./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/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 f756365182c9801d4a2ac186a40692687a86b469 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/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 f756365182c9801d4a2ac186a40692687a86b469 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:02:06,181 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:02:06,182 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:02:06,191 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:02:06,191 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:02:06,192 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:02:06,192 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:02:06,194 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:02:06,195 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:02:06,196 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:02:06,197 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:02:06,197 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:02:06,197 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:02:06,198 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:02:06,199 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:02:06,200 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:02:06,200 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:02:06,202 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:02:06,203 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:02:06,205 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:02:06,206 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:02:06,207 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:02:06,208 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:02:06,209 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:02:06,209 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:02:06,210 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:02:06,210 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:02:06,211 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:02:06,212 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:02:06,213 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:02:06,213 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:02:06,213 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:02:06,214 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:02:06,214 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:02:06,215 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:02:06,215 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:02:06,216 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 06:02:06,227 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:02:06,227 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:02:06,228 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:02:06,228 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 06:02:06,229 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 06:02:06,229 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 06:02:06,229 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 06:02:06,229 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 06:02:06,229 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 06:02:06,229 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 06:02:06,230 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 06:02:06,230 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:02:06,230 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:02:06,231 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 06:02:06,231 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:02:06,231 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:02:06,231 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 06:02:06,231 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:02:06,231 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 06:02:06,232 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:02:06,232 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 06:02:06,232 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 06:02:06,232 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:02:06,232 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:02:06,233 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:02:06,233 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:02:06,233 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:02:06,233 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:02:06,233 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:02:06,233 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 06:02:06,234 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 06:02:06,234 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:02:06,234 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 06:02:06,234 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 06:02:06,234 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_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/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 -> f756365182c9801d4a2ac186a40692687a86b469 [2018-11-10 06:02:06,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:02:06,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:02:06,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:02:06,272 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:02:06,273 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:02:06,273 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 06:02:06,317 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/805ebef13/017b557dea754fc98ddf8923e2212d5f/FLAG414787171 [2018-11-10 06:02:06,665 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:02:06,665 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 06:02:06,670 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/805ebef13/017b557dea754fc98ddf8923e2212d5f/FLAG414787171 [2018-11-10 06:02:06,681 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/805ebef13/017b557dea754fc98ddf8923e2212d5f [2018-11-10 06:02:06,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:02:06,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 06:02:06,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:02:06,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:02:06,688 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:02:06,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:06,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23480a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06, skipping insertion in model container [2018-11-10 06:02:06,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:06,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:02:06,725 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:02:06,886 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:02:06,889 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:02:06,920 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:02:06,929 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:02:06,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06 WrapperNode [2018-11-10 06:02:06,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:02:06,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 06:02:06,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 06:02:06,930 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 06:02:06,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:06,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:06,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 06:02:06,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:02:06,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:02:06,952 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:02:07,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:07,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:07,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:07,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:07,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:07,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:07,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... [2018-11-10 06:02:07,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:02:07,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:02:07,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:02:07,021 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:02:07,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/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 [2018-11-10 06:02:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:02:07,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:02:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:02:07,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:02:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2018-11-10 06:02:07,067 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2018-11-10 06:02:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:02:07,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:02:07,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 06:02:07,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 06:02:07,068 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2018-11-10 06:02:07,068 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2018-11-10 06:02:07,406 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:02:07,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:02:07 BoogieIcfgContainer [2018-11-10 06:02:07,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:02:07,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:02:07,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:02:07,411 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:02:07,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:02:06" (1/3) ... [2018-11-10 06:02:07,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:02:07, skipping insertion in model container [2018-11-10 06:02:07,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:06" (2/3) ... [2018-11-10 06:02:07,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:02:07, skipping insertion in model container [2018-11-10 06:02:07,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:02:07" (3/3) ... [2018-11-10 06:02:07,414 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 06:02:07,423 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:02:07,431 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 06:02:07,444 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 06:02:07,474 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:02:07,475 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 06:02:07,475 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:02:07,475 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:02:07,475 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:02:07,475 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:02:07,475 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:02:07,476 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:02:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-11-10 06:02:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 06:02:07,500 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:07,500 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:07,502 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:07,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:07,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1961472673, now seen corresponding path program 1 times [2018-11-10 06:02:07,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:07,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:07,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:07,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:07,553 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:07,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:07,736 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:07,737 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-11-10 06:02:07,740 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [67], [68], [69], [71], [73], [75], [78], [91], [196], [199], [201], [207], [210], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:07,786 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:07,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:07,904 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:07,943 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 06:02:07,944 INFO L272 AbstractInterpreter]: Visited 19 different actions 27 times. Never merged. Never widened. Never found a fixpoint. Largest state had 29 variables. [2018-11-10 06:02:07,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:07,951 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 06:02:08,084 INFO L227 lantSequenceWeakener]: Weakened 16 states. On average, predicates are now at 71.56% of their original sizes. [2018-11-10 06:02:08,085 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 06:02:08,372 INFO L415 sIntCurrentIteration]: We unified 35 AI predicates to 35 [2018-11-10 06:02:08,372 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 06:02:08,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 06:02:08,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2018-11-10 06:02:08,373 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:08,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 06:02:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 06:02:08,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-10 06:02:08,385 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 14 states. [2018-11-10 06:02:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:10,214 INFO L93 Difference]: Finished difference Result 228 states and 370 transitions. [2018-11-10 06:02:10,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 06:02:10,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-11-10 06:02:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:10,229 INFO L225 Difference]: With dead ends: 228 [2018-11-10 06:02:10,229 INFO L226 Difference]: Without dead ends: 144 [2018-11-10 06:02:10,233 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2018-11-10 06:02:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-10 06:02:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 132. [2018-11-10 06:02:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-10 06:02:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 185 transitions. [2018-11-10 06:02:10,292 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 185 transitions. Word has length 36 [2018-11-10 06:02:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:10,293 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 185 transitions. [2018-11-10 06:02:10,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 06:02:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 185 transitions. [2018-11-10 06:02:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 06:02:10,295 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:10,296 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:10,297 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:10,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2051816065, now seen corresponding path program 1 times [2018-11-10 06:02:10,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:10,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:10,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:10,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:10,299 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:10,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:10,419 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:10,419 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 41 with the following transitions: [2018-11-10 06:02:10,419 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [67], [68], [69], [71], [73], [75], [80], [85], [87], [93], [98], [100], [196], [199], [201], [207], [210], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:10,421 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:10,421 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:10,429 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:10,446 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 06:02:10,447 INFO L272 AbstractInterpreter]: Visited 27 different actions 35 times. Never merged. Never widened. Never found a fixpoint. Largest state had 29 variables. [2018-11-10 06:02:10,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:10,449 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 06:02:10,506 INFO L227 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 66.21% of their original sizes. [2018-11-10 06:02:10,506 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 06:02:10,731 INFO L415 sIntCurrentIteration]: We unified 39 AI predicates to 39 [2018-11-10 06:02:10,731 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 06:02:10,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 06:02:10,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [9] total 26 [2018-11-10 06:02:10,731 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:10,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 06:02:10,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 06:02:10,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-11-10 06:02:10,733 INFO L87 Difference]: Start difference. First operand 132 states and 185 transitions. Second operand 19 states. [2018-11-10 06:02:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:12,789 INFO L93 Difference]: Finished difference Result 189 states and 266 transitions. [2018-11-10 06:02:12,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 06:02:12,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2018-11-10 06:02:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:12,791 INFO L225 Difference]: With dead ends: 189 [2018-11-10 06:02:12,791 INFO L226 Difference]: Without dead ends: 150 [2018-11-10 06:02:12,792 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2018-11-10 06:02:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-11-10 06:02:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2018-11-10 06:02:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-10 06:02:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 190 transitions. [2018-11-10 06:02:12,808 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 190 transitions. Word has length 40 [2018-11-10 06:02:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:12,809 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 190 transitions. [2018-11-10 06:02:12,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 06:02:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 190 transitions. [2018-11-10 06:02:12,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:12,810 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:12,811 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:12,811 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:12,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:12,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1027989336, now seen corresponding path program 1 times [2018-11-10 06:02:12,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:12,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:12,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:12,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:12,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:12,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:12,926 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:12,926 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-10 06:02:12,927 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [9], [39], [43], [49], [53], [59], [67], [68], [69], [71], [73], [75], [80], [85], [87], [93], [96], [100], [196], [199], [201], [207], [210], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:12,928 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:12,929 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:12,934 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:12,997 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 06:02:12,997 INFO L272 AbstractInterpreter]: Visited 34 different actions 91 times. Merged at 13 different actions 28 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-11-10 06:02:13,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:13,001 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 06:02:13,075 INFO L227 lantSequenceWeakener]: Weakened 29 states. On average, predicates are now at 63.2% of their original sizes. [2018-11-10 06:02:13,075 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 06:02:13,510 INFO L415 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2018-11-10 06:02:13,510 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 06:02:13,510 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 06:02:13,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [9] total 32 [2018-11-10 06:02:13,511 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:13,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 06:02:13,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 06:02:13,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2018-11-10 06:02:13,512 INFO L87 Difference]: Start difference. First operand 138 states and 190 transitions. Second operand 25 states. [2018-11-10 06:02:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:18,111 INFO L93 Difference]: Finished difference Result 378 states and 573 transitions. [2018-11-10 06:02:18,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 06:02:18,111 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2018-11-10 06:02:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:18,114 INFO L225 Difference]: With dead ends: 378 [2018-11-10 06:02:18,114 INFO L226 Difference]: Without dead ends: 326 [2018-11-10 06:02:18,115 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 06:02:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-11-10 06:02:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 170. [2018-11-10 06:02:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-11-10 06:02:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 236 transitions. [2018-11-10 06:02:18,144 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 236 transitions. Word has length 45 [2018-11-10 06:02:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:18,144 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 236 transitions. [2018-11-10 06:02:18,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 06:02:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 236 transitions. [2018-11-10 06:02:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:18,146 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:18,146 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:18,146 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:18,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1677465580, now seen corresponding path program 1 times [2018-11-10 06:02:18,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:18,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:18,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:18,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:18,148 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:18,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:18,285 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:18,285 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-10 06:02:18,285 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [9], [39], [43], [49], [55], [65], [67], [68], [69], [71], [73], [75], [80], [85], [87], [93], [96], [100], [196], [199], [201], [207], [210], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:18,287 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:18,287 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:18,293 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:18,351 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:02:18,351 INFO L272 AbstractInterpreter]: Visited 38 different actions 98 times. Merged at 13 different actions 31 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-11-10 06:02:18,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:18,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:02:18,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:18,354 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:18,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:18,363 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:02:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:18,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 06:02:18,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:18,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:02:18,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2018-11-10 06:02:18,675 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:02:18,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 06:02:18,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 06:02:18,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-11-10 06:02:18,679 INFO L87 Difference]: Start difference. First operand 170 states and 236 transitions. Second operand 11 states. [2018-11-10 06:02:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:19,178 INFO L93 Difference]: Finished difference Result 279 states and 396 transitions. [2018-11-10 06:02:19,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 06:02:19,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2018-11-10 06:02:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:19,182 INFO L225 Difference]: With dead ends: 279 [2018-11-10 06:02:19,182 INFO L226 Difference]: Without dead ends: 241 [2018-11-10 06:02:19,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2018-11-10 06:02:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-11-10 06:02:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 184. [2018-11-10 06:02:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-10 06:02:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-11-10 06:02:19,221 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 45 [2018-11-10 06:02:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:19,222 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-11-10 06:02:19,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 06:02:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-11-10 06:02:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:19,223 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:19,224 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:19,224 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:19,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1734723882, now seen corresponding path program 1 times [2018-11-10 06:02:19,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:19,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:19,225 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:19,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:19,395 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:19,395 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-10 06:02:19,395 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [9], [39], [43], [49], [55], [65], [67], [68], [69], [71], [73], [75], [80], [85], [87], [93], [96], [100], [196], [199], [201], [207], [212], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:19,397 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:19,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:19,403 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:19,486 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:02:19,487 INFO L272 AbstractInterpreter]: Visited 38 different actions 102 times. Merged at 13 different actions 31 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-11-10 06:02:19,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:19,495 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:02:19,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:19,495 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:19,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:19,515 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:02:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:19,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 06:02:19,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:19,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:02:19,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 19 [2018-11-10 06:02:19,848 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:02:19,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:02:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:02:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-11-10 06:02:19,849 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 12 states. [2018-11-10 06:02:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:20,449 INFO L93 Difference]: Finished difference Result 275 states and 387 transitions. [2018-11-10 06:02:20,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 06:02:20,450 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-10 06:02:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:20,451 INFO L225 Difference]: With dead ends: 275 [2018-11-10 06:02:20,452 INFO L226 Difference]: Without dead ends: 237 [2018-11-10 06:02:20,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2018-11-10 06:02:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-11-10 06:02:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2018-11-10 06:02:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-11-10 06:02:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 226 transitions. [2018-11-10 06:02:20,480 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 226 transitions. Word has length 45 [2018-11-10 06:02:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:20,480 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 226 transitions. [2018-11-10 06:02:20,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:02:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 226 transitions. [2018-11-10 06:02:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:20,481 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:20,481 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:20,482 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:20,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash -114635204, now seen corresponding path program 1 times [2018-11-10 06:02:20,482 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:20,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:20,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:20,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:20,483 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:20,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:20,585 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:20,585 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-10 06:02:20,585 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [9], [39], [43], [49], [53], [59], [67], [68], [69], [71], [73], [75], [80], [83], [87], [93], [96], [100], [196], [199], [201], [207], [210], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:20,586 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:20,587 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:20,592 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:20,654 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:02:20,654 INFO L272 AbstractInterpreter]: Visited 38 different actions 87 times. Merged at 11 different actions 23 times. Never widened. Never found a fixpoint. Largest state had 29 variables. [2018-11-10 06:02:20,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:20,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:02:20,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:20,656 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:20,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:20,668 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:02:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:20,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 06:02:20,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:20,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:02:20,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 18 [2018-11-10 06:02:20,994 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:20,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:02:20,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:02:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2018-11-10 06:02:20,995 INFO L87 Difference]: Start difference. First operand 162 states and 226 transitions. Second operand 6 states. [2018-11-10 06:02:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:21,087 INFO L93 Difference]: Finished difference Result 296 states and 430 transitions. [2018-11-10 06:02:21,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:02:21,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2018-11-10 06:02:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:21,089 INFO L225 Difference]: With dead ends: 296 [2018-11-10 06:02:21,089 INFO L226 Difference]: Without dead ends: 224 [2018-11-10 06:02:21,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2018-11-10 06:02:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-11-10 06:02:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 202. [2018-11-10 06:02:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-10 06:02:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 284 transitions. [2018-11-10 06:02:21,115 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 284 transitions. Word has length 45 [2018-11-10 06:02:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:21,116 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 284 transitions. [2018-11-10 06:02:21,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:02:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 284 transitions. [2018-11-10 06:02:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:21,117 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:21,118 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:21,118 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:21,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash -507662214, now seen corresponding path program 1 times [2018-11-10 06:02:21,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:21,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:21,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,120 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:21,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:21,198 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:21,198 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-10 06:02:21,199 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [9], [39], [43], [49], [53], [59], [67], [68], [69], [71], [73], [75], [80], [83], [87], [93], [98], [100], [196], [199], [201], [207], [210], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:21,200 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:21,200 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:21,204 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:21,251 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:02:21,251 INFO L272 AbstractInterpreter]: Visited 38 different actions 91 times. Merged at 13 different actions 25 times. Never widened. Never found a fixpoint. Largest state had 29 variables. [2018-11-10 06:02:21,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:21,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:02:21,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:21,257 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:21,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:21,275 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:02:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:21,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 06:02:21,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:21,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:02:21,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 10] total 22 [2018-11-10 06:02:21,549 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:21,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:02:21,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:02:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2018-11-10 06:02:21,550 INFO L87 Difference]: Start difference. First operand 202 states and 284 transitions. Second operand 8 states. [2018-11-10 06:02:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:21,698 INFO L93 Difference]: Finished difference Result 283 states and 399 transitions. [2018-11-10 06:02:21,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 06:02:21,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2018-11-10 06:02:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:21,700 INFO L225 Difference]: With dead ends: 283 [2018-11-10 06:02:21,701 INFO L226 Difference]: Without dead ends: 221 [2018-11-10 06:02:21,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2018-11-10 06:02:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-11-10 06:02:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 203. [2018-11-10 06:02:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-10 06:02:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 283 transitions. [2018-11-10 06:02:21,723 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 283 transitions. Word has length 45 [2018-11-10 06:02:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:21,723 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 283 transitions. [2018-11-10 06:02:21,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:02:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 283 transitions. [2018-11-10 06:02:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 06:02:21,724 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:21,724 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:21,724 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:21,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1603060171, now seen corresponding path program 1 times [2018-11-10 06:02:21,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:21,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:21,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,726 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:21,748 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:21,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:02:21,748 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:21,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:02:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:02:21,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:02:21,749 INFO L87 Difference]: Start difference. First operand 203 states and 283 transitions. Second operand 4 states. [2018-11-10 06:02:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:21,794 INFO L93 Difference]: Finished difference Result 321 states and 462 transitions. [2018-11-10 06:02:21,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:02:21,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2018-11-10 06:02:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:21,796 INFO L225 Difference]: With dead ends: 321 [2018-11-10 06:02:21,796 INFO L226 Difference]: Without dead ends: 255 [2018-11-10 06:02:21,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-11-10 06:02:21,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 211. [2018-11-10 06:02:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-10 06:02:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 288 transitions. [2018-11-10 06:02:21,818 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 288 transitions. Word has length 49 [2018-11-10 06:02:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:21,818 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 288 transitions. [2018-11-10 06:02:21,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:02:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 288 transitions. [2018-11-10 06:02:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:21,819 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:21,819 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:21,820 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:21,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:21,820 INFO L82 PathProgramCache]: Analyzing trace with hash -798254347, now seen corresponding path program 1 times [2018-11-10 06:02:21,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:21,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:21,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,821 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:21,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:21,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:02:21,858 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:21,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:02:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:02:21,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:02:21,859 INFO L87 Difference]: Start difference. First operand 211 states and 288 transitions. Second operand 4 states. [2018-11-10 06:02:21,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:21,894 INFO L93 Difference]: Finished difference Result 228 states and 309 transitions. [2018-11-10 06:02:21,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 06:02:21,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2018-11-10 06:02:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:21,895 INFO L225 Difference]: With dead ends: 228 [2018-11-10 06:02:21,896 INFO L226 Difference]: Without dead ends: 221 [2018-11-10 06:02:21,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-11-10 06:02:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2018-11-10 06:02:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-11-10 06:02:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 292 transitions. [2018-11-10 06:02:21,921 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 292 transitions. Word has length 50 [2018-11-10 06:02:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:21,921 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 292 transitions. [2018-11-10 06:02:21,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:02:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 292 transitions. [2018-11-10 06:02:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:21,922 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:21,922 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:21,923 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:21,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash 976753015, now seen corresponding path program 1 times [2018-11-10 06:02:21,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:21,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:21,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:21,924 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:21,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:21,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:02:21,959 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:21,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:02:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:02:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:21,960 INFO L87 Difference]: Start difference. First operand 215 states and 292 transitions. Second operand 5 states. [2018-11-10 06:02:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:22,004 INFO L93 Difference]: Finished difference Result 222 states and 298 transitions. [2018-11-10 06:02:22,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:02:22,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2018-11-10 06:02:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:22,007 INFO L225 Difference]: With dead ends: 222 [2018-11-10 06:02:22,007 INFO L226 Difference]: Without dead ends: 215 [2018-11-10 06:02:22,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:02:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-11-10 06:02:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2018-11-10 06:02:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-10 06:02:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 285 transitions. [2018-11-10 06:02:22,035 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 285 transitions. Word has length 50 [2018-11-10 06:02:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:22,035 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 285 transitions. [2018-11-10 06:02:22,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:02:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 285 transitions. [2018-11-10 06:02:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:22,036 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:22,036 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:22,037 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:22,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1441674635, now seen corresponding path program 2 times [2018-11-10 06:02:22,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:22,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:22,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:22,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:22,038 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:02:22,210 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:22,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-11-10 06:02:22,210 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:02:22,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 06:02:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 06:02:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:02:22,211 INFO L87 Difference]: Start difference. First operand 211 states and 285 transitions. Second operand 13 states. [2018-11-10 06:02:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:22,534 INFO L93 Difference]: Finished difference Result 368 states and 506 transitions. [2018-11-10 06:02:22,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 06:02:22,535 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2018-11-10 06:02:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:22,537 INFO L225 Difference]: With dead ends: 368 [2018-11-10 06:02:22,537 INFO L226 Difference]: Without dead ends: 293 [2018-11-10 06:02:22,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-11-10 06:02:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-11-10 06:02:22,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 280. [2018-11-10 06:02:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-11-10 06:02:22,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 374 transitions. [2018-11-10 06:02:22,571 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 374 transitions. Word has length 50 [2018-11-10 06:02:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:22,571 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 374 transitions. [2018-11-10 06:02:22,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 06:02:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 374 transitions. [2018-11-10 06:02:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:22,572 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:22,572 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:22,572 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:22,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash -147837745, now seen corresponding path program 1 times [2018-11-10 06:02:22,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:22,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:22,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:02:22,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:22,574 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:22,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:22,646 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:02:22,646 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-11-10 06:02:22,647 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [9], [39], [43], [49], [53], [55], [59], [65], [67], [68], [69], [71], [73], [75], [80], [83], [87], [93], [96], [100], [196], [199], [201], [207], [210], [218], [242], [243], [244], [246], [247], [248], [249], [250], [251], [252], [260] [2018-11-10 06:02:22,648 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:02:22,648 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:02:22,655 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:02:22,727 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:02:22,728 INFO L272 AbstractInterpreter]: Visited 40 different actions 132 times. Merged at 12 different actions 49 times. Never widened. Found 3 fixpoints after 1 different actions. Largest state had 29 variables. [2018-11-10 06:02:22,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:22,741 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:02:22,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:22,741 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:22,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:22,752 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:02:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:22,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:22,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:23,038 WARN L832 $PredicateComparison]: unable to prove that (forall ((main_~b~0 Int)) (<= (mod main_~b~0 4294967296) (mod c_main_~a~0 4294967296))) is different from false [2018-11-10 06:02:23,257 WARN L832 $PredicateComparison]: unable to prove that (forall ((main_~b~0 Int)) (<= (mod main_~b~0 4294967296) (mod |c_main_#t~ret5| 4294967296))) is different from false [2018-11-10 06:02:23,486 WARN L832 $PredicateComparison]: unable to prove that (forall ((main_~b~0 Int)) (<= (mod main_~b~0 4294967296) (mod |c_base2flt_#res| 4294967296))) is different from false [2018-11-10 06:02:23,707 WARN L832 $PredicateComparison]: unable to prove that (forall ((main_~b~0 Int)) (<= (mod main_~b~0 4294967296) (mod c_base2flt_~__retres4~0 4294967296))) is different from false [2018-11-10 06:02:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:23,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:02:23,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2018-11-10 06:02:23,731 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:02:23,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:02:23,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:02:23,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=75, Unknown=4, NotChecked=76, Total=182 [2018-11-10 06:02:23,732 INFO L87 Difference]: Start difference. First operand 280 states and 374 transitions. Second operand 8 states. [2018-11-10 06:02:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:23,860 INFO L93 Difference]: Finished difference Result 356 states and 473 transitions. [2018-11-10 06:02:23,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:02:23,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2018-11-10 06:02:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:23,861 INFO L225 Difference]: With dead ends: 356 [2018-11-10 06:02:23,862 INFO L226 Difference]: Without dead ends: 315 [2018-11-10 06:02:23,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=107, Unknown=4, NotChecked=92, Total=240 [2018-11-10 06:02:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-11-10 06:02:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 305. [2018-11-10 06:02:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-11-10 06:02:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 402 transitions. [2018-11-10 06:02:23,889 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 402 transitions. Word has length 50 [2018-11-10 06:02:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:23,890 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 402 transitions. [2018-11-10 06:02:23,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:02:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 402 transitions. [2018-11-10 06:02:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:23,890 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:23,891 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:23,891 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:23,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash -90579443, now seen corresponding path program 1 times [2018-11-10 06:02:23,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:02:23,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:23,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:23,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:02:23,892 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:02:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:02:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:02:23,921 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 06:02:23,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 06:02:23 BoogieIcfgContainer [2018-11-10 06:02:23,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 06:02:23,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 06:02:23,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 06:02:23,947 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 06:02:23,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:02:07" (3/4) ... [2018-11-10 06:02:23,953 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 06:02:23,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 06:02:23,953 INFO L168 Benchmark]: Toolchain (without parser) took 17268.82 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 482.3 MB). Free memory was 958.1 MB in the beginning and 1.2 GB in the end (delta: -249.6 MB). Peak memory consumption was 232.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:02:23,954 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:02:23,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.80 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 942.0 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 06:02:23,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.75 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:02:23,956 INFO L168 Benchmark]: Boogie Preprocessor took 68.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.9 MB). Free memory was 942.0 MB in the beginning and 1.2 GB in the end (delta: -223.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-10 06:02:23,956 INFO L168 Benchmark]: RCFGBuilder took 386.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 11.5 GB. [2018-11-10 06:02:23,956 INFO L168 Benchmark]: TraceAbstraction took 16539.19 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 311.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -72.9 MB). Peak memory consumption was 238.6 MB. Max. memory is 11.5 GB. [2018-11-10 06:02:23,957 INFO L168 Benchmark]: Witness Printer took 5.69 ms. Allocated memory is still 1.5 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:02:23,961 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 243.80 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 942.0 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.75 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 68.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.9 MB). Free memory was 942.0 MB in the beginning and 1.2 GB in the end (delta: -223.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 386.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16539.19 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 311.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -72.9 MB). Peak memory consumption was 238.6 MB. Max. memory is 11.5 GB. * Witness Printer took 5.69 ms. Allocated memory is still 1.5 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 100, overapproximation of bitwiseAnd at line 98. Possible FailurePath: [L215] unsigned int a ; [L216] unsigned int ma = __VERIFIER_nondet_uint(); [L217] signed char ea = __VERIFIER_nondet_char(); [L218] unsigned int b ; [L219] unsigned int mb = __VERIFIER_nondet_uint(); [L220] signed char eb = __VERIFIER_nondet_char(); [L221] unsigned int r_add ; [L222] unsigned int zero ; [L223] int sa ; [L224] int sb ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int tmp___1 ; [L228] int tmp___2 ; [L229] int tmp___3 ; [L230] int tmp___4 ; [L231] int tmp___5 ; [L232] int tmp___6 ; [L233] int tmp___7 ; [L234] int tmp___8 ; [L235] int tmp___9 ; [L236] int __retres23 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L240] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L19] COND TRUE ! m [L20] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L70] RET return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L240] EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=0, ma=33554432, mb=16777216] [L240] zero = base2flt(0, 0) [L241] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L70] RET return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L241] EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L241] a = base2flt(ma, ea) [L242] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L19] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L47] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L66] m = m & ~ (1U << 24U) [L67] res = m | (unsigned int )((e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=4278190080, e=0, res=4278190080] [L70] RET return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-36028797035741184, __retres4=4278190080, e=0, res=4278190080] [L242] EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-36028797035741184, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L242] b = base2flt(mb, eb) [L244] COND FALSE !(a < zero) VAL [a=4294967295, b=4278190080, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L247] COND TRUE a > zero [L248] tmp = 1 VAL [a=4294967295, b=4278190080, ea=127, eb=0, ma=33554432, mb=16777216, tmp=1, zero=0] [L252] sa = tmp VAL [a=4294967295, b=4278190080, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L254] COND FALSE !(b < zero) VAL [a=4294967295, b=4278190080, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L257] COND TRUE b > zero [L258] tmp___0 = 1 VAL [a=4294967295, b=4278190080, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L262] sb = tmp___0 VAL [a=4294967295, b=4278190080, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L265] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4278190080] [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080, ea=127, eb=2147483519] [L104] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 79 locations, 1 error locations. UNSAFE Result, 16.4s OverallTime, 13 OverallIterations, 3 TraceHistogramMax, 10.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1365 SDtfs, 1654 SDslu, 9601 SDs, 0 SdLazy, 1484 SolverSat, 236 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 716 GetRequests, 490 SyntacticMatches, 4 SemanticMatches, 222 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=305occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s AbstIntTime, 8 AbstIntIterations, 3 AbstIntStrong, 0.8936781609195407 AbsIntWeakeningRatio, 1.8898305084745763 AbsIntAvgWeakeningVarsNumRemoved, 20.440677966101696 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 429 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 830 NumberOfCodeBlocks, 830 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 988 ConstructedInterpolants, 51 QuantifiedInterpolants, 125482 SizeOfPredicates, 24 NumberOfNonLiveVariables, 655 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 270/347 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:02:25,576 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:02:25,578 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:02:25,586 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:02:25,586 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:02:25,587 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:02:25,588 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:02:25,589 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:02:25,590 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:02:25,591 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:02:25,592 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:02:25,592 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:02:25,593 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:02:25,594 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:02:25,595 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:02:25,595 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:02:25,596 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:02:25,598 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:02:25,600 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:02:25,601 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:02:25,602 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:02:25,603 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:02:25,606 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:02:25,606 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:02:25,606 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:02:25,607 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:02:25,608 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:02:25,608 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:02:25,610 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:02:25,610 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:02:25,611 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:02:25,611 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:02:25,611 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:02:25,612 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:02:25,612 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:02:25,612 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:02:25,613 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-10 06:02:25,625 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:02:25,626 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:02:25,626 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:02:25,626 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 06:02:25,627 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 06:02:25,627 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 06:02:25,627 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 06:02:25,627 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 06:02:25,627 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:02:25,628 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:02:25,628 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:02:25,628 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:02:25,628 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 06:02:25,628 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:02:25,628 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 06:02:25,628 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 06:02:25,629 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 06:02:25,629 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:02:25,630 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 06:02:25,631 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 06:02:25,631 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:02:25,631 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:02:25,631 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:02:25,631 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:02:25,631 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:02:25,631 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:02:25,632 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:02:25,632 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 06:02:25,632 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-10 06:02:25,632 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:02:25,632 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 06:02:25,632 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 06:02:25,632 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_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/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 -> f756365182c9801d4a2ac186a40692687a86b469 [2018-11-10 06:02:25,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:02:25,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:02:25,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:02:25,681 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:02:25,681 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:02:25,681 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 06:02:25,723 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/2a2f02c35/5c51e4b276094baaa45e4bcf8bdd2554/FLAG98370b2bd [2018-11-10 06:02:26,084 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:02:26,084 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 06:02:26,091 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/2a2f02c35/5c51e4b276094baaa45e4bcf8bdd2554/FLAG98370b2bd [2018-11-10 06:02:26,101 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/data/2a2f02c35/5c51e4b276094baaa45e4bcf8bdd2554 [2018-11-10 06:02:26,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:02:26,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 06:02:26,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:02:26,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:02:26,109 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:02:26,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145650f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26, skipping insertion in model container [2018-11-10 06:02:26,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:02:26,143 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:02:26,307 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:02:26,311 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:02:26,356 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:02:26,368 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:02:26,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26 WrapperNode [2018-11-10 06:02:26,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:02:26,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 06:02:26,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 06:02:26,370 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 06:02:26,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 06:02:26,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:02:26,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:02:26,390 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:02:26,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... [2018-11-10 06:02:26,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:02:26,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:02:26,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:02:26,422 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:02:26,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/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 [2018-11-10 06:02:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:02:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:02:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:02:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:02:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2018-11-10 06:02:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2018-11-10 06:02:26,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:02:26,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:02:26,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 06:02:26,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 06:02:26,533 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2018-11-10 06:02:26,533 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2018-11-10 06:02:26,843 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:02:26,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:02:26 BoogieIcfgContainer [2018-11-10 06:02:26,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:02:26,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:02:26,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:02:26,847 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:02:26,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:02:26" (1/3) ... [2018-11-10 06:02:26,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b356c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:02:26, skipping insertion in model container [2018-11-10 06:02:26,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:02:26" (2/3) ... [2018-11-10 06:02:26,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b356c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:02:26, skipping insertion in model container [2018-11-10 06:02:26,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:02:26" (3/3) ... [2018-11-10 06:02:26,851 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 06:02:26,860 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:02:26,868 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 06:02:26,880 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 06:02:26,902 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 06:02:26,902 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:02:26,902 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 06:02:26,902 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:02:26,902 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:02:26,902 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:02:26,903 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:02:26,903 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:02:26,903 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:02:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-11-10 06:02:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 06:02:26,922 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:26,923 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:26,925 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:26,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:26,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1961472673, now seen corresponding path program 1 times [2018-11-10 06:02:26,931 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:26,932 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:26,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:27,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:27,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:27,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:27,168 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:27,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:27,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:27,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:27,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 06:02:27,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 9 [2018-11-10 06:02:27,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 06:02:27,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 06:02:27,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 06:02:27,313 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 9 states. [2018-11-10 06:02:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:27,612 INFO L93 Difference]: Finished difference Result 203 states and 322 transitions. [2018-11-10 06:02:27,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 06:02:27,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-11-10 06:02:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:27,627 INFO L225 Difference]: With dead ends: 203 [2018-11-10 06:02:27,627 INFO L226 Difference]: Without dead ends: 122 [2018-11-10 06:02:27,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:02:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-10 06:02:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2018-11-10 06:02:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-11-10 06:02:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 156 transitions. [2018-11-10 06:02:27,689 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 156 transitions. Word has length 36 [2018-11-10 06:02:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:27,690 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 156 transitions. [2018-11-10 06:02:27,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 06:02:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 156 transitions. [2018-11-10 06:02:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 06:02:27,693 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:27,693 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:27,694 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:27,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:27,694 INFO L82 PathProgramCache]: Analyzing trace with hash 343403292, now seen corresponding path program 1 times [2018-11-10 06:02:27,694 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:27,695 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:27,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:27,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:27,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:27,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:27,861 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:27,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:27,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 06:02:27,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:28,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 06:02:28,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10, 6] total 14 [2018-11-10 06:02:28,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 06:02:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 06:02:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-10 06:02:28,083 INFO L87 Difference]: Start difference. First operand 107 states and 156 transitions. Second operand 14 states. [2018-11-10 06:02:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:28,463 INFO L93 Difference]: Finished difference Result 346 states and 548 transitions. [2018-11-10 06:02:28,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 06:02:28,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2018-11-10 06:02:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:28,468 INFO L225 Difference]: With dead ends: 346 [2018-11-10 06:02:28,468 INFO L226 Difference]: Without dead ends: 276 [2018-11-10 06:02:28,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2018-11-10 06:02:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-11-10 06:02:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 158. [2018-11-10 06:02:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-10 06:02:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 239 transitions. [2018-11-10 06:02:28,489 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 239 transitions. Word has length 41 [2018-11-10 06:02:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:28,490 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 239 transitions. [2018-11-10 06:02:28,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 06:02:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 239 transitions. [2018-11-10 06:02:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:28,493 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:28,493 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:28,493 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:28,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash -114635204, now seen corresponding path program 1 times [2018-11-10 06:02:28,494 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:28,494 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:28,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:28,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:28,556 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:28,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:28,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:02:28,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:02:28,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:02:28,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:02:28,558 INFO L87 Difference]: Start difference. First operand 158 states and 239 transitions. Second operand 6 states. [2018-11-10 06:02:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:28,643 INFO L93 Difference]: Finished difference Result 330 states and 497 transitions. [2018-11-10 06:02:28,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:02:28,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2018-11-10 06:02:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:28,647 INFO L225 Difference]: With dead ends: 330 [2018-11-10 06:02:28,647 INFO L226 Difference]: Without dead ends: 248 [2018-11-10 06:02:28,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:02:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-11-10 06:02:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-11-10 06:02:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-10 06:02:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 362 transitions. [2018-11-10 06:02:28,668 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 362 transitions. Word has length 45 [2018-11-10 06:02:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:28,668 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 362 transitions. [2018-11-10 06:02:28,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:02:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 362 transitions. [2018-11-10 06:02:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:28,672 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:28,672 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:28,672 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:28,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash -507662214, now seen corresponding path program 1 times [2018-11-10 06:02:28,673 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:28,674 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:28,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:28,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:28,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:28,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:28,804 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/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 [2018-11-10 06:02:28,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:28,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 06:02:28,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:29,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:02:29,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 12] total 18 [2018-11-10 06:02:29,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 06:02:29,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 06:02:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-11-10 06:02:29,065 INFO L87 Difference]: Start difference. First operand 244 states and 362 transitions. Second operand 18 states. [2018-11-10 06:02:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:29,741 INFO L93 Difference]: Finished difference Result 393 states and 579 transitions. [2018-11-10 06:02:29,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 06:02:29,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2018-11-10 06:02:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:29,744 INFO L225 Difference]: With dead ends: 393 [2018-11-10 06:02:29,744 INFO L226 Difference]: Without dead ends: 303 [2018-11-10 06:02:29,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2018-11-10 06:02:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-11-10 06:02:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 282. [2018-11-10 06:02:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-10 06:02:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 408 transitions. [2018-11-10 06:02:29,764 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 408 transitions. Word has length 45 [2018-11-10 06:02:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:29,764 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 408 transitions. [2018-11-10 06:02:29,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 06:02:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 408 transitions. [2018-11-10 06:02:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 06:02:29,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:29,767 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:29,768 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:29,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1658942964, now seen corresponding path program 1 times [2018-11-10 06:02:29,768 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:29,768 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:29,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:29,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:29,831 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:29,833 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:29,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 06:02:29,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:02:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:02:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:02:29,833 INFO L87 Difference]: Start difference. First operand 282 states and 408 transitions. Second operand 8 states. [2018-11-10 06:02:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:29,945 INFO L93 Difference]: Finished difference Result 323 states and 463 transitions. [2018-11-10 06:02:29,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 06:02:29,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2018-11-10 06:02:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:29,947 INFO L225 Difference]: With dead ends: 323 [2018-11-10 06:02:29,947 INFO L226 Difference]: Without dead ends: 285 [2018-11-10 06:02:29,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 06:02:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-11-10 06:02:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 275. [2018-11-10 06:02:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-11-10 06:02:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 395 transitions. [2018-11-10 06:02:29,966 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 395 transitions. Word has length 45 [2018-11-10 06:02:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:29,967 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 395 transitions. [2018-11-10 06:02:29,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:02:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 395 transitions. [2018-11-10 06:02:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 06:02:29,968 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:29,968 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:29,969 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:29,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:29,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1603060171, now seen corresponding path program 1 times [2018-11-10 06:02:29,969 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:29,969 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:29,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:30,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:30,043 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:30,045 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:30,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-10 06:02:30,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 06:02:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 06:02:30,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:02:30,046 INFO L87 Difference]: Start difference. First operand 275 states and 395 transitions. Second operand 7 states. [2018-11-10 06:02:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:30,220 INFO L93 Difference]: Finished difference Result 419 states and 614 transitions. [2018-11-10 06:02:30,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 06:02:30,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2018-11-10 06:02:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:30,224 INFO L225 Difference]: With dead ends: 419 [2018-11-10 06:02:30,224 INFO L226 Difference]: Without dead ends: 347 [2018-11-10 06:02:30,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-10 06:02:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-11-10 06:02:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 247. [2018-11-10 06:02:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-11-10 06:02:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 355 transitions. [2018-11-10 06:02:30,241 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 355 transitions. Word has length 49 [2018-11-10 06:02:30,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:30,242 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 355 transitions. [2018-11-10 06:02:30,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 06:02:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 355 transitions. [2018-11-10 06:02:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 06:02:30,243 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:30,244 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:30,244 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:30,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1545801869, now seen corresponding path program 1 times [2018-11-10 06:02:30,244 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:30,244 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:30,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:30,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:30,310 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:30,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:30,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:02:30,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:02:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:02:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:02:30,313 INFO L87 Difference]: Start difference. First operand 247 states and 355 transitions. Second operand 4 states. [2018-11-10 06:02:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:30,346 INFO L93 Difference]: Finished difference Result 400 states and 588 transitions. [2018-11-10 06:02:30,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:02:30,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2018-11-10 06:02:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:30,349 INFO L225 Difference]: With dead ends: 400 [2018-11-10 06:02:30,349 INFO L226 Difference]: Without dead ends: 321 [2018-11-10 06:02:30,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-11-10 06:02:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 285. [2018-11-10 06:02:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-11-10 06:02:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 407 transitions. [2018-11-10 06:02:30,367 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 407 transitions. Word has length 49 [2018-11-10 06:02:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:30,368 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 407 transitions. [2018-11-10 06:02:30,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:02:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 407 transitions. [2018-11-10 06:02:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:30,369 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:30,369 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:30,370 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:30,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 976753015, now seen corresponding path program 1 times [2018-11-10 06:02:30,370 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:30,370 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:30,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:30,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:30,417 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:30,419 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:30,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:02:30,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:02:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:02:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:30,420 INFO L87 Difference]: Start difference. First operand 285 states and 407 transitions. Second operand 5 states. [2018-11-10 06:02:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:30,458 INFO L93 Difference]: Finished difference Result 292 states and 413 transitions. [2018-11-10 06:02:30,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:02:30,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2018-11-10 06:02:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:30,461 INFO L225 Difference]: With dead ends: 292 [2018-11-10 06:02:30,461 INFO L226 Difference]: Without dead ends: 285 [2018-11-10 06:02:30,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:02:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-11-10 06:02:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-11-10 06:02:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-11-10 06:02:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 404 transitions. [2018-11-10 06:02:30,480 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 404 transitions. Word has length 50 [2018-11-10 06:02:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:30,480 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 404 transitions. [2018-11-10 06:02:30,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:02:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 404 transitions. [2018-11-10 06:02:30,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:30,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:30,482 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:30,482 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:30,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:30,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1498932937, now seen corresponding path program 1 times [2018-11-10 06:02:30,483 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:30,483 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:30,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:30,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:02:30,647 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:30,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:30,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-11-10 06:02:30,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 06:02:30,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 06:02:30,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:02:30,650 INFO L87 Difference]: Start difference. First operand 285 states and 404 transitions. Second operand 13 states. [2018-11-10 06:02:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:31,088 INFO L93 Difference]: Finished difference Result 490 states and 689 transitions. [2018-11-10 06:02:31,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 06:02:31,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2018-11-10 06:02:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:31,091 INFO L225 Difference]: With dead ends: 490 [2018-11-10 06:02:31,091 INFO L226 Difference]: Without dead ends: 424 [2018-11-10 06:02:31,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-11-10 06:02:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2018-11-10 06:02:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 360. [2018-11-10 06:02:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-11-10 06:02:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 502 transitions. [2018-11-10 06:02:31,120 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 502 transitions. Word has length 50 [2018-11-10 06:02:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:31,120 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 502 transitions. [2018-11-10 06:02:31,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 06:02:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 502 transitions. [2018-11-10 06:02:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:31,123 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:31,123 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:31,123 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:31,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:31,124 INFO L82 PathProgramCache]: Analyzing trace with hash -90579443, now seen corresponding path program 1 times [2018-11-10 06:02:31,124 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:31,124 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:31,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:31,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:31,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:31,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:31,532 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:31,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:31,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:31,578 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:31,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:02:31,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 06:02:31,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 06:02:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 06:02:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-11-10 06:02:31,620 INFO L87 Difference]: Start difference. First operand 360 states and 502 transitions. Second operand 11 states. [2018-11-10 06:02:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:32,070 INFO L93 Difference]: Finished difference Result 468 states and 642 transitions. [2018-11-10 06:02:32,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 06:02:32,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2018-11-10 06:02:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:32,073 INFO L225 Difference]: With dead ends: 468 [2018-11-10 06:02:32,073 INFO L226 Difference]: Without dead ends: 432 [2018-11-10 06:02:32,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2018-11-10 06:02:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2018-11-10 06:02:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 364. [2018-11-10 06:02:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-10 06:02:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 504 transitions. [2018-11-10 06:02:32,097 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 504 transitions. Word has length 50 [2018-11-10 06:02:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:32,098 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 504 transitions. [2018-11-10 06:02:32,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 06:02:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 504 transitions. [2018-11-10 06:02:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:32,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:32,099 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:32,099 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:32,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:32,100 INFO L82 PathProgramCache]: Analyzing trace with hash -473733425, now seen corresponding path program 1 times [2018-11-10 06:02:32,100 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:32,100 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:32,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:32,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:32,288 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:32,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:32,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 06:02:32,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:02:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:02:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 06:02:32,292 INFO L87 Difference]: Start difference. First operand 364 states and 504 transitions. Second operand 12 states. [2018-11-10 06:02:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:32,679 INFO L93 Difference]: Finished difference Result 602 states and 849 transitions. [2018-11-10 06:02:32,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 06:02:32,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2018-11-10 06:02:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:32,682 INFO L225 Difference]: With dead ends: 602 [2018-11-10 06:02:32,682 INFO L226 Difference]: Without dead ends: 501 [2018-11-10 06:02:32,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2018-11-10 06:02:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2018-11-10 06:02:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 458. [2018-11-10 06:02:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-11-10 06:02:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 632 transitions. [2018-11-10 06:02:32,702 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 632 transitions. Word has length 50 [2018-11-10 06:02:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:32,702 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 632 transitions. [2018-11-10 06:02:32,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:02:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 632 transitions. [2018-11-10 06:02:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:32,704 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:32,704 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:32,705 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:32,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2063245805, now seen corresponding path program 1 times [2018-11-10 06:02:32,705 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:32,705 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:32,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:32,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:02:32,826 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:32,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:32,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:02:32,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:02:32,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:02:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:02:32,828 INFO L87 Difference]: Start difference. First operand 458 states and 632 transitions. Second operand 6 states. [2018-11-10 06:02:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:36,335 INFO L93 Difference]: Finished difference Result 488 states and 669 transitions. [2018-11-10 06:02:36,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:02:36,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2018-11-10 06:02:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:36,338 INFO L225 Difference]: With dead ends: 488 [2018-11-10 06:02:36,338 INFO L226 Difference]: Without dead ends: 486 [2018-11-10 06:02:36,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:02:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2018-11-10 06:02:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 466. [2018-11-10 06:02:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2018-11-10 06:02:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 638 transitions. [2018-11-10 06:02:36,368 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 638 transitions. Word has length 50 [2018-11-10 06:02:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:36,368 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 638 transitions. [2018-11-10 06:02:36,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:02:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 638 transitions. [2018-11-10 06:02:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:36,371 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:36,372 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:36,372 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:36,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:36,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2005987503, now seen corresponding path program 1 times [2018-11-10 06:02:36,372 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:36,372 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:36,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:36,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:02:36,498 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:36,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:36,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:02:36,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:02:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:02:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:02:36,501 INFO L87 Difference]: Start difference. First operand 466 states and 638 transitions. Second operand 6 states. [2018-11-10 06:02:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:38,611 INFO L93 Difference]: Finished difference Result 472 states and 643 transitions. [2018-11-10 06:02:38,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:02:38,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2018-11-10 06:02:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:38,615 INFO L225 Difference]: With dead ends: 472 [2018-11-10 06:02:38,615 INFO L226 Difference]: Without dead ends: 470 [2018-11-10 06:02:38,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:02:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-11-10 06:02:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2018-11-10 06:02:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2018-11-10 06:02:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 641 transitions. [2018-11-10 06:02:38,643 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 641 transitions. Word has length 50 [2018-11-10 06:02:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:38,643 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 641 transitions. [2018-11-10 06:02:38,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:02:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 641 transitions. [2018-11-10 06:02:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 06:02:38,645 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:38,645 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:38,645 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:38,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash -175714166, now seen corresponding path program 1 times [2018-11-10 06:02:38,646 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:38,646 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:38,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:38,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 06:02:38,697 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:38,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:38,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:02:38,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:02:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:02:38,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:02:38,702 INFO L87 Difference]: Start difference. First operand 470 states and 641 transitions. Second operand 4 states. [2018-11-10 06:02:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:38,805 INFO L93 Difference]: Finished difference Result 857 states and 1155 transitions. [2018-11-10 06:02:38,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:02:38,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2018-11-10 06:02:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:38,808 INFO L225 Difference]: With dead ends: 857 [2018-11-10 06:02:38,808 INFO L226 Difference]: Without dead ends: 393 [2018-11-10 06:02:38,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-11-10 06:02:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 379. [2018-11-10 06:02:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-11-10 06:02:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 495 transitions. [2018-11-10 06:02:38,832 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 495 transitions. Word has length 50 [2018-11-10 06:02:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:38,833 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 495 transitions. [2018-11-10 06:02:38,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:02:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 495 transitions. [2018-11-10 06:02:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 06:02:38,834 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:38,834 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:38,835 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:38,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:38,835 INFO L82 PathProgramCache]: Analyzing trace with hash -110472862, now seen corresponding path program 1 times [2018-11-10 06:02:38,835 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:38,835 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:38,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:38,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:38,901 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:38,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:38,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:02:38,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:02:38,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:02:38,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:02:38,904 INFO L87 Difference]: Start difference. First operand 379 states and 495 transitions. Second operand 4 states. [2018-11-10 06:02:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:38,950 INFO L93 Difference]: Finished difference Result 396 states and 514 transitions. [2018-11-10 06:02:38,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 06:02:38,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-11-10 06:02:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:38,952 INFO L225 Difference]: With dead ends: 396 [2018-11-10 06:02:38,953 INFO L226 Difference]: Without dead ends: 343 [2018-11-10 06:02:38,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-11-10 06:02:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 335. [2018-11-10 06:02:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-10 06:02:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 427 transitions. [2018-11-10 06:02:38,973 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 427 transitions. Word has length 54 [2018-11-10 06:02:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:38,973 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 427 transitions. [2018-11-10 06:02:38,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:02:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 427 transitions. [2018-11-10 06:02:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 06:02:38,975 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:38,975 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:38,975 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:38,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash 934158746, now seen corresponding path program 1 times [2018-11-10 06:02:38,975 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:38,976 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:38,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:39,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:39,080 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:39,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:39,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:02:39,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:02:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:02:39,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:02:39,083 INFO L87 Difference]: Start difference. First operand 335 states and 427 transitions. Second operand 4 states. [2018-11-10 06:02:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:39,144 INFO L93 Difference]: Finished difference Result 502 states and 661 transitions. [2018-11-10 06:02:39,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:02:39,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-11-10 06:02:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:39,147 INFO L225 Difference]: With dead ends: 502 [2018-11-10 06:02:39,147 INFO L226 Difference]: Without dead ends: 397 [2018-11-10 06:02:39,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:02:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-11-10 06:02:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 333. [2018-11-10 06:02:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-11-10 06:02:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 428 transitions. [2018-11-10 06:02:39,169 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 428 transitions. Word has length 54 [2018-11-10 06:02:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:39,170 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 428 transitions. [2018-11-10 06:02:39,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:02:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 428 transitions. [2018-11-10 06:02:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 06:02:39,171 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:39,171 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:39,172 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:39,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:39,172 INFO L82 PathProgramCache]: Analyzing trace with hash -839747889, now seen corresponding path program 1 times [2018-11-10 06:02:39,172 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:39,172 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:39,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:39,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 06:02:39,371 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:39,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:39,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 06:02:39,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:02:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:02:39,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-10 06:02:39,375 INFO L87 Difference]: Start difference. First operand 333 states and 428 transitions. Second operand 12 states. [2018-11-10 06:02:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:39,875 INFO L93 Difference]: Finished difference Result 409 states and 535 transitions. [2018-11-10 06:02:39,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:02:39,876 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2018-11-10 06:02:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:39,877 INFO L225 Difference]: With dead ends: 409 [2018-11-10 06:02:39,877 INFO L226 Difference]: Without dead ends: 384 [2018-11-10 06:02:39,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-11-10 06:02:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2018-11-10 06:02:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 352. [2018-11-10 06:02:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-11-10 06:02:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 456 transitions. [2018-11-10 06:02:39,895 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 456 transitions. Word has length 57 [2018-11-10 06:02:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:39,896 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 456 transitions. [2018-11-10 06:02:39,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:02:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 456 transitions. [2018-11-10 06:02:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 06:02:39,897 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:39,897 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:39,897 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:39,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1539811347, now seen corresponding path program 1 times [2018-11-10 06:02:39,898 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:39,898 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:39,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:39,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:02:39,991 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:39,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:39,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 06:02:39,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:02:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:02:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:02:39,993 INFO L87 Difference]: Start difference. First operand 352 states and 456 transitions. Second operand 8 states. [2018-11-10 06:02:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:40,185 INFO L93 Difference]: Finished difference Result 427 states and 561 transitions. [2018-11-10 06:02:40,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:02:40,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2018-11-10 06:02:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:40,187 INFO L225 Difference]: With dead ends: 427 [2018-11-10 06:02:40,187 INFO L226 Difference]: Without dead ends: 408 [2018-11-10 06:02:40,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-10 06:02:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2018-11-10 06:02:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 357. [2018-11-10 06:02:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-11-10 06:02:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 471 transitions. [2018-11-10 06:02:40,208 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 471 transitions. Word has length 57 [2018-11-10 06:02:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:40,208 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 471 transitions. [2018-11-10 06:02:40,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:02:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 471 transitions. [2018-11-10 06:02:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 06:02:40,209 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:40,210 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:40,210 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:40,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:40,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1906564438, now seen corresponding path program 1 times [2018-11-10 06:02:40,210 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:40,210 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:40,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:40,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:02:40,370 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:40,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:40,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-11-10 06:02:40,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 06:02:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 06:02:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:02:40,372 INFO L87 Difference]: Start difference. First operand 357 states and 471 transitions. Second operand 13 states. [2018-11-10 06:02:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:40,683 INFO L93 Difference]: Finished difference Result 424 states and 555 transitions. [2018-11-10 06:02:40,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:02:40,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-11-10 06:02:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:40,686 INFO L225 Difference]: With dead ends: 424 [2018-11-10 06:02:40,686 INFO L226 Difference]: Without dead ends: 378 [2018-11-10 06:02:40,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-11-10 06:02:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-11-10 06:02:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 352. [2018-11-10 06:02:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-11-10 06:02:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 463 transitions. [2018-11-10 06:02:40,706 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 463 transitions. Word has length 58 [2018-11-10 06:02:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:40,706 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 463 transitions. [2018-11-10 06:02:40,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 06:02:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 463 transitions. [2018-11-10 06:02:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 06:02:40,708 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:40,708 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:40,708 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:40,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:40,708 INFO L82 PathProgramCache]: Analyzing trace with hash -941320722, now seen corresponding path program 1 times [2018-11-10 06:02:40,709 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:40,709 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:40,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:40,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:41,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:41,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:02:41,118 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:02:41,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:41,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:41,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:02:41,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:02:41,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 06:02:41,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 06:02:41,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 06:02:41,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-10 06:02:41,237 INFO L87 Difference]: Start difference. First operand 352 states and 463 transitions. Second operand 11 states. [2018-11-10 06:02:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:41,551 INFO L93 Difference]: Finished difference Result 408 states and 536 transitions. [2018-11-10 06:02:41,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 06:02:41,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2018-11-10 06:02:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:41,553 INFO L225 Difference]: With dead ends: 408 [2018-11-10 06:02:41,554 INFO L226 Difference]: Without dead ends: 374 [2018-11-10 06:02:41,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-10 06:02:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-11-10 06:02:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 350. [2018-11-10 06:02:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2018-11-10 06:02:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 459 transitions. [2018-11-10 06:02:41,576 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 459 transitions. Word has length 58 [2018-11-10 06:02:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:41,576 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 459 transitions. [2018-11-10 06:02:41,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 06:02:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 459 transitions. [2018-11-10 06:02:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 06:02:41,577 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:41,578 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:41,578 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:41,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash 786578608, now seen corresponding path program 1 times [2018-11-10 06:02:41,578 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:41,578 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:41,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:41,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 06:02:41,782 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:41,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:41,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 06:02:41,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:02:41,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:02:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-10 06:02:41,784 INFO L87 Difference]: Start difference. First operand 350 states and 459 transitions. Second operand 12 states. [2018-11-10 06:02:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:42,781 INFO L93 Difference]: Finished difference Result 431 states and 560 transitions. [2018-11-10 06:02:42,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 06:02:42,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2018-11-10 06:02:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:42,782 INFO L225 Difference]: With dead ends: 431 [2018-11-10 06:02:42,782 INFO L226 Difference]: Without dead ends: 384 [2018-11-10 06:02:42,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-11-10 06:02:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2018-11-10 06:02:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 348. [2018-11-10 06:02:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-10 06:02:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 455 transitions. [2018-11-10 06:02:42,796 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 455 transitions. Word has length 58 [2018-11-10 06:02:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:42,796 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 455 transitions. [2018-11-10 06:02:42,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:02:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 455 transitions. [2018-11-10 06:02:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 06:02:42,797 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:42,798 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:42,798 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:42,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:42,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1989898245, now seen corresponding path program 1 times [2018-11-10 06:02:42,798 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:42,798 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:42,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:42,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:02:42,863 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:42,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:42,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:02:42,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:02:42,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:02:42,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:02:42,865 INFO L87 Difference]: Start difference. First operand 348 states and 455 transitions. Second operand 6 states. [2018-11-10 06:02:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:43,004 INFO L93 Difference]: Finished difference Result 435 states and 574 transitions. [2018-11-10 06:02:43,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:02:43,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2018-11-10 06:02:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:43,007 INFO L225 Difference]: With dead ends: 435 [2018-11-10 06:02:43,007 INFO L226 Difference]: Without dead ends: 387 [2018-11-10 06:02:43,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:02:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-11-10 06:02:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 354. [2018-11-10 06:02:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-11-10 06:02:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 461 transitions. [2018-11-10 06:02:43,034 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 461 transitions. Word has length 57 [2018-11-10 06:02:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:43,034 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 461 transitions. [2018-11-10 06:02:43,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:02:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 461 transitions. [2018-11-10 06:02:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 06:02:43,035 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:43,036 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:43,036 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:43,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:43,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1751822324, now seen corresponding path program 1 times [2018-11-10 06:02:43,036 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:43,036 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:43,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:43,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:02:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:02:47,341 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:02:47,342 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:02:47,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 06:02:47,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:02:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:02:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=37, Unknown=2, NotChecked=0, Total=56 [2018-11-10 06:02:47,343 INFO L87 Difference]: Start difference. First operand 354 states and 461 transitions. Second operand 8 states. [2018-11-10 06:02:55,721 WARN L179 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2018-11-10 06:02:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:02:55,928 INFO L93 Difference]: Finished difference Result 371 states and 480 transitions. [2018-11-10 06:02:55,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:02:55,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2018-11-10 06:02:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:02:55,930 INFO L225 Difference]: With dead ends: 371 [2018-11-10 06:02:55,930 INFO L226 Difference]: Without dead ends: 369 [2018-11-10 06:02:55,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2018-11-10 06:02:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2018-11-10 06:02:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 359. [2018-11-10 06:02:55,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-11-10 06:02:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 466 transitions. [2018-11-10 06:02:55,957 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 466 transitions. Word has length 58 [2018-11-10 06:02:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:02:55,957 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 466 transitions. [2018-11-10 06:02:55,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:02:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 466 transitions. [2018-11-10 06:02:55,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-10 06:02:55,959 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:02:55,959 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:02:55,959 INFO L424 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:02:55,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:02:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1753305508, now seen corresponding path program 1 times [2018-11-10 06:02:55,960 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:02:55,960 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:02:55,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:02:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:02:56,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:03:04,223 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:04,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:04,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 06:03:04,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:03:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:03:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=37, Unknown=4, NotChecked=0, Total=56 [2018-11-10 06:03:04,225 INFO L87 Difference]: Start difference. First operand 359 states and 466 transitions. Second operand 8 states. [2018-11-10 06:03:19,199 WARN L179 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-11-10 06:03:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:29,442 INFO L93 Difference]: Finished difference Result 375 states and 483 transitions. [2018-11-10 06:03:29,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:03:29,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2018-11-10 06:03:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:29,443 INFO L225 Difference]: With dead ends: 375 [2018-11-10 06:03:29,443 INFO L226 Difference]: Without dead ends: 373 [2018-11-10 06:03:29,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=23, Invalid=61, Unknown=6, NotChecked=0, Total=90 [2018-11-10 06:03:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-11-10 06:03:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 358. [2018-11-10 06:03:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-11-10 06:03:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 464 transitions. [2018-11-10 06:03:29,469 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 464 transitions. Word has length 59 [2018-11-10 06:03:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:29,469 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 464 transitions. [2018-11-10 06:03:29,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:03:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 464 transitions. [2018-11-10 06:03:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-10 06:03:29,471 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:29,471 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:29,471 INFO L424 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:29,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1044755573, now seen corresponding path program 1 times [2018-11-10 06:03:29,471 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:29,472 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:29,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:29,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:03:29,551 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:29,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:29,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:03:29,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:03:29,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:03:29,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:03:29,554 INFO L87 Difference]: Start difference. First operand 358 states and 464 transitions. Second operand 4 states. [2018-11-10 06:03:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:29,595 INFO L93 Difference]: Finished difference Result 367 states and 472 transitions. [2018-11-10 06:03:29,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 06:03:29,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2018-11-10 06:03:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:29,597 INFO L225 Difference]: With dead ends: 367 [2018-11-10 06:03:29,597 INFO L226 Difference]: Without dead ends: 310 [2018-11-10 06:03:29,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:03:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-11-10 06:03:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 300. [2018-11-10 06:03:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-10 06:03:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 380 transitions. [2018-11-10 06:03:29,616 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 380 transitions. Word has length 59 [2018-11-10 06:03:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:29,617 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 380 transitions. [2018-11-10 06:03:29,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:03:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 380 transitions. [2018-11-10 06:03:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-10 06:03:29,618 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:29,618 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:29,618 INFO L424 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:29,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -777407259, now seen corresponding path program 1 times [2018-11-10 06:03:29,619 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:29,619 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 32 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:29,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:29,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 06:03:29,688 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:29,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:29,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:03:29,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:03:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:03:29,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:03:29,691 INFO L87 Difference]: Start difference. First operand 300 states and 380 transitions. Second operand 5 states. [2018-11-10 06:03:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:29,855 INFO L93 Difference]: Finished difference Result 369 states and 469 transitions. [2018-11-10 06:03:29,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:03:29,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2018-11-10 06:03:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:29,857 INFO L225 Difference]: With dead ends: 369 [2018-11-10 06:03:29,857 INFO L226 Difference]: Without dead ends: 346 [2018-11-10 06:03:29,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:03:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-11-10 06:03:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 300. [2018-11-10 06:03:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-10 06:03:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 378 transitions. [2018-11-10 06:03:29,877 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 378 transitions. Word has length 59 [2018-11-10 06:03:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:29,878 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 378 transitions. [2018-11-10 06:03:29,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:03:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 378 transitions. [2018-11-10 06:03:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-10 06:03:29,879 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:29,879 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:29,879 INFO L424 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:29,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:29,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1142510091, now seen corresponding path program 1 times [2018-11-10 06:03:29,880 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:29,880 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:29,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:29,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:03:30,026 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:30,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:30,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 06:03:30,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:03:30,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:03:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:03:30,030 INFO L87 Difference]: Start difference. First operand 300 states and 378 transitions. Second operand 8 states. [2018-11-10 06:03:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:30,316 INFO L93 Difference]: Finished difference Result 406 states and 527 transitions. [2018-11-10 06:03:30,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:03:30,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2018-11-10 06:03:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:30,318 INFO L225 Difference]: With dead ends: 406 [2018-11-10 06:03:30,318 INFO L226 Difference]: Without dead ends: 366 [2018-11-10 06:03:30,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-10 06:03:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2018-11-10 06:03:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 344. [2018-11-10 06:03:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-11-10 06:03:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 441 transitions. [2018-11-10 06:03:30,339 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 441 transitions. Word has length 64 [2018-11-10 06:03:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:30,340 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 441 transitions. [2018-11-10 06:03:30,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:03:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 441 transitions. [2018-11-10 06:03:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 06:03:30,341 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:30,341 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:30,342 INFO L424 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:30,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash -951844154, now seen corresponding path program 1 times [2018-11-10 06:03:30,342 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:30,342 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 34 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:30,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:30,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:03:30,394 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:30,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:30,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:03:30,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:03:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:03:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:03:30,396 INFO L87 Difference]: Start difference. First operand 344 states and 441 transitions. Second operand 6 states. [2018-11-10 06:03:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:30,466 INFO L93 Difference]: Finished difference Result 441 states and 578 transitions. [2018-11-10 06:03:30,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:03:30,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2018-11-10 06:03:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:30,467 INFO L225 Difference]: With dead ends: 441 [2018-11-10 06:03:30,467 INFO L226 Difference]: Without dead ends: 339 [2018-11-10 06:03:30,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:03:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-11-10 06:03:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 297. [2018-11-10 06:03:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-11-10 06:03:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 360 transitions. [2018-11-10 06:03:30,481 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 360 transitions. Word has length 66 [2018-11-10 06:03:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:30,481 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 360 transitions. [2018-11-10 06:03:30,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:03:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 360 transitions. [2018-11-10 06:03:30,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 06:03:30,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:30,482 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:30,482 INFO L424 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:30,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:30,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1259163885, now seen corresponding path program 1 times [2018-11-10 06:03:30,483 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:30,483 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 35 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:30,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:30,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 06:03:30,611 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:30,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:30,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:03:30,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:03:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:03:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:03:30,614 INFO L87 Difference]: Start difference. First operand 297 states and 360 transitions. Second operand 6 states. [2018-11-10 06:03:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:30,661 INFO L93 Difference]: Finished difference Result 338 states and 412 transitions. [2018-11-10 06:03:30,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:03:30,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2018-11-10 06:03:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:30,663 INFO L225 Difference]: With dead ends: 338 [2018-11-10 06:03:30,663 INFO L226 Difference]: Without dead ends: 336 [2018-11-10 06:03:30,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:03:30,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-11-10 06:03:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 306. [2018-11-10 06:03:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2018-11-10 06:03:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 371 transitions. [2018-11-10 06:03:30,686 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 371 transitions. Word has length 66 [2018-11-10 06:03:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:30,686 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 371 transitions. [2018-11-10 06:03:30,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:03:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 371 transitions. [2018-11-10 06:03:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 06:03:30,688 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:30,688 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:30,688 INFO L424 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:30,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:30,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2023964009, now seen corresponding path program 1 times [2018-11-10 06:03:30,689 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:30,689 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 36 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:30,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:30,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 06:03:30,827 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:30,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:30,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:03:30,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:03:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:03:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:03:30,829 INFO L87 Difference]: Start difference. First operand 306 states and 371 transitions. Second operand 6 states. [2018-11-10 06:03:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:30,920 INFO L93 Difference]: Finished difference Result 335 states and 403 transitions. [2018-11-10 06:03:30,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:03:30,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2018-11-10 06:03:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:30,923 INFO L225 Difference]: With dead ends: 335 [2018-11-10 06:03:30,923 INFO L226 Difference]: Without dead ends: 333 [2018-11-10 06:03:30,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:03:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-11-10 06:03:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 310. [2018-11-10 06:03:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-11-10 06:03:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 374 transitions. [2018-11-10 06:03:30,947 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 374 transitions. Word has length 66 [2018-11-10 06:03:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:30,947 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 374 transitions. [2018-11-10 06:03:30,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:03:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 374 transitions. [2018-11-10 06:03:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 06:03:30,948 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:30,948 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:30,948 INFO L424 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:30,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash -584409713, now seen corresponding path program 1 times [2018-11-10 06:03:30,949 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:30,949 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 37 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:30,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:31,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 06:03:31,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:32,377 WARN L179 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2018-11-10 06:03:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 06:03:34,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:03:34,244 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:03:34,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:34,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-10 06:03:34,419 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:34,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:03:34,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [14, 15] total 26 [2018-11-10 06:03:34,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 06:03:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 06:03:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2018-11-10 06:03:34,439 INFO L87 Difference]: Start difference. First operand 310 states and 374 transitions. Second operand 26 states. [2018-11-10 06:03:34,940 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-11-10 06:03:36,706 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-11-10 06:03:37,363 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-11-10 06:03:39,685 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2018-11-10 06:03:40,732 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2018-11-10 06:03:41,682 WARN L179 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2018-11-10 06:03:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:43,789 INFO L93 Difference]: Finished difference Result 412 states and 514 transitions. [2018-11-10 06:03:43,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-10 06:03:43,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2018-11-10 06:03:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:43,793 INFO L225 Difference]: With dead ends: 412 [2018-11-10 06:03:43,793 INFO L226 Difference]: Without dead ends: 384 [2018-11-10 06:03:43,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 06:03:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2018-11-10 06:03:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 335. [2018-11-10 06:03:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-10 06:03:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 410 transitions. [2018-11-10 06:03:43,814 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 410 transitions. Word has length 71 [2018-11-10 06:03:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:43,814 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 410 transitions. [2018-11-10 06:03:43,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 06:03:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 410 transitions. [2018-11-10 06:03:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 06:03:43,815 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:43,816 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:43,816 INFO L424 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:43,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash -780563208, now seen corresponding path program 1 times [2018-11-10 06:03:43,816 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:43,816 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 39 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:43,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:43,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 06:03:43,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 06:03:44,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:03:44,064 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:03:44,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:44,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 06:03:44,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 06:03:44,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 06:03:44,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 14 [2018-11-10 06:03:44,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 06:03:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 06:03:44,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-10 06:03:44,220 INFO L87 Difference]: Start difference. First operand 335 states and 410 transitions. Second operand 14 states. [2018-11-10 06:03:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:44,572 INFO L93 Difference]: Finished difference Result 362 states and 443 transitions. [2018-11-10 06:03:44,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 06:03:44,572 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2018-11-10 06:03:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:44,574 INFO L225 Difference]: With dead ends: 362 [2018-11-10 06:03:44,574 INFO L226 Difference]: Without dead ends: 355 [2018-11-10 06:03:44,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 270 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2018-11-10 06:03:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-11-10 06:03:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 332. [2018-11-10 06:03:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-10 06:03:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 407 transitions. [2018-11-10 06:03:44,594 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 407 transitions. Word has length 72 [2018-11-10 06:03:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:44,595 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 407 transitions. [2018-11-10 06:03:44,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 06:03:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 407 transitions. [2018-11-10 06:03:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 06:03:44,596 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:44,596 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:44,596 INFO L424 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:44,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:44,597 INFO L82 PathProgramCache]: Analyzing trace with hash -91928840, now seen corresponding path program 2 times [2018-11-10 06:03:44,597 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:44,597 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 41 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:44,617 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 06:03:44,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 06:03:44,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:03:44,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 06:03:44,754 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:44,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:44,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 06:03:44,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:03:44,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:03:44,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-10 06:03:44,764 INFO L87 Difference]: Start difference. First operand 332 states and 407 transitions. Second operand 12 states. [2018-11-10 06:03:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:45,043 INFO L93 Difference]: Finished difference Result 355 states and 433 transitions. [2018-11-10 06:03:45,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 06:03:45,044 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-11-10 06:03:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:45,045 INFO L225 Difference]: With dead ends: 355 [2018-11-10 06:03:45,046 INFO L226 Difference]: Without dead ends: 348 [2018-11-10 06:03:45,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-11-10 06:03:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-11-10 06:03:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 324. [2018-11-10 06:03:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-11-10 06:03:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 397 transitions. [2018-11-10 06:03:45,066 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 397 transitions. Word has length 72 [2018-11-10 06:03:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:45,066 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 397 transitions. [2018-11-10 06:03:45,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:03:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 397 transitions. [2018-11-10 06:03:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 06:03:45,067 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:45,067 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:45,068 INFO L424 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:45,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1228974363, now seen corresponding path program 1 times [2018-11-10 06:03:45,068 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:45,068 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 42 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:45,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:03:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:45,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-10 06:03:45,265 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:45,267 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:45,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-10 06:03:45,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 06:03:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 06:03:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 06:03:45,267 INFO L87 Difference]: Start difference. First operand 324 states and 397 transitions. Second operand 9 states. [2018-11-10 06:03:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:45,846 INFO L93 Difference]: Finished difference Result 377 states and 466 transitions. [2018-11-10 06:03:45,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 06:03:45,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2018-11-10 06:03:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:45,848 INFO L225 Difference]: With dead ends: 377 [2018-11-10 06:03:45,848 INFO L226 Difference]: Without dead ends: 342 [2018-11-10 06:03:45,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:03:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2018-11-10 06:03:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 301. [2018-11-10 06:03:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-11-10 06:03:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 361 transitions. [2018-11-10 06:03:45,880 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 361 transitions. Word has length 72 [2018-11-10 06:03:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:45,881 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 361 transitions. [2018-11-10 06:03:45,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 06:03:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 361 transitions. [2018-11-10 06:03:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 06:03:45,882 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:45,882 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:45,882 INFO L424 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:45,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1427157820, now seen corresponding path program 1 times [2018-11-10 06:03:45,882 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:45,883 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 43 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:45,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:45,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-10 06:03:45,975 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:45,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:45,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:03:45,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:03:45,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:03:45,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:03:45,977 INFO L87 Difference]: Start difference. First operand 301 states and 361 transitions. Second operand 6 states. [2018-11-10 06:03:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:46,221 INFO L93 Difference]: Finished difference Result 413 states and 506 transitions. [2018-11-10 06:03:46,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 06:03:46,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2018-11-10 06:03:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:46,223 INFO L225 Difference]: With dead ends: 413 [2018-11-10 06:03:46,223 INFO L226 Difference]: Without dead ends: 394 [2018-11-10 06:03:46,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:03:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-11-10 06:03:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 295. [2018-11-10 06:03:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-11-10 06:03:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 354 transitions. [2018-11-10 06:03:46,259 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 354 transitions. Word has length 72 [2018-11-10 06:03:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:46,260 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 354 transitions. [2018-11-10 06:03:46,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:03:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 354 transitions. [2018-11-10 06:03:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-10 06:03:46,260 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:46,260 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:46,260 INFO L424 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:46,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash -360237730, now seen corresponding path program 1 times [2018-11-10 06:03:46,261 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:46,261 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 44 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:46,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:46,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 06:03:46,348 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:46,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:46,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:03:46,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:03:46,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:03:46,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:03:46,350 INFO L87 Difference]: Start difference. First operand 295 states and 354 transitions. Second operand 6 states. [2018-11-10 06:03:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:46,401 INFO L93 Difference]: Finished difference Result 316 states and 376 transitions. [2018-11-10 06:03:46,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:03:46,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2018-11-10 06:03:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:46,403 INFO L225 Difference]: With dead ends: 316 [2018-11-10 06:03:46,403 INFO L226 Difference]: Without dead ends: 312 [2018-11-10 06:03:46,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:03:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-11-10 06:03:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 282. [2018-11-10 06:03:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-10 06:03:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 337 transitions. [2018-11-10 06:03:46,432 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 337 transitions. Word has length 74 [2018-11-10 06:03:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:46,432 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 337 transitions. [2018-11-10 06:03:46,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:03:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 337 transitions. [2018-11-10 06:03:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-10 06:03:46,433 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:46,433 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:46,433 INFO L424 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:46,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:46,434 INFO L82 PathProgramCache]: Analyzing trace with hash -302979428, now seen corresponding path program 1 times [2018-11-10 06:03:46,434 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:46,434 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 45 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:46,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:46,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 06:03:46,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:47,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:03:47,417 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:03:47,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:47,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 06:03:47,570 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:47,589 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 06:03:47,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2018-11-10 06:03:47,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 06:03:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 06:03:47,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2018-11-10 06:03:47,590 INFO L87 Difference]: Start difference. First operand 282 states and 337 transitions. Second operand 17 states. [2018-11-10 06:03:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:48,803 INFO L93 Difference]: Finished difference Result 331 states and 390 transitions. [2018-11-10 06:03:48,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 06:03:48,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2018-11-10 06:03:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:48,804 INFO L225 Difference]: With dead ends: 331 [2018-11-10 06:03:48,804 INFO L226 Difference]: Without dead ends: 183 [2018-11-10 06:03:48,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2018-11-10 06:03:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-10 06:03:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 163. [2018-11-10 06:03:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-10 06:03:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2018-11-10 06:03:48,817 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 74 [2018-11-10 06:03:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:48,817 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2018-11-10 06:03:48,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 06:03:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2018-11-10 06:03:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 06:03:48,818 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:48,818 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:48,818 INFO L424 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:48,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash 73044863, now seen corresponding path program 1 times [2018-11-10 06:03:48,819 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:48,819 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 47 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:48,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:48,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:03:48,882 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:48,884 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:48,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 06:03:48,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:03:48,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:03:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:03:48,885 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand 4 states. [2018-11-10 06:03:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:48,921 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2018-11-10 06:03:48,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 06:03:48,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-10 06:03:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:48,922 INFO L225 Difference]: With dead ends: 201 [2018-11-10 06:03:48,922 INFO L226 Difference]: Without dead ends: 177 [2018-11-10 06:03:48,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:03:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-10 06:03:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2018-11-10 06:03:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-10 06:03:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2018-11-10 06:03:48,934 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 73 [2018-11-10 06:03:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:48,935 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2018-11-10 06:03:48,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:03:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2018-11-10 06:03:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 06:03:48,935 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:48,935 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:48,935 INFO L424 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:48,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -321321923, now seen corresponding path program 1 times [2018-11-10 06:03:48,936 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:48,936 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 48 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:48,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:48,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:49,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:49,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:03:49,137 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:03:49,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:49,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:49,177 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:49,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 06:03:49,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 12 [2018-11-10 06:03:49,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:03:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:03:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-11-10 06:03:49,275 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand 12 states. [2018-11-10 06:03:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:49,472 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2018-11-10 06:03:49,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:03:49,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-11-10 06:03:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:49,474 INFO L225 Difference]: With dead ends: 186 [2018-11-10 06:03:49,474 INFO L226 Difference]: Without dead ends: 155 [2018-11-10 06:03:49,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-11-10 06:03:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-10 06:03:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2018-11-10 06:03:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-11-10 06:03:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2018-11-10 06:03:49,488 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 73 [2018-11-10 06:03:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:49,488 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2018-11-10 06:03:49,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:03:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2018-11-10 06:03:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 06:03:49,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:49,489 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:49,489 INFO L424 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:49,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash 310914977, now seen corresponding path program 1 times [2018-11-10 06:03:49,490 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:49,490 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 50 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:49,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:49,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:03:49,574 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:49,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:49,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 06:03:49,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:03:49,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:03:49,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:03:49,576 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 6 states. [2018-11-10 06:03:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:49,772 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2018-11-10 06:03:49,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:03:49,772 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2018-11-10 06:03:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:49,773 INFO L225 Difference]: With dead ends: 193 [2018-11-10 06:03:49,773 INFO L226 Difference]: Without dead ends: 163 [2018-11-10 06:03:49,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:03:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-10 06:03:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 152. [2018-11-10 06:03:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-11-10 06:03:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 178 transitions. [2018-11-10 06:03:49,788 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 178 transitions. Word has length 75 [2018-11-10 06:03:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:49,788 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 178 transitions. [2018-11-10 06:03:49,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:03:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 178 transitions. [2018-11-10 06:03:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 06:03:49,789 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:49,789 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:49,790 INFO L424 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:49,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:49,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1154920479, now seen corresponding path program 1 times [2018-11-10 06:03:49,790 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:49,790 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 51 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:49,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:49,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 06:03:49,844 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:49,845 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:49,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:03:49,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:03:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:03:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:03:49,846 INFO L87 Difference]: Start difference. First operand 152 states and 178 transitions. Second operand 5 states. [2018-11-10 06:03:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:49,883 INFO L93 Difference]: Finished difference Result 173 states and 198 transitions. [2018-11-10 06:03:49,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:03:49,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2018-11-10 06:03:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:49,884 INFO L225 Difference]: With dead ends: 173 [2018-11-10 06:03:49,884 INFO L226 Difference]: Without dead ends: 120 [2018-11-10 06:03:49,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:03:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-10 06:03:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2018-11-10 06:03:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-10 06:03:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2018-11-10 06:03:49,893 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 75 [2018-11-10 06:03:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:49,894 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2018-11-10 06:03:49,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:03:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2018-11-10 06:03:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 06:03:49,894 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:49,894 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:49,894 INFO L424 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:49,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:49,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1012514851, now seen corresponding path program 1 times [2018-11-10 06:03:49,895 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:49,895 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 52 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:49,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:49,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:49,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:50,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:03:50,036 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:03:50,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:50,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:50,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:03:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 06:03:50,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 06:03:50,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 10 [2018-11-10 06:03:50,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 06:03:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 06:03:50,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-10 06:03:50,140 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 10 states. [2018-11-10 06:03:50,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:50,228 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2018-11-10 06:03:50,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 06:03:50,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2018-11-10 06:03:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:50,229 INFO L225 Difference]: With dead ends: 119 [2018-11-10 06:03:50,229 INFO L226 Difference]: Without dead ends: 84 [2018-11-10 06:03:50,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 284 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:03:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-10 06:03:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-10 06:03:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-10 06:03:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2018-11-10 06:03:50,236 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 75 [2018-11-10 06:03:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:50,236 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2018-11-10 06:03:50,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 06:03:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2018-11-10 06:03:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 06:03:50,236 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:50,236 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:50,237 INFO L424 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:50,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:50,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1491398822, now seen corresponding path program 1 times [2018-11-10 06:03:50,237 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:50,237 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 54 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:50,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:50,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-10 06:03:50,982 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:50,984 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:50,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 06:03:50,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:03:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:03:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-10 06:03:50,984 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 12 states. [2018-11-10 06:03:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:54,563 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2018-11-10 06:03:54,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:03:54,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2018-11-10 06:03:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:54,564 INFO L225 Difference]: With dead ends: 92 [2018-11-10 06:03:54,564 INFO L226 Difference]: Without dead ends: 74 [2018-11-10 06:03:54,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-11-10 06:03:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-10 06:03:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-11-10 06:03:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-10 06:03:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-11-10 06:03:54,571 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 79 [2018-11-10 06:03:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:54,571 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-11-10 06:03:54,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:03:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-11-10 06:03:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-10 06:03:54,571 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:03:54,572 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:03:54,572 INFO L424 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:03:54,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:03:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash 124101106, now seen corresponding path program 1 times [2018-11-10 06:03:54,572 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 06:03:54,572 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e7c57ad-5e55-45f5-98ed-a74a4e8bd697/bin-2019/utaipan/cvc4nyu Starting monitored process 55 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 06:03:54,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:03:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:03:54,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:03:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-10 06:03:54,829 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:03:54,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:03:54,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-11-10 06:03:54,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 06:03:54,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 06:03:54,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-10 06:03:54,832 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 10 states. [2018-11-10 06:03:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:03:55,181 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2018-11-10 06:03:55,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 06:03:55,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2018-11-10 06:03:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:03:55,182 INFO L225 Difference]: With dead ends: 74 [2018-11-10 06:03:55,182 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 06:03:55,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-10 06:03:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 06:03:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 06:03:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 06:03:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 06:03:55,183 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2018-11-10 06:03:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:03:55,183 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 06:03:55,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 06:03:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 06:03:55,183 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 06:03:55,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 06:03:55,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:55,337 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 149 [2018-11-10 06:03:55,502 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:55,531 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 122 [2018-11-10 06:03:55,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:55,582 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:55,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:55,594 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:55,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:55,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 06:03:57,562 WARN L179 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 145 DAG size of output: 95 [2018-11-10 06:04:20,016 WARN L179 SmtUtils]: Spent 22.45 s on a formula simplification. DAG size of input: 151 DAG size of output: 66 [2018-11-10 06:04:21,269 WARN L179 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2018-11-10 06:04:21,515 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2018-11-10 06:05:46,888 WARN L179 SmtUtils]: Spent 1.42 m on a formula simplification. DAG size of input: 356 DAG size of output: 230 [2018-11-10 06:06:55,173 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:191) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplifyWithStatistics(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:982) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) 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: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 31 more [2018-11-10 06:06:55,175 INFO L168 Benchmark]: Toolchain (without parser) took 269070.37 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 293.1 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -191.1 MB). Peak memory consumption was 433.0 MB. Max. memory is 11.5 GB. [2018-11-10 06:06:55,176 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:06:55,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.07 ms. Allocated memory is still 1.0 GB. Free memory was 949.2 MB in the beginning and 933.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 06:06:55,177 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.07 ms. Allocated memory is still 1.0 GB. Free memory was 933.1 MB in the beginning and 927.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 06:06:55,177 INFO L168 Benchmark]: Boogie Preprocessor took 31.06 ms. Allocated memory is still 1.0 GB. Free memory is still 927.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:06:55,177 INFO L168 Benchmark]: RCFGBuilder took 422.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 927.7 MB in the beginning and 1.1 GB in the end (delta: -202.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-11-10 06:06:55,178 INFO L168 Benchmark]: TraceAbstraction took 268330.46 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 124.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -10.3 MB). Peak memory consumption was 444.9 MB. Max. memory is 11.5 GB. [2018-11-10 06:06:55,180 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 263.07 ms. Allocated memory is still 1.0 GB. Free memory was 949.2 MB in the beginning and 933.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.07 ms. Allocated memory is still 1.0 GB. Free memory was 933.1 MB in the beginning and 927.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.06 ms. Allocated memory is still 1.0 GB. Free memory is still 927.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 422.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 927.7 MB in the beginning and 1.1 GB in the end (delta: -202.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 268330.46 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 124.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -10.3 MB). Peak memory consumption was 444.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...