12-07 18:43:50,199 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash -342382578, now seen corresponding path program 1 times [2019-12-07 18:43:50,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:50,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299193402] [2019-12-07 18:43:50,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:50,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:43:50,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:50,250 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:50,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299193402] [2019-12-07 18:43:50,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:43:50,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-12-07 18:43:50,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13727744] [2019-12-07 18:43:50,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:43:50,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:43:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:43:50,288 INFO L87 Difference]: Start difference. First operand 1065 states and 1448 transitions. Second operand 10 states. [2019-12-07 18:43:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:50,882 INFO L93 Difference]: Finished difference Result 2275 states and 3108 transitions. [2019-12-07 18:43:50,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:43:50,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-12-07 18:43:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:50,888 INFO L225 Difference]: With dead ends: 2275 [2019-12-07 18:43:50,888 INFO L226 Difference]: Without dead ends: 1429 [2019-12-07 18:43:50,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:43:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2019-12-07 18:43:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1159. [2019-12-07 18:43:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2019-12-07 18:43:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1529 transitions. [2019-12-07 18:43:50,920 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1529 transitions. Word has length 31 [2019-12-07 18:43:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:50,920 INFO L462 AbstractCegarLoop]: Abstraction has 1159 states and 1529 transitions. [2019-12-07 18:43:50,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:43:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1529 transitions. [2019-12-07 18:43:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 18:43:50,922 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:50,922 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:51,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2019-12-07 18:43:51,123 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:51,123 INFO L82 PathProgramCache]: Analyzing trace with hash -610252502, now seen corresponding path program 1 times [2019-12-07 18:43:51,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:51,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018360274] [2019-12-07 18:43:51,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:51,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 18:43:51,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:51,159 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:43:51,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018360274] [2019-12-07 18:43:51,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:43:51,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 18:43:51,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075230985] [2019-12-07 18:43:51,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:43:51,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:51,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:43:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:43:51,174 INFO L87 Difference]: Start difference. First operand 1159 states and 1529 transitions. Second operand 6 states. [2019-12-07 18:43:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:43:51,402 INFO L93 Difference]: Finished difference Result 2557 states and 3531 transitions. [2019-12-07 18:43:51,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:43:51,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-12-07 18:43:51,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:43:51,408 INFO L225 Difference]: With dead ends: 2557 [2019-12-07 18:43:51,408 INFO L226 Difference]: Without dead ends: 1661 [2019-12-07 18:43:51,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:43:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2019-12-07 18:43:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1398. [2019-12-07 18:43:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1398 states. [2019-12-07 18:43:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 1923 transitions. [2019-12-07 18:43:51,431 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 1923 transitions. Word has length 32 [2019-12-07 18:43:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:43:51,432 INFO L462 AbstractCegarLoop]: Abstraction has 1398 states and 1923 transitions. [2019-12-07 18:43:51,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:43:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 1923 transitions. [2019-12-07 18:43:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 18:43:51,433 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:43:51,433 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:43:51,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2019-12-07 18:43:51,634 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:43:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:43:51,635 INFO L82 PathProgramCache]: Analyzing trace with hash 126573537, now seen corresponding path program 1 times [2019-12-07 18:43:51,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:43:51,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886855451] [2019-12-07 18:43:51,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2019-12-07 18:43:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:43:51,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 18:43:51,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:43:52,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:43:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:43:52,437 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:43:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:43:54,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886855451] [2019-12-07 18:43:54,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:43:54,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2019-12-07 18:43:54,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160276926] [2019-12-07 18:43:54,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 18:43:54,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:43:54,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 18:43:54,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 18:43:54,358 INFO L87 Difference]: Start difference. First operand 1398 states and 1923 transitions. Second operand 38 states. [2019-12-07 18:44:00,631 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2019-12-07 18:44:01,150 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2019-12-07 18:44:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:44:02,692 INFO L93 Difference]: Finished difference Result 2355 states and 3157 transitions. [2019-12-07 18:44:02,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-07 18:44:02,692 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2019-12-07 18:44:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:44:02,700 INFO L225 Difference]: With dead ends: 2355 [2019-12-07 18:44:02,700 INFO L226 Difference]: Without dead ends: 2271 [2019-12-07 18:44:02,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2019-12-07 18:44:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2019-12-07 18:44:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1575. [2019-12-07 18:44:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2019-12-07 18:44:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2161 transitions. [2019-12-07 18:44:02,734 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2161 transitions. Word has length 50 [2019-12-07 18:44:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:44:02,734 INFO L462 AbstractCegarLoop]: Abstraction has 1575 states and 2161 transitions. [2019-12-07 18:44:02,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 18:44:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2161 transitions. [2019-12-07 18:44:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 18:44:02,736 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:44:02,736 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:44:02,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2019-12-07 18:44:02,937 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:44:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:44:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash -884543713, now seen corresponding path program 1 times [2019-12-07 18:44:02,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:44:02,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657843481] [2019-12-07 18:44:02,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2019-12-07 18:44:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:44:02,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:44:03,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:44:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:44:03,027 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:44:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:44:03,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657843481] [2019-12-07 18:44:03,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:44:03,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-12-07 18:44:03,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312907989] [2019-12-07 18:44:03,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:44:03,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:44:03,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:44:03,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:44:03,051 INFO L87 Difference]: Start difference. First operand 1575 states and 2161 transitions. Second operand 7 states. [2019-12-07 18:44:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:44:03,206 INFO L93 Difference]: Finished difference Result 3124 states and 4294 transitions. [2019-12-07 18:44:03,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:44:03,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-12-07 18:44:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:44:03,212 INFO L225 Difference]: With dead ends: 3124 [2019-12-07 18:44:03,212 INFO L226 Difference]: Without dead ends: 1608 [2019-12-07 18:44:03,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:44:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2019-12-07 18:44:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1495. [2019-12-07 18:44:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1495 states. [2019-12-07 18:44:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2010 transitions. [2019-12-07 18:44:03,239 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2010 transitions. Word has length 50 [2019-12-07 18:44:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:44:03,239 INFO L462 AbstractCegarLoop]: Abstraction has 1495 states and 2010 transitions. [2019-12-07 18:44:03,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:44:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2010 transitions. [2019-12-07 18:44:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 18:44:03,240 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:44:03,240 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:44:03,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2019-12-07 18:44:03,441 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:44:03,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:44:03,441 INFO L82 PathProgramCache]: Analyzing trace with hash 103941283, now seen corresponding path program 1 times [2019-12-07 18:44:03,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:44:03,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118770891] [2019-12-07 18:44:03,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2019-12-07 18:44:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:44:03,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 18:44:03,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:44:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-07 18:44:03,472 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:44:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-07 18:44:03,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118770891] [2019-12-07 18:44:03,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:44:03,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 18:44:03,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075729230] [2019-12-07 18:44:03,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:44:03,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:44:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:44:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:44:03,480 INFO L87 Difference]: Start difference. First operand 1495 states and 2010 transitions. Second operand 4 states. [2019-12-07 18:44:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:44:03,515 INFO L93 Difference]: Finished difference Result 2051 states and 2730 transitions. [2019-12-07 18:44:03,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:44:03,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-12-07 18:44:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:44:03,522 INFO L225 Difference]: With dead ends: 2051 [2019-12-07 18:44:03,522 INFO L226 Difference]: Without dead ends: 2023 [2019-12-07 18:44:03,522 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:44:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2019-12-07 18:44:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1852. [2019-12-07 18:44:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1852 states. [2019-12-07 18:44:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2485 transitions. [2019-12-07 18:44:03,555 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2485 transitions. Word has length 50 [2019-12-07 18:44:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:44:03,556 INFO L462 AbstractCegarLoop]: Abstraction has 1852 states and 2485 transitions. [2019-12-07 18:44:03,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:44:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2485 transitions. [2019-12-07 18:44:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 18:44:03,557 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:44:03,558 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:44:03,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2019-12-07 18:44:03,759 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:44:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:44:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash -770819741, now seen corresponding path program 1 times [2019-12-07 18:44:03,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:44:03,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431527380] [2019-12-07 18:44:03,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2019-12-07 18:44:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:44:03,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:44:03,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:44:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-07 18:44:03,882 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:44:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-07 18:44:03,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431527380] [2019-12-07 18:44:03,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:44:03,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2019-12-07 18:44:03,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329102291] [2019-12-07 18:44:03,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:44:03,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:44:03,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:44:03,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:44:03,946 INFO L87 Difference]: Start difference. First operand 1852 states and 2485 transitions. Second operand 7 states. [2019-12-07 18:44:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:44:04,224 INFO L93 Difference]: Finished difference Result 2071 states and 2756 transitions. [2019-12-07 18:44:04,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:44:04,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-12-07 18:44:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:44:04,231 INFO L225 Difference]: With dead ends: 2071 [2019-12-07 18:44:04,231 INFO L226 Difference]: Without dead ends: 1937 [2019-12-07 18:44:04,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:44:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2019-12-07 18:44:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1846. [2019-12-07 18:44:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2019-12-07 18:44:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2477 transitions. [2019-12-07 18:44:04,262 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2477 transitions. Word has length 50 [2019-12-07 18:44:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:44:04,262 INFO L462 AbstractCegarLoop]: Abstraction has 1846 states and 2477 transitions. [2019-12-07 18:44:04,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:44:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2477 transitions. [2019-12-07 18:44:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-07 18:44:04,263 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:44:04,263 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:44:04,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2019-12-07 18:44:04,465 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:44:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:44:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash 928939180, now seen corresponding path program 1 times [2019-12-07 18:44:04,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:44:04,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691533329] [2019-12-07 18:44:04,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2019-12-07 18:44:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:44:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:44:04,611 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-12-07 18:44:04,611 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 18:44:04,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2019-12-07 18:44:04,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:44:04 BoogieIcfgContainer [2019-12-07 18:44:04,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:44:04,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:44:04,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:44:04,869 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:44:04,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:43:45" (3/4) ... [2019-12-07 18:44:04,871 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 18:44:04,912 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dc10003b-02b0-4787-a4aa-06dae7af67ad/bin/uautomizer/witness.graphml [2019-12-07 18:44:04,912 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:44:04,913 INFO L168 Benchmark]: Toolchain (without parser) took 19759.67 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 349.7 MB). Free memory was 953.7 MB in the beginning and 1.0 GB in the end (delta: -82.0 MB). Peak memory consumption was 267.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:44:04,913 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:44:04,914 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. [2019-12-07 18:44:04,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.29 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 18:44:04,914 INFO L168 Benchmark]: Boogie Preprocessor took 19.23 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. [2019-12-07 18:44:04,914 INFO L168 Benchmark]: RCFGBuilder took 247.51 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2019-12-07 18:44:04,914 INFO L168 Benchmark]: TraceAbstraction took 19210.66 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 220.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.2 MB). Peak memory consumption was 267.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:44:04,915 INFO L168 Benchmark]: Witness Printer took 43.37 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:44:04,916 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 208.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.29 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 247.51 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19210.66 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 220.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.2 MB). Peak memory consumption was 267.9 MB. Max. memory is 11.5 GB. * Witness Printer took 43.37 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L105] unsigned int a, b, r; [L107] a = __VERIFIER_nondet_uint() [L108] b = __VERIFIER_nondet_uint() [L23] unsigned char a0, a1, a2, a3; [L24] unsigned char b0, b1, b2, b3; [L25] unsigned char r0, r1, r2, r3; [L26] unsigned short carry; [L27] unsigned short partial_sum; [L28] unsigned int r; [L29] unsigned char i; [L30] unsigned char na, nb; [L31] a0 = a [L32] a1 = a >> 8 [L33] a2 = a >> 16U [L34] a3 = a >> 24U [L35] b0 = b [L36] b1 = b >> 8U [L37] b2 = b >> 16U [L38] b3 = b >> 24U [L39] na = (unsigned char)4 [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 [L49] nb = (unsigned char)4 [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND TRUE i < na [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 [L66] COND FALSE !(i == (unsigned char)1) [L67] COND FALSE !(i == (unsigned char)2) [L68] COND FALSE !(i == (unsigned char)3) [L70] COND TRUE i < nb [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 [L72] COND FALSE !(i == (unsigned char)1) [L73] COND FALSE !(i == (unsigned char)2) [L74] COND FALSE !(i == (unsigned char)3) [L76] COND TRUE partial_sum > ((unsigned char)254) [L77] partial_sum = partial_sum & ((unsigned char)255) [L78] carry = (unsigned short)1 [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum [L81] COND FALSE !(i == (unsigned char)1) [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND FALSE !(i < na) [L70] COND FALSE !(i < nb) [L76] COND FALSE !(partial_sum > ((unsigned char)254)) [L80] COND FALSE !(i == (unsigned char)0) [L81] COND TRUE i == (unsigned char)1 [L81] r1 = (unsigned char)partial_sum [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND FALSE !(i == (unsigned char)2) [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 [L94] i = i + (unsigned char)1 [L88] COND FALSE !(i < (unsigned char)4) [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; [L110] r = mp_add(a, b) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.1s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1203 SDtfs, 5851 SDslu, 6371 SDs, 0 SdLazy, 5949 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 918 GetRequests, 747 SyntacticMatches, 5 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1852occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 2367 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 493 NumberOfCodeBlocks, 493 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 852 ConstructedInterpolants, 43 QuantifiedInterpolants, 297740 SizeOfPredicates, 47 NumberOfNonLiveVariables, 874 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 28 InterpolantComputations, 20 PerfectInterpolantSequences, 157/190 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...