./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 ................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 22:23:33,175 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 22:23:33,176 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 22:23:33,182 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 22:23:33,182 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 22:23:33,183 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 22:23:33,183 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 22:23:33,184 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 22:23:33,185 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 22:23:33,185 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 22:23:33,186 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 22:23:33,186 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 22:23:33,186 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 22:23:33,187 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 22:23:33,187 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 22:23:33,188 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 22:23:33,188 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 22:23:33,189 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 22:23:33,190 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 22:23:33,191 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 22:23:33,191 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 22:23:33,192 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 22:23:33,193 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 22:23:33,193 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 22:23:33,193 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 22:23:33,194 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 22:23:33,194 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 22:23:33,195 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 22:23:33,195 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 22:23:33,196 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 22:23:33,196 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 22:23:33,197 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 22:23:33,197 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 22:23:33,197 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 22:23:33,198 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 22:23:33,198 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 22:23:33,198 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 22:23:33,206 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 22:23:33,206 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 22:23:33,207 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 22:23:33,207 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 22:23:33,207 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 22:23:33,207 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 22:23:33,208 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 22:23:33,208 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 22:23:33,208 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 22:23:33,208 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 22:23:33,208 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 22:23:33,208 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 22:23:33,208 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 22:23:33,209 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 22:23:33,209 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 22:23:33,209 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 22:23:33,209 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 22:23:33,210 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 22:23:33,210 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 22:23:33,210 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 22:23:33,210 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 22:23:33,210 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 22:23:33,210 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 22:23:33,210 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 22:23:33,211 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 22:23:33,211 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 22:23:33,211 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 22:23:33,211 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 22:23:33,211 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 22:23:33,211 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 22:23:33,211 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 22:23:33,212 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 22:23:33,212 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 22:23:33,212 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 22:23:33,212 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 22:23:33,212 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 22:23:33,212 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan 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 -> Taipan 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 -> 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 [2018-12-02 22:23:33,234 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 22:23:33,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 22:23:33,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 22:23:33,244 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 22:23:33,244 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 22:23:33,245 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-02 22:23:33,278 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/61f935fe6/4e0967631b7642e8bdcde1050d31118e/FLAGd2d106114 [2018-12-02 22:23:33,607 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 22:23:33,607 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-02 22:23:33,614 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/61f935fe6/4e0967631b7642e8bdcde1050d31118e/FLAGd2d106114 [2018-12-02 22:23:34,001 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/61f935fe6/4e0967631b7642e8bdcde1050d31118e [2018-12-02 22:23:34,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 22:23:34,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 22:23:34,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 22:23:34,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 22:23:34,008 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 22:23:34,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211e4e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34, skipping insertion in model container [2018-12-02 22:23:34,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 22:23:34,041 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 22:23:34,211 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:23:34,218 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 22:23:34,275 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:23:34,304 INFO L195 MainTranslator]: Completed translation [2018-12-02 22:23:34,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34 WrapperNode [2018-12-02 22:23:34,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 22:23:34,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 22:23:34,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 22:23:34,305 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 22:23:34,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 22:23:34,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 22:23:34,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 22:23:34,331 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 22:23:34,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... [2018-12-02 22:23:34,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 22:23:34,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 22:23:34,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 22:23:34,347 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 22:23:34,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 22:23:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 22:23:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-02 22:23:34,390 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-02 22:23:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-02 22:23:34,390 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-02 22:23:34,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 22:23:34,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-02 22:23:34,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 22:23:34,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-02 22:23:34,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 22:23:34,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 22:23:34,392 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-02 22:23:34,544 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 22:23:34,544 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-02 22:23:34,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:23:34 BoogieIcfgContainer [2018-12-02 22:23:34,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 22:23:34,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 22:23:34,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 22:23:34,547 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 22:23:34,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:23:34" (1/3) ... [2018-12-02 22:23:34,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10da9d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:23:34, skipping insertion in model container [2018-12-02 22:23:34,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:34" (2/3) ... [2018-12-02 22:23:34,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10da9d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:23:34, skipping insertion in model container [2018-12-02 22:23:34,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:23:34" (3/3) ... [2018-12-02 22:23:34,549 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_false-unreach-call.i [2018-12-02 22:23:34,571 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,571 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,572 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,572 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,572 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,572 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,573 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,573 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,573 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,573 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,573 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,574 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,574 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,574 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,574 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,575 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,575 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,575 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,575 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,575 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,576 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,576 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,576 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,576 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,576 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,577 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,577 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,577 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:34,584 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-02 22:23:34,585 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 22:23:34,591 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 22:23:34,601 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 22:23:34,616 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 22:23:34,616 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 22:23:34,616 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 22:23:34,617 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 22:23:34,617 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 22:23:34,617 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 22:23:34,617 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 22:23:34,617 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 22:23:34,622 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-02 22:23:34,658 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-02 22:23:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-02 22:23:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 22:23:34,668 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:34,668 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:34,670 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:34,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-02 22:23:34,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:23:34,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:34,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:34,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:34,712 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:23:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:34,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:34,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:23:34,815 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:23:34,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 22:23:34,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 22:23:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 22:23:34,828 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-02 22:23:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:34,894 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-02 22:23:34,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:23:34,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-02 22:23:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:34,904 INFO L225 Difference]: With dead ends: 1411 [2018-12-02 22:23:34,904 INFO L226 Difference]: Without dead ends: 322 [2018-12-02 22:23:34,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-02 22:23:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-02 22:23:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-02 22:23:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-02 22:23:34,939 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-02 22:23:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:34,939 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-02 22:23:34,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 22:23:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-02 22:23:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 22:23:34,940 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:34,940 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:34,940 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:34,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-02 22:23:34,941 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:23:34,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:34,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:34,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:34,944 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:23:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:34,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:34,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:23:34,981 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:23:34,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 22:23:34,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 22:23:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 22:23:34,982 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-02 22:23:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:35,009 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-02 22:23:35,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:23:35,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-02 22:23:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:35,011 INFO L225 Difference]: With dead ends: 411 [2018-12-02 22:23:35,011 INFO L226 Difference]: Without dead ends: 290 [2018-12-02 22:23:35,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-02 22:23:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-02 22:23:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-02 22:23:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-02 22:23:35,020 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-02 22:23:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:35,020 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-02 22:23:35,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 22:23:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-02 22:23:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 22:23:35,021 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:35,021 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:35,021 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:35,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-02 22:23:35,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:23:35,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:35,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:35,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:35,025 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:23:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:35,078 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:35,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 22:23:35,079 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:23:35,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 22:23:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:23:35,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:35,079 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-02 22:23:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:35,118 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-02 22:23:35,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:23:35,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 22:23:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:35,119 INFO L225 Difference]: With dead ends: 437 [2018-12-02 22:23:35,119 INFO L226 Difference]: Without dead ends: 309 [2018-12-02 22:23:35,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-02 22:23:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-02 22:23:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-02 22:23:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-02 22:23:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-02 22:23:35,129 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-02 22:23:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:35,129 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-02 22:23:35,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 22:23:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-02 22:23:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 22:23:35,130 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:35,131 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:35,131 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:35,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-02 22:23:35,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:23:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:35,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:35,134 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:23:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:35,192 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:35,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 22:23:35,192 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:23:35,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 22:23:35,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:23:35,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:35,192 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-02 22:23:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:35,230 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-02 22:23:35,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:23:35,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 22:23:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:35,232 INFO L225 Difference]: With dead ends: 456 [2018-12-02 22:23:35,232 INFO L226 Difference]: Without dead ends: 319 [2018-12-02 22:23:35,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-02 22:23:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-02 22:23:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-02 22:23:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-02 22:23:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-02 22:23:35,242 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-02 22:23:35,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:35,242 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-02 22:23:35,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 22:23:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-02 22:23:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 22:23:35,244 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:35,244 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:35,244 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:35,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:35,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-02 22:23:35,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:23:35,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:35,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:23:35,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:23:35,247 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:23:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:35,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:23:35,299 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 22:23:35,300 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.handleInfeasibleCase(BaseRefinementStrategy.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:206) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:169) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.constructInterpolantGenerator(BaseTaipanRefinementStrategy.java:379) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getInterpolantGenerator(BaseTaipanRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:380) ... 20 more [2018-12-02 22:23:35,303 INFO L168 Benchmark]: Toolchain (without parser) took 1299.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 950.6 MB in the beginning and 941.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 11.5 GB. [2018-12-02 22:23:35,304 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:23:35,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -136.6 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-12-02 22:23:35,305 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.75 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:23:35,306 INFO L168 Benchmark]: Boogie Preprocessor took 15.62 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 22:23:35,306 INFO L168 Benchmark]: RCFGBuilder took 197.54 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-12-02 22:23:35,306 INFO L168 Benchmark]: TraceAbstraction took 757.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.3 MB in the end (delta: 123.6 MB). Peak memory consumption was 123.6 MB. Max. memory is 11.5 GB. [2018-12-02 22:23:35,309 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -136.6 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.75 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.62 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 197.54 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 757.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.3 MB in the end (delta: 123.6 MB). Peak memory consumption was 123.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-02 22:23:36,701 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 22:23:36,702 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 22:23:36,708 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 22:23:36,708 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 22:23:36,708 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 22:23:36,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 22:23:36,710 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 22:23:36,711 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 22:23:36,711 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 22:23:36,711 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 22:23:36,711 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 22:23:36,712 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 22:23:36,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 22:23:36,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 22:23:36,713 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 22:23:36,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 22:23:36,714 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 22:23:36,715 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 22:23:36,716 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 22:23:36,717 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 22:23:36,717 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 22:23:36,718 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 22:23:36,718 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 22:23:36,718 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 22:23:36,719 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 22:23:36,719 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 22:23:36,720 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 22:23:36,720 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 22:23:36,721 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 22:23:36,721 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 22:23:36,721 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 22:23:36,721 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 22:23:36,721 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 22:23:36,722 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 22:23:36,722 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 22:23:36,722 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-02 22:23:36,729 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 22:23:36,730 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 22:23:36,730 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 22:23:36,730 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 22:23:36,730 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 22:23:36,730 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 22:23:36,730 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 22:23:36,731 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 22:23:36,731 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 22:23:36,731 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 22:23:36,731 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 22:23:36,731 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 22:23:36,731 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 22:23:36,731 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 22:23:36,732 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 22:23:36,732 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 22:23:36,733 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-02 22:23:36,733 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan 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 -> Taipan 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 -> 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 [2018-12-02 22:23:36,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 22:23:36,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 22:23:36,763 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 22:23:36,765 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 22:23:36,765 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 22:23:36,766 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-02 22:23:36,806 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/ebe75399f/47f701b61d784fb7a1c6dd303dbbd435/FLAGbea5887ab [2018-12-02 22:23:37,223 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 22:23:37,224 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-02 22:23:37,229 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/ebe75399f/47f701b61d784fb7a1c6dd303dbbd435/FLAGbea5887ab [2018-12-02 22:23:37,237 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/data/ebe75399f/47f701b61d784fb7a1c6dd303dbbd435 [2018-12-02 22:23:37,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 22:23:37,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 22:23:37,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 22:23:37,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 22:23:37,243 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 22:23:37,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4e6b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37, skipping insertion in model container [2018-12-02 22:23:37,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 22:23:37,276 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 22:23:37,444 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:23:37,453 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 22:23:37,520 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:23:37,555 INFO L195 MainTranslator]: Completed translation [2018-12-02 22:23:37,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37 WrapperNode [2018-12-02 22:23:37,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 22:23:37,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 22:23:37,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 22:23:37,556 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 22:23:37,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 22:23:37,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 22:23:37,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 22:23:37,584 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 22:23:37,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... [2018-12-02 22:23:37,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 22:23:37,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 22:23:37,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 22:23:37,601 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 22:23:37,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 22:23:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 22:23:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-02 22:23:37,634 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-02 22:23:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-02 22:23:37,634 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-02 22:23:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-02 22:23:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 22:23:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-02 22:23:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-02 22:23:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 22:23:37,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 22:23:37,636 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-02 22:23:37,795 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 22:23:37,795 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-02 22:23:37,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:23:37 BoogieIcfgContainer [2018-12-02 22:23:37,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 22:23:37,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 22:23:37,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 22:23:37,798 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 22:23:37,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:23:37" (1/3) ... [2018-12-02 22:23:37,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3215b802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:23:37, skipping insertion in model container [2018-12-02 22:23:37,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:23:37" (2/3) ... [2018-12-02 22:23:37,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3215b802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:23:37, skipping insertion in model container [2018-12-02 22:23:37,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:23:37" (3/3) ... [2018-12-02 22:23:37,800 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_false-unreach-call.i [2018-12-02 22:23:37,818 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,818 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,818 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,818 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,818 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,818 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,819 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,820 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,821 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,821 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,821 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 22:23:37,826 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-02 22:23:37,826 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 22:23:37,831 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 22:23:37,839 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 22:23:37,854 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 22:23:37,854 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 22:23:37,854 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 22:23:37,855 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 22:23:37,855 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 22:23:37,855 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 22:23:37,855 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 22:23:37,855 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 22:23:37,855 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 22:23:37,862 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-02 22:23:37,904 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-02 22:23:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-02 22:23:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 22:23:37,914 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:37,914 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:37,916 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:37,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-02 22:23:37,923 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:37,924 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:37,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:37,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:38,035 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 22:23:38,037 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:38,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:23:38,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 22:23:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 22:23:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 22:23:38,049 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-02 22:23:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:38,139 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2018-12-02 22:23:38,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:23:38,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-02 22:23:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:38,151 INFO L225 Difference]: With dead ends: 1777 [2018-12-02 22:23:38,151 INFO L226 Difference]: Without dead ends: 499 [2018-12-02 22:23:38,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-12-02 22:23:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-12-02 22:23:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2018-12-02 22:23:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-12-02 22:23:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2018-12-02 22:23:38,191 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2018-12-02 22:23:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:38,191 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2018-12-02 22:23:38,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 22:23:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2018-12-02 22:23:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 22:23:38,192 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:38,192 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:38,192 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:38,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:38,192 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-02 22:23:38,193 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:38,193 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:38,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:38,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:38,260 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 22:23:38,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:38,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:23:38,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 22:23:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 22:23:38,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 22:23:38,263 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2018-12-02 22:23:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:38,313 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2018-12-02 22:23:38,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:23:38,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-02 22:23:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:38,316 INFO L225 Difference]: With dead ends: 464 [2018-12-02 22:23:38,316 INFO L226 Difference]: Without dead ends: 343 [2018-12-02 22:23:38,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-02 22:23:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2018-12-02 22:23:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-02 22:23:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2018-12-02 22:23:38,329 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2018-12-02 22:23:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:38,330 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2018-12-02 22:23:38,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 22:23:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2018-12-02 22:23:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 22:23:38,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:38,331 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:38,331 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:38,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash 676041288, now seen corresponding path program 1 times [2018-12-02 22:23:38,332 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:38,332 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:38,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:38,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:38,405 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 22:23:38,407 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:38,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:23:38,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 22:23:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 22:23:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 22:23:38,407 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2018-12-02 22:23:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:38,443 INFO L93 Difference]: Finished difference Result 420 states and 1016 transitions. [2018-12-02 22:23:38,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:23:38,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-02 22:23:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:38,445 INFO L225 Difference]: With dead ends: 420 [2018-12-02 22:23:38,445 INFO L226 Difference]: Without dead ends: 290 [2018-12-02 22:23:38,445 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-02 22:23:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-02 22:23:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-02 22:23:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-02 22:23:38,451 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-02 22:23:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:38,451 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-02 22:23:38,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 22:23:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-02 22:23:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 22:23:38,452 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:38,452 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:38,453 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:38,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-02 22:23:38,453 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:38,453 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:38,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:38,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:38,536 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 22:23:38,537 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:38,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 22:23:38,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 22:23:38,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:23:38,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:38,538 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-02 22:23:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:38,613 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-02 22:23:38,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:23:38,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 22:23:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:38,616 INFO L225 Difference]: With dead ends: 437 [2018-12-02 22:23:38,616 INFO L226 Difference]: Without dead ends: 309 [2018-12-02 22:23:38,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-02 22:23:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-02 22:23:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-02 22:23:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-02 22:23:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-02 22:23:38,624 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-02 22:23:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:38,624 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-02 22:23:38,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 22:23:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-02 22:23:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 22:23:38,625 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:38,625 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:38,625 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:38,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-02 22:23:38,626 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:38,626 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:38,643 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-02 22:23:38,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-02 22:23:38,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:23:38,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:38,706 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 22:23:38,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:23:38,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 22:23:38,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 22:23:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:23:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:23:38,708 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-02 22:23:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:38,780 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-02 22:23:38,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:23:38,781 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 22:23:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:38,782 INFO L225 Difference]: With dead ends: 456 [2018-12-02 22:23:38,783 INFO L226 Difference]: Without dead ends: 319 [2018-12-02 22:23:38,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-02 22:23:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-02 22:23:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-02 22:23:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-02 22:23:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-02 22:23:38,791 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-02 22:23:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:38,791 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-02 22:23:38,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 22:23:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-02 22:23:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 22:23:38,792 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:38,792 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:38,792 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:38,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-02 22:23:38,793 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:38,793 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:38,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:23:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:38,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:38,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:39,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:23:39,013 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:23:39,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:39,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:39,041 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:39,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 22:23:39,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-02 22:23:39,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 22:23:39,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 22:23:39,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-02 22:23:39,087 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 11 states. [2018-12-02 22:23:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:39,615 INFO L93 Difference]: Finished difference Result 760 states and 1850 transitions. [2018-12-02 22:23:39,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-02 22:23:39,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-02 22:23:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:39,617 INFO L225 Difference]: With dead ends: 760 [2018-12-02 22:23:39,617 INFO L226 Difference]: Without dead ends: 383 [2018-12-02 22:23:39,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2018-12-02 22:23:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-02 22:23:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 351. [2018-12-02 22:23:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-02 22:23:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-02 22:23:39,626 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-02 22:23:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:39,626 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-02 22:23:39,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 22:23:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-02 22:23:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 22:23:39,627 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:39,627 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:39,628 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:39,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:39,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-02 22:23:39,628 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:39,628 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:39,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:39,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:39,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:39,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:23:39,850 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:23:39,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:39,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:39,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:39,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 22:23:39,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-02 22:23:39,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 22:23:39,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 22:23:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-02 22:23:39,907 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 11 states. [2018-12-02 22:23:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:40,476 INFO L93 Difference]: Finished difference Result 824 states and 1978 transitions. [2018-12-02 22:23:40,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 22:23:40,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-02 22:23:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:40,478 INFO L225 Difference]: With dead ends: 824 [2018-12-02 22:23:40,478 INFO L226 Difference]: Without dead ends: 447 [2018-12-02 22:23:40,478 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2018-12-02 22:23:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-02 22:23:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-02 22:23:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-02 22:23:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-02 22:23:40,485 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 29 [2018-12-02 22:23:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:40,485 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-02 22:23:40,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 22:23:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-02 22:23:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-02 22:23:40,486 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:40,486 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-12-02 22:23:40,486 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:40,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash -956668217, now seen corresponding path program 1 times [2018-12-02 22:23:40,487 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:40,487 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:40,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:40,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 22:23:40,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 22:23:40,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:23:40,973 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:23:40,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:23:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:23:41,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 22:23:41,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 22:23:41,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 22:23:41,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-02 22:23:41,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 22:23:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 22:23:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-02 22:23:41,074 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 17 states. [2018-12-02 22:23:42,173 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2018-12-02 22:23:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:42,767 INFO L93 Difference]: Finished difference Result 1302 states and 3081 transitions. [2018-12-02 22:23:42,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-02 22:23:42,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-12-02 22:23:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:42,770 INFO L225 Difference]: With dead ends: 1302 [2018-12-02 22:23:42,770 INFO L226 Difference]: Without dead ends: 643 [2018-12-02 22:23:42,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2018-12-02 22:23:42,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-12-02 22:23:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 447. [2018-12-02 22:23:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-02 22:23:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-02 22:23:42,783 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 45 [2018-12-02 22:23:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:42,783 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-02 22:23:42,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 22:23:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-02 22:23:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-02 22:23:42,784 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:42,785 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:42,785 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:42,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 2 times [2018-12-02 22:23:42,786 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:42,786 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:42,803 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-02 22:23:42,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 22:23:42,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:23:42,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:42,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:43,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:23:43,694 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:23:43,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 22:23:43,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 22:23:43,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:23:43,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:43,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:43,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 22:23:43,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 25 [2018-12-02 22:23:43,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-02 22:23:43,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-02 22:23:43,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2018-12-02 22:23:43,792 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 25 states. [2018-12-02 22:23:44,363 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 16 [2018-12-02 22:23:44,629 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2018-12-02 22:23:46,334 WARN L180 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-12-02 22:23:46,563 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2018-12-02 22:23:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:47,587 INFO L93 Difference]: Finished difference Result 1522 states and 3619 transitions. [2018-12-02 22:23:47,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-02 22:23:47,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-12-02 22:23:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:47,590 INFO L225 Difference]: With dead ends: 1522 [2018-12-02 22:23:47,590 INFO L226 Difference]: Without dead ends: 735 [2018-12-02 22:23:47,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=654, Invalid=2208, Unknown=0, NotChecked=0, Total=2862 [2018-12-02 22:23:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-12-02 22:23:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-12-02 22:23:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-12-02 22:23:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-12-02 22:23:47,600 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 57 [2018-12-02 22:23:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:47,600 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-12-02 22:23:47,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-02 22:23:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-12-02 22:23:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-02 22:23:47,602 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:47,602 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:47,602 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:47,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 3 times [2018-12-02 22:23:47,602 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:47,602 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:47,623 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-02 22:23:47,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-02 22:23:47,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:23:47,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:47,879 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:48,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:23:48,730 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:23:48,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 22:23:48,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-02 22:23:48,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:23:48,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:48,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:48,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 22:23:48,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17] total 31 [2018-12-02 22:23:48,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-02 22:23:48,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-02 22:23:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2018-12-02 22:23:48,823 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 31 states. [2018-12-02 22:23:49,515 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2018-12-02 22:23:50,616 WARN L180 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-12-02 22:23:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:23:52,709 INFO L93 Difference]: Finished difference Result 1666 states and 3907 transitions. [2018-12-02 22:23:52,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-02 22:23:52,709 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2018-12-02 22:23:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:23:52,711 INFO L225 Difference]: With dead ends: 1666 [2018-12-02 22:23:52,711 INFO L226 Difference]: Without dead ends: 879 [2018-12-02 22:23:52,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=742, Invalid=2918, Unknown=0, NotChecked=0, Total=3660 [2018-12-02 22:23:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-12-02 22:23:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 591. [2018-12-02 22:23:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-12-02 22:23:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1316 transitions. [2018-12-02 22:23:52,717 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1316 transitions. Word has length 69 [2018-12-02 22:23:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:23:52,718 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1316 transitions. [2018-12-02 22:23:52,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-02 22:23:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1316 transitions. [2018-12-02 22:23:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-02 22:23:52,718 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:23:52,719 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:23:52,719 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:23:52,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:23:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 4 times [2018-12-02 22:23:52,719 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:23:52,719 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:23:52,740 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 22:23:52,860 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 22:23:52,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:23:52,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:53,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:54,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:23:54,663 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:23:54,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 22:23:54,698 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 22:23:54,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:23:54,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:23:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:54,711 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:23:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:23:54,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 22:23:54,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23] total 43 [2018-12-02 22:23:54,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-02 22:23:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-02 22:23:54,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2018-12-02 22:23:54,780 INFO L87 Difference]: Start difference. First operand 591 states and 1316 transitions. Second operand 43 states. [2018-12-02 22:23:55,153 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 11 [2018-12-02 22:23:55,453 WARN L180 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 14 [2018-12-02 22:23:56,221 WARN L180 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 18 [2018-12-02 22:23:56,900 WARN L180 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-12-02 22:23:57,610 WARN L180 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-02 22:23:58,340 WARN L180 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-02 22:23:59,033 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-02 22:23:59,744 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-02 22:24:00,397 WARN L180 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-02 22:24:01,060 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-02 22:24:01,663 WARN L180 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-02 22:24:02,255 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 16 [2018-12-02 22:24:02,810 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2018-12-02 22:24:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:24:05,506 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-12-02 22:24:05,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-02 22:24:05,506 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2018-12-02 22:24:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:24:05,509 INFO L225 Difference]: With dead ends: 1026 [2018-12-02 22:24:05,509 INFO L226 Difference]: Without dead ends: 895 [2018-12-02 22:24:05,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2018-12-02 22:24:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-12-02 22:24:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-12-02 22:24:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-12-02 22:24:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-12-02 22:24:05,521 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 93 [2018-12-02 22:24:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:24:05,521 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-12-02 22:24:05,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-02 22:24:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-12-02 22:24:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-02 22:24:05,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:24:05,523 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:24:05,523 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:24:05,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:24:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 5 times [2018-12-02 22:24:05,524 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 22:24:05,524 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 22:24:05,539 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-02 22:24:05,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-12-02 22:24:05,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-12-02 22:24:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:24:05,917 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 22:24:05,981 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-02 22:24:05,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 10:24:05 BasicIcfg [2018-12-02 22:24:05,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 22:24:05,982 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 22:24:05,982 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 22:24:05,982 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 22:24:05,982 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:23:37" (3/4) ... [2018-12-02 22:24:05,984 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 22:24:06,036 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_172362d6-43f7-4f26-aab4-11bbc82922cc/bin-2019/utaipan/witness.graphml [2018-12-02 22:24:06,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 22:24:06,036 INFO L168 Benchmark]: Toolchain (without parser) took 28797.38 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 352.3 MB). Free memory was 939.3 MB in the beginning and 1.3 GB in the end (delta: -365.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:24:06,037 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:24:06,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -174.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. [2018-12-02 22:24:06,037 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.95 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. [2018-12-02 22:24:06,037 INFO L168 Benchmark]: Boogie Preprocessor took 17.22 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:24:06,037 INFO L168 Benchmark]: RCFGBuilder took 195.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-12-02 22:24:06,038 INFO L168 Benchmark]: TraceAbstraction took 28185.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 212.3 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -236.5 MB). Peak memory consumption was 495.7 MB. Max. memory is 11.5 GB. [2018-12-02 22:24:06,038 INFO L168 Benchmark]: Witness Printer took 54.26 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2018-12-02 22:24:06,039 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -174.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.22 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 195.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28185.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 212.3 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -236.5 MB). Peak memory consumption was 495.7 MB. Max. memory is 11.5 GB. * Witness Printer took 54.26 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L682] -1 int condI = i >= (2*10 +6); [L685] -1 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 28.1s OverallTime, 12 OverallIterations, 10 TraceHistogramMax, 21.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 914 SDtfs, 5001 SDslu, 8437 SDs, 0 SdLazy, 2187 SolverSat, 752 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1518 GetRequests, 1225 SyntacticMatches, 4 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 23.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 662 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 854 NumberOfCodeBlocks, 854 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1372 ConstructedInterpolants, 0 QuantifiedInterpolants, 604836 SizeOfPredicates, 166 NumberOfNonLiveVariables, 1226 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 29 InterpolantComputations, 5 PerfectInterpolantSequences, 16/1852 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...