./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/ldv-regression/rule60_list2_true-termination.c_false-unreach-call_1.i --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_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/rule60_list2_true-termination.c_false-unreach-call_1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/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 f18f7f1f917468e24f0e5d26966f1156107884dd ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:32:55,250 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:32:55,251 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:32:55,263 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:32:55,264 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:32:55,265 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:32:55,266 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:32:55,268 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:32:55,270 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:32:55,271 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:32:55,272 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:32:55,272 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:32:55,274 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:32:55,275 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:32:55,276 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:32:55,277 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:32:55,278 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:32:55,280 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:32:55,283 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:32:55,284 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:32:55,286 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:32:55,287 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:32:55,289 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 22:32:55,290 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 22:32:55,290 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 22:32:55,291 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 22:32:55,292 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 22:32:55,294 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 22:32:55,294 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 22:32:55,296 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 22:32:55,296 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 22:32:55,297 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 22:32:55,297 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 22:32:55,298 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 22:32:55,299 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 22:32:55,299 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 22:32:55,300 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 22:32:55,315 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:32:55,316 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:32:55,316 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:32:55,317 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 22:32:55,317 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 22:32:55,318 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 22:32:55,318 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 22:32:55,318 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 22:32:55,318 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 22:32:55,319 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 22:32:55,319 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 22:32:55,320 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:32:55,320 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 22:32:55,320 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:32:55,320 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 22:32:55,320 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:32:55,321 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:32:55,322 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:32:55,323 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:32:55,323 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 22:32:55,323 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:32:55,323 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:32:55,324 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:32:55,324 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:32:55,324 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:32:55,324 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:32:55,324 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:32:55,325 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:32:55,325 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:32:55,325 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:32:55,325 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 22:32:55,325 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:32:55,326 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:32:55,326 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:32:55,326 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_cdbcc8d0-153f-4e88-9ca9-957f3368c755/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 -> f18f7f1f917468e24f0e5d26966f1156107884dd [2018-10-26 22:32:55,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:32:55,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:32:55,380 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:32:55,381 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:32:55,382 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:32:55,382 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/../../sv-benchmarks/c/ldv-regression/rule60_list2_true-termination.c_false-unreach-call_1.i [2018-10-26 22:32:55,446 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/data/870a8941e/e1c3fe2362a44e8ba1b7453c86b77a2a/FLAG7470f7b69 [2018-10-26 22:32:55,954 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:32:55,955 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/sv-benchmarks/c/ldv-regression/rule60_list2_true-termination.c_false-unreach-call_1.i [2018-10-26 22:32:55,966 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/data/870a8941e/e1c3fe2362a44e8ba1b7453c86b77a2a/FLAG7470f7b69 [2018-10-26 22:32:55,981 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/data/870a8941e/e1c3fe2362a44e8ba1b7453c86b77a2a [2018-10-26 22:32:55,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:32:55,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 22:32:55,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:32:55,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:32:55,991 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:32:55,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:32:55" (1/1) ... [2018-10-26 22:32:55,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524d3618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:55, skipping insertion in model container [2018-10-26 22:32:55,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:32:55" (1/1) ... [2018-10-26 22:32:56,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:32:56,060 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:32:56,422 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:32:56,428 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:32:56,471 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:32:56,529 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:32:56,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56 WrapperNode [2018-10-26 22:32:56,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:32:56,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:32:56,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:32:56,531 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:32:56,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:32:56,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:32:56,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:32:56,663 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:32:56,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... [2018-10-26 22:32:56,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:32:56,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:32:56,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:32:56,710 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:32:56,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/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 [2018-10-26 22:32:56,772 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2018-10-26 22:32:56,772 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2018-10-26 22:32:56,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 22:32:56,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 22:32:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 22:32:56,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 22:32:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2018-10-26 22:32:56,773 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2018-10-26 22:32:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2018-10-26 22:32:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2018-10-26 22:32:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2018-10-26 22:32:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2018-10-26 22:32:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2018-10-26 22:32:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2018-10-26 22:32:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:32:56,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:32:57,332 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:32:57,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:32:57 BoogieIcfgContainer [2018-10-26 22:32:57,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:32:57,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:32:57,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:32:57,339 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:32:57,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:32:55" (1/3) ... [2018-10-26 22:32:57,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5abe92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:32:57, skipping insertion in model container [2018-10-26 22:32:57,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:56" (2/3) ... [2018-10-26 22:32:57,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5abe92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:32:57, skipping insertion in model container [2018-10-26 22:32:57,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:32:57" (3/3) ... [2018-10-26 22:32:57,345 INFO L112 eAbstractionObserver]: Analyzing ICFG rule60_list2_true-termination.c_false-unreach-call_1.i [2018-10-26 22:32:57,358 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:32:57,366 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:32:57,384 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:32:57,421 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:32:57,421 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:32:57,421 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:32:57,421 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:32:57,421 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:32:57,422 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:32:57,422 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:32:57,422 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:32:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-10-26 22:32:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 22:32:57,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:57,444 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:57,446 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:57,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash -695557442, now seen corresponding path program 1 times [2018-10-26 22:32:57,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:32:57,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:57,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:57,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:57,503 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:32:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:57,725 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:32:57,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 22:32:57,725 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:32:57,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:32:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:32:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:32:57,741 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-10-26 22:32:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:58,024 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2018-10-26 22:32:58,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:32:58,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-26 22:32:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:58,037 INFO L225 Difference]: With dead ends: 86 [2018-10-26 22:32:58,037 INFO L226 Difference]: Without dead ends: 40 [2018-10-26 22:32:58,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:32:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-26 22:32:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-26 22:32:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-26 22:32:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-10-26 22:32:58,085 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2018-10-26 22:32:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:58,085 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-10-26 22:32:58,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:32:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-10-26 22:32:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:32:58,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:58,088 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 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] [2018-10-26 22:32:58,088 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:58,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash -314025953, now seen corresponding path program 1 times [2018-10-26 22:32:58,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:32:58,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:58,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:58,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:58,091 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:32:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-26 22:32:58,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:32:58,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-26 22:32:58,326 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:32:58,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:32:58,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:32:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:32:58,330 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2018-10-26 22:32:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:58,385 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2018-10-26 22:32:58,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:32:58,388 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2018-10-26 22:32:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:58,390 INFO L225 Difference]: With dead ends: 65 [2018-10-26 22:32:58,391 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 22:32:58,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:32:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 22:32:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-26 22:32:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-26 22:32:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2018-10-26 22:32:58,403 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2018-10-26 22:32:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:58,404 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2018-10-26 22:32:58,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:32:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2018-10-26 22:32:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:32:58,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:58,405 INFO L375 BasicCegarLoop]: trace histogram [2, 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] [2018-10-26 22:32:58,405 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:58,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:58,406 INFO L82 PathProgramCache]: Analyzing trace with hash -607428960, now seen corresponding path program 1 times [2018-10-26 22:32:58,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:32:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:58,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:58,408 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:32:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-26 22:32:58,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:58,565 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:32:58,566 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-10-26 22:32:58,568 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [14], [19], [30], [36], [38], [40], [43], [54], [57], [62], [65], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80] [2018-10-26 22:32:58,646 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:32:58,646 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:32:59,320 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:32:59,323 INFO L272 AbstractInterpreter]: Visited 27 different actions 73 times. Merged at 9 different actions 23 times. Never widened. Never found a fixpoint. Largest state had 32 variables. [2018-10-26 22:32:59,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:59,372 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:33:00,051 INFO L227 lantSequenceWeakener]: Weakened 34 states. On average, predicates are now at 59.62% of their original sizes. [2018-10-26 22:33:00,051 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:33:04,194 INFO L415 sIntCurrentIteration]: We unified 37 AI predicates to 37 [2018-10-26 22:33:04,194 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:33:04,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:04,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [27] imperfect sequences [7] total 32 [2018-10-26 22:33:04,195 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:33:04,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-26 22:33:04,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-26 22:33:04,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:33:04,197 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 27 states. [2018-10-26 22:33:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:12,099 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2018-10-26 22:33:12,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:33:12,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2018-10-26 22:33:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:12,101 INFO L225 Difference]: With dead ends: 71 [2018-10-26 22:33:12,101 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 22:33:12,102 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:33:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 22:33:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-10-26 22:33:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-26 22:33:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2018-10-26 22:33:12,120 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 38 [2018-10-26 22:33:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:12,121 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2018-10-26 22:33:12,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-26 22:33:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2018-10-26 22:33:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-26 22:33:12,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:12,123 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 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] [2018-10-26 22:33:12,123 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:12,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash -988491854, now seen corresponding path program 1 times [2018-10-26 22:33:12,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:33:12,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:12,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:12,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:12,127 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:33:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-26 22:33:12,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:12,261 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:33:12,261 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-10-26 22:33:12,261 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [14], [17], [19], [22], [25], [29], [30], [36], [38], [40], [43], [54], [57], [62], [65], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82] [2018-10-26 22:33:12,264 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:33:12,264 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:33:12,549 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:33:12,549 INFO L272 AbstractInterpreter]: Visited 33 different actions 85 times. Merged at 9 different actions 23 times. Never widened. Never found a fixpoint. Largest state had 32 variables. [2018-10-26 22:33:12,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:12,594 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:33:12,947 INFO L227 lantSequenceWeakener]: Weakened 41 states. On average, predicates are now at 61.9% of their original sizes. [2018-10-26 22:33:12,947 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:33:16,192 INFO L415 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2018-10-26 22:33:16,192 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:33:16,193 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:16,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [33] imperfect sequences [7] total 38 [2018-10-26 22:33:16,193 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:33:16,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:33:16,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:33:16,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:33:16,194 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 33 states. [2018-10-26 22:33:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:30,781 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2018-10-26 22:33:30,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:33:30,782 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 45 [2018-10-26 22:33:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:30,784 INFO L225 Difference]: With dead ends: 90 [2018-10-26 22:33:30,784 INFO L226 Difference]: Without dead ends: 84 [2018-10-26 22:33:30,786 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:33:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-26 22:33:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2018-10-26 22:33:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-26 22:33:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2018-10-26 22:33:30,813 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 45 [2018-10-26 22:33:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:30,814 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2018-10-26 22:33:30,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:33:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2018-10-26 22:33:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-26 22:33:30,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:30,815 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 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] [2018-10-26 22:33:30,816 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:30,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1797838480, now seen corresponding path program 1 times [2018-10-26 22:33:30,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:33:30,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:30,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:30,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:30,827 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:33:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-26 22:33:30,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:30,950 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:33:30,950 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-10-26 22:33:30,951 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [14], [17], [19], [22], [27], [29], [30], [36], [38], [40], [43], [54], [57], [62], [65], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82] [2018-10-26 22:33:30,954 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:33:30,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:33:31,149 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:33:31,149 INFO L272 AbstractInterpreter]: Visited 33 different actions 85 times. Merged at 9 different actions 23 times. Never widened. Never found a fixpoint. Largest state had 32 variables. [2018-10-26 22:33:31,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:31,150 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:33:31,408 INFO L227 lantSequenceWeakener]: Weakened 41 states. On average, predicates are now at 61.9% of their original sizes. [2018-10-26 22:33:31,408 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:33:34,133 INFO L415 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2018-10-26 22:33:34,133 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:33:34,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:34,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [32] imperfect sequences [7] total 37 [2018-10-26 22:33:34,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:33:34,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:33:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:33:34,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:33:34,135 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 32 states. [2018-10-26 22:33:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:44,568 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2018-10-26 22:33:44,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:33:44,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2018-10-26 22:33:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:44,573 INFO L225 Difference]: With dead ends: 103 [2018-10-26 22:33:44,573 INFO L226 Difference]: Without dead ends: 97 [2018-10-26 22:33:44,574 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:33:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-26 22:33:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2018-10-26 22:33:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-26 22:33:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2018-10-26 22:33:44,596 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 45 [2018-10-26 22:33:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:44,598 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2018-10-26 22:33:44,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:33:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2018-10-26 22:33:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-26 22:33:44,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:44,599 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2018-10-26 22:33:44,600 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:44,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:44,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1913090107, now seen corresponding path program 1 times [2018-10-26 22:33:44,600 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:33:44,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:44,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:44,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:44,604 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:33:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-26 22:33:44,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:44,717 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:33:44,717 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-10-26 22:33:44,717 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [6], [9], [13], [14], [17], [19], [22], [25], [29], [30], [36], [38], [40], [43], [54], [57], [62], [65], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86] [2018-10-26 22:33:44,719 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:33:44,720 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:33:44,897 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:33:44,897 INFO L272 AbstractInterpreter]: Visited 37 different actions 89 times. Merged at 9 different actions 23 times. Never widened. Never found a fixpoint. Largest state had 32 variables. [2018-10-26 22:33:44,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:44,905 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:33:45,166 INFO L227 lantSequenceWeakener]: Weakened 48 states. On average, predicates are now at 63.19% of their original sizes. [2018-10-26 22:33:45,166 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:33:48,998 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-10-26 22:33:48,998 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:33:48,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:48,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [39] imperfect sequences [7] total 44 [2018-10-26 22:33:48,999 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:33:48,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 22:33:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 22:33:49,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:33:49,000 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 39 states. [2018-10-26 22:34:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:00,548 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2018-10-26 22:34:00,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:34:00,549 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 57 [2018-10-26 22:34:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:00,550 INFO L225 Difference]: With dead ends: 131 [2018-10-26 22:34:00,550 INFO L226 Difference]: Without dead ends: 118 [2018-10-26 22:34:00,551 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=214, Invalid=2978, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 22:34:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-26 22:34:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2018-10-26 22:34:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-26 22:34:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2018-10-26 22:34:00,574 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 57 [2018-10-26 22:34:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:00,575 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2018-10-26 22:34:00,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 22:34:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2018-10-26 22:34:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-26 22:34:00,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:00,576 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2018-10-26 22:34:00,576 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:00,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:00,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1572530563, now seen corresponding path program 1 times [2018-10-26 22:34:00,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:34:00,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:00,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:00,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:00,579 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:34:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-26 22:34:00,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:00,678 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:34:00,679 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-10-26 22:34:00,679 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [6], [11], [13], [14], [17], [19], [22], [25], [29], [30], [36], [38], [40], [43], [54], [57], [62], [65], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86] [2018-10-26 22:34:00,681 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:34:00,681 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:34:00,837 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:34:00,837 INFO L272 AbstractInterpreter]: Visited 40 different actions 98 times. Merged at 9 different actions 23 times. Never widened. Never found a fixpoint. Largest state had 32 variables. [2018-10-26 22:34:00,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:00,849 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:34:01,107 INFO L227 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 64.32% of their original sizes. [2018-10-26 22:34:01,107 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:34:05,085 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-10-26 22:34:05,085 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:34:05,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:34:05,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [41] imperfect sequences [7] total 46 [2018-10-26 22:34:05,085 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:34:05,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:34:05,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:34:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:34:05,087 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 41 states. [2018-10-26 22:34:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:19,630 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2018-10-26 22:34:19,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:34:19,630 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 57 [2018-10-26 22:34:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:19,632 INFO L225 Difference]: With dead ends: 136 [2018-10-26 22:34:19,632 INFO L226 Difference]: Without dead ends: 125 [2018-10-26 22:34:19,633 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=238, Invalid=3544, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:34:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-26 22:34:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2018-10-26 22:34:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:34:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2018-10-26 22:34:19,660 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 57 [2018-10-26 22:34:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:19,662 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2018-10-26 22:34:19,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:34:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2018-10-26 22:34:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-26 22:34:19,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:19,663 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2018-10-26 22:34:19,664 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:19,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1795071175, now seen corresponding path program 1 times [2018-10-26 22:34:19,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:34:19,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:19,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:19,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:19,668 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:34:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-26 22:34:19,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:19,927 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:34:19,927 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-10-26 22:34:19,927 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [6], [9], [13], [14], [17], [19], [22], [25], [27], [29], [30], [36], [38], [40], [43], [54], [57], [62], [65], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86] [2018-10-26 22:34:19,929 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:34:19,929 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:34:20,172 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:34:20,172 INFO L272 AbstractInterpreter]: Visited 41 different actions 125 times. Merged at 13 different actions 34 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 32 variables. [2018-10-26 22:34:20,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:20,181 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:34:20,572 INFO L227 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 64.32% of their original sizes. [2018-10-26 22:34:20,573 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:34:25,177 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-10-26 22:34:25,178 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:34:25,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:34:25,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [42] imperfect sequences [7] total 47 [2018-10-26 22:34:25,178 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:34:25,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:34:25,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:34:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:34:25,180 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 42 states. [2018-10-26 22:34:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:47,233 INFO L93 Difference]: Finished difference Result 190 states and 212 transitions. [2018-10-26 22:34:47,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:34:47,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 57 [2018-10-26 22:34:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:47,234 INFO L225 Difference]: With dead ends: 190 [2018-10-26 22:34:47,235 INFO L226 Difference]: Without dead ends: 126 [2018-10-26 22:34:47,236 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=429, Invalid=4127, Unknown=0, NotChecked=0, Total=4556 [2018-10-26 22:34:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-26 22:34:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 89. [2018-10-26 22:34:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:34:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2018-10-26 22:34:47,257 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 57 [2018-10-26 22:34:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:47,257 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2018-10-26 22:34:47,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:34:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2018-10-26 22:34:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-26 22:34:47,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:47,258 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2018-10-26 22:34:47,259 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:47,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 754882113, now seen corresponding path program 1 times [2018-10-26 22:34:47,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:34:47,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:47,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:47,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:47,260 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:34:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-26 22:34:47,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:47,350 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:34:47,350 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-10-26 22:34:47,351 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [6], [11], [13], [14], [17], [19], [22], [25], [27], [29], [30], [36], [38], [40], [43], [54], [57], [62], [65], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86] [2018-10-26 22:34:47,352 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:34:47,353 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:34:47,652 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 22:34:47,652 INFO L272 AbstractInterpreter]: Visited 43 different actions 149 times. Merged at 14 different actions 40 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 32 variables. [2018-10-26 22:34:47,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:47,666 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 22:34:47,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:47,666 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/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 [2018-10-26 22:34:47,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:47,679 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 22:34:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:47,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 22:34:49,045 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:34:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 22:34:50,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 22:34:50,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 23] total 42 [2018-10-26 22:34:50,101 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 22:34:50,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:34:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:34:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:34:50,102 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 26 states. [2018-10-26 22:34:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:52,154 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2018-10-26 22:34:52,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:34:52,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2018-10-26 22:34:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:52,158 INFO L225 Difference]: With dead ends: 158 [2018-10-26 22:34:52,158 INFO L226 Difference]: Without dead ends: 93 [2018-10-26 22:34:52,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2018-10-26 22:34:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-26 22:34:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-10-26 22:34:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-26 22:34:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2018-10-26 22:34:52,187 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 57 [2018-10-26 22:34:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:52,187 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2018-10-26 22:34:52,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:34:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2018-10-26 22:34:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-26 22:34:52,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:52,191 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2018-10-26 22:34:52,191 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:52,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:52,191 INFO L82 PathProgramCache]: Analyzing trace with hash -945858366, now seen corresponding path program 1 times [2018-10-26 22:34:52,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:34:52,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:52,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:52,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:52,193 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:34:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 22:34:52,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:52,751 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:34:52,751 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-10-26 22:34:52,751 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [6], [11], [13], [14], [17], [19], [22], [25], [27], [29], [30], [36], [38], [40], [43], [54], [57], [62], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86] [2018-10-26 22:34:52,752 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:34:52,753 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:34:53,078 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:34:53,078 INFO L272 AbstractInterpreter]: Visited 40 different actions 99 times. Merged at 5 different actions 14 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 32 variables. [2018-10-26 22:34:53,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:53,107 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:34:53,503 INFO L227 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 64.32% of their original sizes. [2018-10-26 22:34:53,504 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:34:59,818 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-10-26 22:34:59,818 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:34:59,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:34:59,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [42] imperfect sequences [20] total 60 [2018-10-26 22:34:59,818 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:34:59,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:34:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:34:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:34:59,820 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 42 states. [2018-10-26 22:35:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:17,358 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-10-26 22:35:17,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:35:17,358 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 57 [2018-10-26 22:35:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:17,359 INFO L225 Difference]: With dead ends: 120 [2018-10-26 22:35:17,359 INFO L226 Difference]: Without dead ends: 99 [2018-10-26 22:35:17,361 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=414, Invalid=3492, Unknown=0, NotChecked=0, Total=3906 [2018-10-26 22:35:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-26 22:35:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2018-10-26 22:35:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-26 22:35:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-26 22:35:17,384 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 57 [2018-10-26 22:35:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:17,385 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-26 22:35:17,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:35:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-26 22:35:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-26 22:35:17,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:17,386 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 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] [2018-10-26 22:35:17,386 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:17,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:17,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1081406834, now seen corresponding path program 1 times [2018-10-26 22:35:17,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:35:17,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:17,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:17,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:17,388 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:35:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-26 22:35:17,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:17,797 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:35:17,798 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 65 with the following transitions: [2018-10-26 22:35:17,798 INFO L202 CegarAbsIntRunner]: [0], [2], [3], [4], [5], [6], [11], [13], [14], [17], [19], [22], [25], [29], [30], [36], [38], [40], [43], [54], [57], [62], [66], [67], [68], [69], [70], [72], [73], [74], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86], [87], [88] [2018-10-26 22:35:17,799 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:35:17,799 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:35:17,897 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 22:35:17,898 INFO L272 AbstractInterpreter]: Visited 41 different actions 69 times. Never merged. Never widened. Never found a fixpoint. Largest state had 32 variables. [2018-10-26 22:35:17,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:17,905 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 22:35:18,171 INFO L227 lantSequenceWeakener]: Weakened 60 states. On average, predicates are now at 65.09% of their original sizes. [2018-10-26 22:35:18,172 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 22:35:21,527 INFO L415 sIntCurrentIteration]: We unified 63 AI predicates to 63 [2018-10-26 22:35:21,527 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 22:35:21,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:35:21,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [43] imperfect sequences [19] total 60 [2018-10-26 22:35:21,528 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:35:21,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-26 22:35:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-26 22:35:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:35:21,529 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 43 states. [2018-10-26 22:35:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:29,197 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-26 22:35:29,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:35:29,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 64 [2018-10-26 22:35:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:29,198 INFO L225 Difference]: With dead ends: 100 [2018-10-26 22:35:29,198 INFO L226 Difference]: Without dead ends: 92 [2018-10-26 22:35:29,199 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2018-10-26 22:35:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-26 22:35:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2018-10-26 22:35:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-26 22:35:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-26 22:35:29,226 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 64 [2018-10-26 22:35:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:29,227 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-26 22:35:29,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-26 22:35:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-26 22:35:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-26 22:35:29,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:29,228 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 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] [2018-10-26 22:35:29,228 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:29,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1890753460, now seen corresponding path program 1 times [2018-10-26 22:35:29,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:35:29,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:29,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:29,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:29,234 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:35:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 22:35:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 22:35:29,290 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 22:35:29,303 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,304 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,305 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,306 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:35:29 BoogieIcfgContainer [2018-10-26 22:35:29,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:35:29,354 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 22:35:29,355 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 22:35:29,355 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 22:35:29,355 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:32:57" (3/4) ... [2018-10-26 22:35:29,359 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 22:35:29,361 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,361 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,362 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,362 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-26 22:35:29,467 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cdbcc8d0-153f-4e88-9ca9-957f3368c755/bin-2019/utaipan/witness.graphml [2018-10-26 22:35:29,467 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 22:35:29,468 INFO L168 Benchmark]: Toolchain (without parser) took 153483.36 ms. Allocated memory was 1.0 GB in the beginning and 2.0 GB in the end (delta: 991.4 MB). Free memory was 959.8 MB in the beginning and 902.0 MB in the end (delta: 57.8 MB). Peak memory consumption was 1.0 GB. Max. memory is 11.5 GB. [2018-10-26 22:35:29,479 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:35:29,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 543.35 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 927.6 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2018-10-26 22:35:29,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 132.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 927.6 MB in the beginning and 1.2 GB in the end (delta: -232.9 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-10-26 22:35:29,480 INFO L168 Benchmark]: Boogie Preprocessor took 46.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:35:29,480 INFO L168 Benchmark]: RCFGBuilder took 624.03 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:35:29,481 INFO L168 Benchmark]: TraceAbstraction took 152019.58 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 830.5 MB). Free memory was 1.1 GB in the beginning and 924.6 MB in the end (delta: 209.5 MB). Peak memory consumption was 1.0 GB. Max. memory is 11.5 GB. [2018-10-26 22:35:29,481 INFO L168 Benchmark]: Witness Printer took 113.07 ms. Allocated memory is still 2.0 GB. Free memory was 924.6 MB in the beginning and 902.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-10-26 22:35:29,483 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 543.35 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 927.6 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 132.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 927.6 MB in the beginning and 1.2 GB in the end (delta: -232.9 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 46.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 624.03 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 152019.58 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 830.5 MB). Free memory was 1.1 GB in the beginning and 924.6 MB in the end (delta: 209.5 MB). Peak memory consumption was 1.0 GB. Max. memory is 11.5 GB. * Witness Printer took 113.07 ms. Allocated memory is still 2.0 GB. Free memory was 924.6 MB in the beginning and 902.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] CALL static struct list_head head; [L900] RET static struct list_head head; [L900] RET static struct list_head head; [L900] RET static struct list_head head; [L903] struct list_head *dev1, *dev2; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={11:0}] [L904] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={11:0}] [L879] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={11:0}] [L871] COND TRUE (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={11:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] RET return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={11:0}, size=8] [L879] EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={11:0}, size=8] [L879] RET return __getMemory(size); [L904] EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:1}, head={11:0}, my_malloc(sizeof(*dev1))={0:1}] [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={11:0}] [L879] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={11:0}] [L871] COND TRUE (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={11:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] RET return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={11:0}, size=8] [L879] EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={11:0}, size=8] [L879] RET return __getMemory(size); [L905] EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={11:0}, my_malloc(sizeof(*dev2))={0:2}] [L905] dev2 = my_malloc(sizeof(*dev2)) [L906] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={11:0}] [L907] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, new={0:2}] [L890] COND TRUE (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, head={11:0}, new={0:2}, new={0:2}] [L891] COND TRUE __VERIFIER_nondet_int() [L892] RET elem = new VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, head={11:0}, new={0:2}, new={0:2}] [L907] list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={11:0}] [L908] CALL list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=2, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, new={0:1}] [L890] COND TRUE (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=2, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, head={11:0}, new={0:1}, new={0:1}] [L891] COND TRUE __VERIFIER_nondet_int() [L892] RET elem = new VAL [\old(elem)=0, \old(elem)=2, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, head={11:0}, new={0:1}, new={0:1}] [L908] list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}] [L909] CALL list_del(dev2) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, guard_malloc_counter={0:2}, head={11:0}] [L896] COND FALSE, RET !(entry==elem) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={11:0}] [L909] list_del(dev2) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}] [L910] CALL list_add(dev2, &head) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, new={0:2}] [L890] COND TRUE (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, head={11:0}, new={0:2}, new={0:2}] [L891] COND FALSE, RET !(__VERIFIER_nondet_int()) [L910] list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}] [L913] CALL list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, new={0:1}] [L890] COND FALSE !((new!=elem) ? (0) : __blast_assert ()) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}, head={11:0}, head={11:0}, new={0:1}, new={0:1}] [L890] CALL __blast_assert () VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}] [L6] __VERIFIER_error() VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. UNSAFE Result, 151.9s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 108.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 436 SDtfs, 615 SDslu, 4068 SDs, 0 SdLazy, 5195 SolverSat, 546 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.6s Time, PredicateUnifierStatistics: 16 DeclaredPredicates, 717 GetRequests, 210 SyntacticMatches, 7 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4826 ImplicationChecksByTransitivity, 55.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.7s AbstIntTime, 9 AbstIntIterations, 8 AbstIntStrong, 0.9459180751237997 AbsIntWeakeningRatio, 1.5533980582524272 AbsIntAvgWeakeningVarsNumRemoved, 195.80582524271844 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 131 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 649 NumberOfCodeBlocks, 649 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 629 ConstructedInterpolants, 0 QuantifiedInterpolants, 86414 SizeOfPredicates, 8 NumberOfNonLiveVariables, 319 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 171/230 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...