./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test22_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test22_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/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 efd11941ceab8dc56d9aa56f1950f714738654ba ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test22_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/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 efd11941ceab8dc56d9aa56f1950f714738654ba .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 06:47:39,625 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 06:47:39,626 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 06:47:39,632 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 06:47:39,632 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 06:47:39,633 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 06:47:39,633 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 06:47:39,634 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 06:47:39,635 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 06:47:39,635 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 06:47:39,636 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 06:47:39,636 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 06:47:39,636 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 06:47:39,637 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 06:47:39,637 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 06:47:39,638 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 06:47:39,638 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 06:47:39,639 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 06:47:39,640 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 06:47:39,641 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 06:47:39,641 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 06:47:39,642 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 06:47:39,643 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 06:47:39,643 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 06:47:39,643 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 06:47:39,643 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 06:47:39,644 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 06:47:39,644 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 06:47:39,645 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 06:47:39,645 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 06:47:39,645 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 06:47:39,646 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 06:47:39,646 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 06:47:39,646 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 06:47:39,646 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 06:47:39,647 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 06:47:39,647 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 06:47:39,654 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 06:47:39,654 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 06:47:39,654 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 06:47:39,655 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 06:47:39,655 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 06:47:39,656 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 06:47:39,656 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 06:47:39,656 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 06:47:39,656 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 06:47:39,656 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 06:47:39,656 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 06:47:39,656 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 06:47:39,656 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 06:47:39,657 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:47:39,657 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 06:47:39,657 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 06:47:39,658 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 06:47:39,658 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 06:47:39,658 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 06:47:39,658 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 06:47:39,658 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_952ba657-1f0f-40a6-8654-47a808f41e7c/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 -> efd11941ceab8dc56d9aa56f1950f714738654ba [2018-12-03 06:47:39,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 06:47:39,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 06:47:39,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 06:47:39,684 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 06:47:39,684 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 06:47:39,685 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-regression/test22_true-unreach-call.c [2018-12-03 06:47:39,722 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/d007d17e1/91cf5624ad5e443d8b586136dfd66457/FLAG23e01d63b [2018-12-03 06:47:40,004 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 06:47:40,004 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/sv-benchmarks/c/ldv-regression/test22_true-unreach-call.c [2018-12-03 06:47:40,008 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/d007d17e1/91cf5624ad5e443d8b586136dfd66457/FLAG23e01d63b [2018-12-03 06:47:40,016 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/d007d17e1/91cf5624ad5e443d8b586136dfd66457 [2018-12-03 06:47:40,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 06:47:40,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 06:47:40,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 06:47:40,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 06:47:40,021 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 06:47:40,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c1f7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40, skipping insertion in model container [2018-12-03 06:47:40,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 06:47:40,039 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 06:47:40,133 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:47:40,139 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 06:47:40,150 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:47:40,159 INFO L195 MainTranslator]: Completed translation [2018-12-03 06:47:40,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40 WrapperNode [2018-12-03 06:47:40,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 06:47:40,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 06:47:40,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 06:47:40,160 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 06:47:40,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 06:47:40,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 06:47:40,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 06:47:40,175 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 06:47:40,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... [2018-12-03 06:47:40,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 06:47:40,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 06:47:40,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 06:47:40,221 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 06:47:40,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure init [2018-12-03 06:47:40,254 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 06:47:40,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-12-03 06:47:40,254 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 06:47:40,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 06:47:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2018-12-03 06:47:40,254 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2018-12-03 06:47:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 06:47:40,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 06:47:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-03 06:47:40,371 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 06:47:40,371 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 06:47:40,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:47:40 BoogieIcfgContainer [2018-12-03 06:47:40,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 06:47:40,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 06:47:40,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 06:47:40,374 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 06:47:40,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 06:47:40" (1/3) ... [2018-12-03 06:47:40,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330749e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:47:40, skipping insertion in model container [2018-12-03 06:47:40,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:40" (2/3) ... [2018-12-03 06:47:40,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330749e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:47:40, skipping insertion in model container [2018-12-03 06:47:40,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:47:40" (3/3) ... [2018-12-03 06:47:40,376 INFO L112 eAbstractionObserver]: Analyzing ICFG test22_true-unreach-call.c [2018-12-03 06:47:40,382 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 06:47:40,386 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 06:47:40,395 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 06:47:40,413 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 06:47:40,413 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 06:47:40,413 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 06:47:40,414 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 06:47:40,414 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 06:47:40,414 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 06:47:40,414 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 06:47:40,414 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 06:47:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-12-03 06:47:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 06:47:40,429 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:40,429 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:40,430 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:40,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:40,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1838243936, now seen corresponding path program 1 times [2018-12-03 06:47:40,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:47:40,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:40,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:40,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:40,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:47:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:40,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:47:40,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 06:47:40,539 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:47:40,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-03 06:47:40,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-03 06:47:40,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:47:40,550 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2018-12-03 06:47:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:40,562 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2018-12-03 06:47:40,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-03 06:47:40,563 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2018-12-03 06:47:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:40,568 INFO L225 Difference]: With dead ends: 49 [2018-12-03 06:47:40,568 INFO L226 Difference]: Without dead ends: 31 [2018-12-03 06:47:40,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:47:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-03 06:47:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-03 06:47:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 06:47:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-12-03 06:47:40,593 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2018-12-03 06:47:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:40,595 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-12-03 06:47:40,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-03 06:47:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-12-03 06:47:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 06:47:40,596 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:40,596 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:40,596 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:40,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1291679579, now seen corresponding path program 1 times [2018-12-03 06:47:40,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:47:40,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:40,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:40,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:40,597 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:47:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:40,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:40,752 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:47:40,753 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-12-03 06:47:40,754 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [3], [6], [10], [11], [17], [19], [21], [24], [30], [35], [38], [45], [48], [55], [58], [59], [60], [61], [62], [64], [65], [66], [67], [68], [69], [70], [71], [72], [73] [2018-12-03 06:47:40,774 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 06:47:40,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 06:47:40,898 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 06:47:40,898 INFO L272 AbstractInterpreter]: Visited 32 different actions 38 times. Never merged. Never widened. Performed 306 root evaluator evaluations with a maximum evaluation depth of 5. Performed 306 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Never found a fixpoint. Largest state had 39 variables. [2018-12-03 06:47:40,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:40,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 06:47:40,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:40,907 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/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 [2018-12-03 06:47:40,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:40,913 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 06:47:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:40,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:41,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2018-12-03 06:47:41,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-12-03 06:47:41,050 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,054 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2018-12-03 06:47:41,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-12-03 06:47:41,069 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,073 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,083 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:43, output treesize:5 [2018-12-03 06:47:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:41,088 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:41,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2018-12-03 06:47:41,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-12-03 06:47:41,132 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,136 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:41,136 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:41,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-03 06:47:41,138 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,142 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:41,144 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:41,145 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2018-12-03 06:47:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:41,189 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 06:47:41,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [10] total 16 [2018-12-03 06:47:41,190 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:47:41,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 06:47:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 06:47:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-12-03 06:47:41,191 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2018-12-03 06:47:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:41,271 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-03 06:47:41,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 06:47:41,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2018-12-03 06:47:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:41,272 INFO L225 Difference]: With dead ends: 42 [2018-12-03 06:47:41,273 INFO L226 Difference]: Without dead ends: 34 [2018-12-03 06:47:41,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-12-03 06:47:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-03 06:47:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-03 06:47:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-03 06:47:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-12-03 06:47:41,278 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2018-12-03 06:47:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:41,278 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-12-03 06:47:41,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 06:47:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-12-03 06:47:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-03 06:47:41,279 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:41,279 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:41,279 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:41,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash -142788074, now seen corresponding path program 1 times [2018-12-03 06:47:41,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:47:41,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:41,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:41,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:41,281 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:47:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:41,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:41,442 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:47:41,442 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 41 with the following transitions: [2018-12-03 06:47:41,442 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [3], [6], [10], [11], [17], [19], [21], [24], [30], [35], [38], [40], [45], [48], [55], [58], [59], [60], [61], [62], [64], [65], [66], [67], [68], [69], [70], [71], [72], [73] [2018-12-03 06:47:41,444 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 06:47:41,444 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 06:47:41,500 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 06:47:41,501 INFO L272 AbstractInterpreter]: Visited 33 different actions 39 times. Never merged. Never widened. Performed 310 root evaluator evaluations with a maximum evaluation depth of 5. Performed 310 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 40 variables. [2018-12-03 06:47:41,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:41,509 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 06:47:41,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:41,509 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:41,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:41,517 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 06:47:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:41,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:41,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2018-12-03 06:47:41,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-12-03 06:47:41,627 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,630 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2018-12-03 06:47:41,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-12-03 06:47:41,640 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,642 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,651 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:43, output treesize:5 [2018-12-03 06:47:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:41,654 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:41,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2018-12-03 06:47:41,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-12-03 06:47:41,695 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,700 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:41,701 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:41,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-03 06:47:41,702 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:41,704 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:41,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:41,707 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2018-12-03 06:47:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:41,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:47:41,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2018-12-03 06:47:41,744 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:47:41,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 06:47:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 06:47:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2018-12-03 06:47:41,745 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 16 states. [2018-12-03 06:47:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:42,149 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2018-12-03 06:47:42,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 06:47:42,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2018-12-03 06:47:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:42,152 INFO L225 Difference]: With dead ends: 71 [2018-12-03 06:47:42,152 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 06:47:42,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2018-12-03 06:47:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 06:47:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2018-12-03 06:47:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-03 06:47:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-12-03 06:47:42,160 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 40 [2018-12-03 06:47:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:42,161 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-12-03 06:47:42,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 06:47:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-12-03 06:47:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:47:42,162 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:42,162 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:42,162 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:42,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:42,162 INFO L82 PathProgramCache]: Analyzing trace with hash 18299409, now seen corresponding path program 2 times [2018-12-03 06:47:42,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:47:42,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:42,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:42,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:42,164 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:47:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:42,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:42,306 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:47:42,307 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 06:47:42,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 06:47:42,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:42,307 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:42,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 06:47:42,313 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 06:47:42,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 06:47:42,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:47:42,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:42,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-12-03 06:47:42,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-12-03 06:47:42,473 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:42,474 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:42,476 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:42,477 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2018-12-03 06:47:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 06:47:42,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:42,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2018-12-03 06:47:42,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-12-03 06:47:42,590 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:42,594 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:42,595 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:42,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-03 06:47:42,596 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:42,600 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:42,602 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:42,602 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2018-12-03 06:47:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:42,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:47:42,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2018-12-03 06:47:42,668 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:47:42,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 06:47:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 06:47:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2018-12-03 06:47:42,669 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 24 states. [2018-12-03 06:47:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:43,009 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2018-12-03 06:47:43,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 06:47:43,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2018-12-03 06:47:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:43,010 INFO L225 Difference]: With dead ends: 82 [2018-12-03 06:47:43,010 INFO L226 Difference]: Without dead ends: 74 [2018-12-03 06:47:43,011 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 06:47:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-03 06:47:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2018-12-03 06:47:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-03 06:47:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2018-12-03 06:47:43,017 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 42 [2018-12-03 06:47:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:43,017 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2018-12-03 06:47:43,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 06:47:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2018-12-03 06:47:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:47:43,018 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:43,018 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:43,018 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:43,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:43,018 INFO L82 PathProgramCache]: Analyzing trace with hash 80339023, now seen corresponding path program 1 times [2018-12-03 06:47:43,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:47:43,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:43,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 06:47:43,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:43,019 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:47:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:47:43,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:43,096 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:47:43,096 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-12-03 06:47:43,096 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [3], [6], [8], [10], [11], [17], [19], [21], [24], [30], [35], [38], [40], [45], [48], [55], [58], [59], [60], [61], [62], [64], [65], [66], [67], [68], [69], [70], [71], [72], [73] [2018-12-03 06:47:43,098 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 06:47:43,098 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 06:47:43,132 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 06:47:43,132 INFO L272 AbstractInterpreter]: Visited 34 different actions 45 times. Merged at 1 different actions 3 times. Never widened. Performed 352 root evaluator evaluations with a maximum evaluation depth of 5. Performed 352 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 4 fixpoints after 2 different actions. Largest state had 40 variables. [2018-12-03 06:47:43,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:43,142 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 06:47:43,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:43,142 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:43,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:43,148 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 06:47:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:43,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:43,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-12-03 06:47:43,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-12-03 06:47:43,177 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:43,177 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:43,178 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:43,178 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-12-03 06:47:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-03 06:47:43,229 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:47:43,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:47:43,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2018-12-03 06:47:43,312 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:47:43,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 06:47:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 06:47:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2018-12-03 06:47:43,313 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 16 states. [2018-12-03 06:47:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:43,527 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2018-12-03 06:47:43,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 06:47:43,527 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-12-03 06:47:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:43,527 INFO L225 Difference]: With dead ends: 82 [2018-12-03 06:47:43,528 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 06:47:43,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2018-12-03 06:47:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 06:47:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2018-12-03 06:47:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-03 06:47:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2018-12-03 06:47:43,536 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 42 [2018-12-03 06:47:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:43,536 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2018-12-03 06:47:43,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 06:47:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2018-12-03 06:47:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:47:43,537 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:43,538 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:43,538 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:43,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash 293059023, now seen corresponding path program 2 times [2018-12-03 06:47:43,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:47:43,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:43,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:43,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:47:43,539 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:47:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:47:43,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:43,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:47:43,614 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 06:47:43,615 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 06:47:43,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:43,615 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:43,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 06:47:43,622 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 06:47:43,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 06:47:43,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:47:43,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:43,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2018-12-03 06:47:43,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2018-12-03 06:47:43,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:43,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-12-03 06:47:43,706 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:43,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:43,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 25 [2018-12-03 06:47:43,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:43,923 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:43,925 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: v_arrayElimArr_5 input size 12 context size 12 output size 12 at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:452) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:221) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:225) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:225) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:225) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.elimAllRec(ElimStorePlain.java:199) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:293) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-03 06:47:43,931 INFO L168 Benchmark]: Toolchain (without parser) took 3912.54 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 322.4 MB). Free memory was 949.7 MB in the beginning and 1.3 GB in the end (delta: -316.8 MB). Peak memory consumption was 5.6 MB. Max. memory is 11.5 GB. [2018-12-03 06:47:43,933 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:47:43,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.93 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:47:43,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.68 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 936.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:47:43,935 INFO L168 Benchmark]: Boogie Preprocessor took 45.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-03 06:47:43,936 INFO L168 Benchmark]: RCFGBuilder took 151.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-03 06:47:43,937 INFO L168 Benchmark]: TraceAbstraction took 3557.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -152.5 MB). Peak memory consumption was 29.0 MB. Max. memory is 11.5 GB. [2018-12-03 06:47:43,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.93 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.68 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 936.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 45.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 151.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3557.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -152.5 MB). Peak memory consumption was 29.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: v_arrayElimArr_5 input size 12 context size 12 output size 12 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: v_arrayElimArr_5 input size 12 context size 12 output size 12: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:452) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-03 06:47:45,206 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 06:47:45,207 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 06:47:45,213 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 06:47:45,213 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 06:47:45,214 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 06:47:45,214 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 06:47:45,215 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 06:47:45,216 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 06:47:45,216 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 06:47:45,217 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 06:47:45,217 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 06:47:45,217 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 06:47:45,218 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 06:47:45,218 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 06:47:45,219 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 06:47:45,219 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 06:47:45,220 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 06:47:45,221 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 06:47:45,222 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 06:47:45,222 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 06:47:45,223 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 06:47:45,224 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 06:47:45,224 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 06:47:45,224 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 06:47:45,225 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 06:47:45,225 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 06:47:45,226 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 06:47:45,226 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 06:47:45,227 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 06:47:45,227 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 06:47:45,227 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 06:47:45,227 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 06:47:45,227 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 06:47:45,228 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 06:47:45,228 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 06:47:45,228 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-03 06:47:45,236 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 06:47:45,236 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 06:47:45,236 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 06:47:45,236 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 06:47:45,237 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 06:47:45,237 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 06:47:45,237 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 06:47:45,237 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 06:47:45,237 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 06:47:45,237 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 06:47:45,237 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 06:47:45,237 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-03 06:47:45,238 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 06:47:45,238 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:47:45,239 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-03 06:47:45,239 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-03 06:47:45,240 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/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 -> efd11941ceab8dc56d9aa56f1950f714738654ba [2018-12-03 06:47:45,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 06:47:45,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 06:47:45,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 06:47:45,271 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 06:47:45,271 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 06:47:45,272 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-regression/test22_true-unreach-call.c [2018-12-03 06:47:45,306 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/a09e00aa6/c16eb23cc4a84aa49da37f94bf5118d3/FLAG44b29220b [2018-12-03 06:47:45,754 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 06:47:45,755 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/sv-benchmarks/c/ldv-regression/test22_true-unreach-call.c [2018-12-03 06:47:45,759 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/a09e00aa6/c16eb23cc4a84aa49da37f94bf5118d3/FLAG44b29220b [2018-12-03 06:47:46,140 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/data/a09e00aa6/c16eb23cc4a84aa49da37f94bf5118d3 [2018-12-03 06:47:46,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 06:47:46,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 06:47:46,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 06:47:46,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 06:47:46,146 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 06:47:46,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45734aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46, skipping insertion in model container [2018-12-03 06:47:46,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 06:47:46,163 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 06:47:46,261 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:47:46,267 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 06:47:46,278 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:47:46,288 INFO L195 MainTranslator]: Completed translation [2018-12-03 06:47:46,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46 WrapperNode [2018-12-03 06:47:46,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 06:47:46,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 06:47:46,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 06:47:46,289 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 06:47:46,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 06:47:46,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 06:47:46,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 06:47:46,303 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 06:47:46,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... [2018-12-03 06:47:46,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 06:47:46,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 06:47:46,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 06:47:46,321 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 06:47:46,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:47:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure init [2018-12-03 06:47:46,383 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2018-12-03 06:47:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 06:47:46,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 06:47:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2018-12-03 06:47:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-12-03 06:47:46,384 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-12-03 06:47:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 06:47:46,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 06:47:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 06:47:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-03 06:47:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2018-12-03 06:47:46,384 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2018-12-03 06:47:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 06:47:46,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 06:47:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-03 06:47:46,523 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 06:47:46,523 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 06:47:46,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:47:46 BoogieIcfgContainer [2018-12-03 06:47:46,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 06:47:46,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 06:47:46,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 06:47:46,525 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 06:47:46,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 06:47:46" (1/3) ... [2018-12-03 06:47:46,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed2f019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:47:46, skipping insertion in model container [2018-12-03 06:47:46,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:47:46" (2/3) ... [2018-12-03 06:47:46,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed2f019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:47:46, skipping insertion in model container [2018-12-03 06:47:46,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:47:46" (3/3) ... [2018-12-03 06:47:46,527 INFO L112 eAbstractionObserver]: Analyzing ICFG test22_true-unreach-call.c [2018-12-03 06:47:46,532 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 06:47:46,537 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 06:47:46,545 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 06:47:46,562 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-03 06:47:46,562 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 06:47:46,562 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 06:47:46,562 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 06:47:46,562 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 06:47:46,562 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 06:47:46,562 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 06:47:46,562 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 06:47:46,563 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 06:47:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-12-03 06:47:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 06:47:46,577 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:46,577 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:46,578 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:46,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 80965718, now seen corresponding path program 1 times [2018-12-03 06:47:46,584 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:47:46,584 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:47:46,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:46,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:46,666 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:47:46,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:47:46,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 06:47:46,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-03 06:47:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-03 06:47:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:47:46,681 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2018-12-03 06:47:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:46,694 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2018-12-03 06:47:46,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-03 06:47:46,694 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-12-03 06:47:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:46,699 INFO L225 Difference]: With dead ends: 47 [2018-12-03 06:47:46,699 INFO L226 Difference]: Without dead ends: 30 [2018-12-03 06:47:46,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:47:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-03 06:47:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-03 06:47:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 06:47:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-03 06:47:46,730 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 36 [2018-12-03 06:47:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:46,731 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-03 06:47:46,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-03 06:47:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-03 06:47:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 06:47:46,732 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:46,732 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:46,732 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:46,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 76840485, now seen corresponding path program 1 times [2018-12-03 06:47:46,733 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:47:46,733 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:47:46,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:46,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:47,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2018-12-03 06:47:47,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:47:47,020 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,026 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,032 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,032 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2018-12-03 06:47:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 06:47:47,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:47,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2018-12-03 06:47:47,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2018-12-03 06:47:47,182 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:47:47,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2018-12-03 06:47:47,213 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:47:47,243 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:47,244 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:47,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2018-12-03 06:47:47,248 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,264 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:47,268 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:47,268 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2018-12-03 06:47:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:47,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:47,485 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:47,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:47,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:47,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2018-12-03 06:47:47,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:47:47,633 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,639 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,644 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,644 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:11 [2018-12-03 06:47:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:47,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:47,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2018-12-03 06:47:47,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2018-12-03 06:47:47,672 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:47:47,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-12-03 06:47:47,700 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:47:47,732 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:47,735 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:47,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2018-12-03 06:47:47,738 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:47,756 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:47,760 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:47,760 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2018-12-03 06:47:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:47,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:47:47,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11, 11] total 23 [2018-12-03 06:47:47,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-03 06:47:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-03 06:47:47,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2018-12-03 06:47:47,843 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 23 states. [2018-12-03 06:47:48,719 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2018-12-03 06:47:49,258 WARN L180 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-12-03 06:47:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:49,738 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2018-12-03 06:47:49,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 06:47:49,739 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2018-12-03 06:47:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:49,741 INFO L225 Difference]: With dead ends: 87 [2018-12-03 06:47:49,742 INFO L226 Difference]: Without dead ends: 80 [2018-12-03 06:47:49,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2018-12-03 06:47:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-03 06:47:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 45. [2018-12-03 06:47:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-03 06:47:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2018-12-03 06:47:49,755 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 37 [2018-12-03 06:47:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:49,755 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2018-12-03 06:47:49,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-03 06:47:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2018-12-03 06:47:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 06:47:49,757 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:49,757 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:49,757 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:49,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:49,757 INFO L82 PathProgramCache]: Analyzing trace with hash 499542311, now seen corresponding path program 1 times [2018-12-03 06:47:49,757 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:47:49,758 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:47:49,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:49,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:49,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-12-03 06:47:49,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-12-03 06:47:49,829 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:49,830 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:49,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:49,832 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-12-03 06:47:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 06:47:49,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:47:49,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:49,965 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:49,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:49,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:49,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-12-03 06:47:49,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-12-03 06:47:49,994 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:49,995 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:49,996 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:49,996 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-12-03 06:47:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 06:47:50,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:47:50,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:47:50,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12] total 14 [2018-12-03 06:47:50,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 06:47:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 06:47:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-12-03 06:47:50,059 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 14 states. [2018-12-03 06:47:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:50,427 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2018-12-03 06:47:50,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 06:47:50,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-12-03 06:47:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:50,428 INFO L225 Difference]: With dead ends: 69 [2018-12-03 06:47:50,428 INFO L226 Difference]: Without dead ends: 50 [2018-12-03 06:47:50,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2018-12-03 06:47:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-03 06:47:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-12-03 06:47:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 06:47:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-12-03 06:47:50,435 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 37 [2018-12-03 06:47:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:50,435 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-12-03 06:47:50,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 06:47:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-12-03 06:47:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 06:47:50,436 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:50,436 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:50,436 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:50,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2000068519, now seen corresponding path program 2 times [2018-12-03 06:47:50,436 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:47:50,436 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:47:50,449 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-03 06:47:50,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-03 06:47:50,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:47:50,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:50,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2018-12-03 06:47:50,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:47:50,568 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,575 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2018-12-03 06:47:50,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:47:50,610 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,616 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,630 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:57, output treesize:11 [2018-12-03 06:47:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:50,651 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:47:50,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:47:50,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-03 06:47:50,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 06:47:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 06:47:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-03 06:47:50,654 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 6 states. [2018-12-03 06:47:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:50,769 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2018-12-03 06:47:50,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 06:47:50,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2018-12-03 06:47:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:50,770 INFO L225 Difference]: With dead ends: 53 [2018-12-03 06:47:50,770 INFO L226 Difference]: Without dead ends: 46 [2018-12-03 06:47:50,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-03 06:47:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-03 06:47:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2018-12-03 06:47:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 06:47:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-12-03 06:47:50,777 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 37 [2018-12-03 06:47:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:50,777 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-12-03 06:47:50,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 06:47:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-12-03 06:47:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-03 06:47:50,778 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:50,778 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:50,778 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:50,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash 959865804, now seen corresponding path program 1 times [2018-12-03 06:47:50,779 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:47:50,779 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:47:50,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 06:47:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:50,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:50,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-12-03 06:47:50,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-12-03 06:47:50,848 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,849 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,849 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:50,850 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-12-03 06:47:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:47:50,909 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 06:47:50,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:50,984 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:50,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:47:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:51,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:51,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-12-03 06:47:51,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-12-03 06:47:51,012 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,014 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,018 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,018 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-12-03 06:47:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:47:51,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 06:47:51,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:47:51,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12] total 14 [2018-12-03 06:47:51,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 06:47:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 06:47:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-12-03 06:47:51,076 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 14 states. [2018-12-03 06:47:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:51,422 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2018-12-03 06:47:51,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:47:51,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2018-12-03 06:47:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:51,423 INFO L225 Difference]: With dead ends: 68 [2018-12-03 06:47:51,423 INFO L226 Difference]: Without dead ends: 52 [2018-12-03 06:47:51,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2018-12-03 06:47:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-03 06:47:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2018-12-03 06:47:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 06:47:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2018-12-03 06:47:51,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 39 [2018-12-03 06:47:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:51,430 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2018-12-03 06:47:51,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 06:47:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2018-12-03 06:47:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-03 06:47:51,430 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:51,431 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:51,431 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:51,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:51,431 INFO L82 PathProgramCache]: Analyzing trace with hash -845572530, now seen corresponding path program 2 times [2018-12-03 06:47:51,431 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:47:51,431 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:47:51,452 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-03 06:47:51,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-03 06:47:51,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:47:51,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:51,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2018-12-03 06:47:51,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:47:51,675 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,682 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2018-12-03 06:47:51,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:47:51,707 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,713 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:51,728 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:57, output treesize:11 [2018-12-03 06:47:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:51,755 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:52,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2018-12-03 06:47:52,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2018-12-03 06:47:52,044 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:47:52,097 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:52,102 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:52,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2018-12-03 06:47:52,105 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:52,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2018-12-03 06:47:52,132 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:47:52,158 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:52,168 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:47:52,168 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:38, output treesize:13 [2018-12-03 06:47:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:47:52,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:47:52,212 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:47:52,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-03 06:47:52,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-03 06:47:52,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:47:52,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:52,417 WARN L180 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-12-03 06:47:52,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2018-12-03 06:47:52,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2018-12-03 06:47:52,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:52,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2018-12-03 06:47:52,442 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:52,463 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:52,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2018-12-03 06:47:52,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:52,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2018-12-03 06:47:52,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:52,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:52,581 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:52,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 45 [2018-12-03 06:47:52,587 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:52,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:52,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:52,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 59 [2018-12-03 06:47:52,795 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2018-12-03 06:47:52,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:52,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:53,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:53,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 47 [2018-12-03 06:47:53,007 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,075 INFO L267 ElimStorePlain]: Start of recursive call 6: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-12-03 06:47:53,149 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-12-03 06:47:53,320 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2018-12-03 06:47:53,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2018-12-03 06:47:53,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2018-12-03 06:47:53,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:53,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-12-03 06:47:53,363 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,377 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 34 [2018-12-03 06:47:53,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2018-12-03 06:47:53,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 06:47:53,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-12-03 06:47:53,425 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,438 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,458 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,476 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:53,566 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 5 variables, input treesize:42, output treesize:1 [2018-12-03 06:47:54,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2018-12-03 06:47:54,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:47:54,060 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:54,064 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:54,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:54,069 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:11 [2018-12-03 06:47:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:47:54,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:54,603 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2018-12-03 06:47:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:47:55,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:47:55,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 13, 15] total 32 [2018-12-03 06:47:55,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 06:47:55,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 06:47:55,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2018-12-03 06:47:55,197 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 32 states. [2018-12-03 06:47:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:47:58,465 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2018-12-03 06:47:58,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 06:47:58,466 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2018-12-03 06:47:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:47:58,467 INFO L225 Difference]: With dead ends: 69 [2018-12-03 06:47:58,467 INFO L226 Difference]: Without dead ends: 62 [2018-12-03 06:47:58,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 06:47:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-03 06:47:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2018-12-03 06:47:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-03 06:47:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-12-03 06:47:58,475 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 39 [2018-12-03 06:47:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:47:58,475 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-12-03 06:47:58,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 06:47:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-12-03 06:47:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-03 06:47:58,476 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:47:58,476 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:47:58,476 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:47:58,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:47:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash 344895801, now seen corresponding path program 1 times [2018-12-03 06:47:58,476 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:47:58,476 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:47:58,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 06:47:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:47:58,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:47:58,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2018-12-03 06:47:58,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2018-12-03 06:47:58,978 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:47:58,988 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:58,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:47:58,997 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2018-12-03 06:47:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 06:47:59,066 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:47:59,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2018-12-03 06:47:59,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2018-12-03 06:47:59,929 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:47:59,988 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:59,992 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:47:59,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2018-12-03 06:47:59,995 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:48:00,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-12-03 06:48:00,022 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:48:00,046 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:48:00,049 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:48:00,050 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:36, output treesize:7 [2018-12-03 06:48:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:48:00,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:48:00,378 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:48:00,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:48:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:48:00,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:48:01,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2018-12-03 06:48:01,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2018-12-03 06:48:01,585 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 06:48:01,592 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:48:01,600 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-03 06:48:01,600 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:11 [2018-12-03 06:48:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:48:01,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:48:02,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2018-12-03 06:48:02,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2018-12-03 06:48:02,385 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:48:02,483 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:48:02,488 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:48:02,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2018-12-03 06:48:02,492 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-03 06:48:02,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-12-03 06:48:02,518 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:48:02,543 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:48:02,546 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:48:02,546 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:50, output treesize:7 [2018-12-03 06:48:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:48:02,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:48:02,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17] total 44 [2018-12-03 06:48:02,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 06:48:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 06:48:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 06:48:02,609 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 44 states. [2018-12-03 06:48:08,277 WARN L180 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2018-12-03 06:48:08,861 WARN L180 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-12-03 06:48:09,387 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2018-12-03 06:48:09,951 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2018-12-03 06:48:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:48:11,828 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2018-12-03 06:48:11,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-03 06:48:11,829 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 45 [2018-12-03 06:48:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:48:11,829 INFO L225 Difference]: With dead ends: 83 [2018-12-03 06:48:11,830 INFO L226 Difference]: Without dead ends: 76 [2018-12-03 06:48:11,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=951, Invalid=4599, Unknown=0, NotChecked=0, Total=5550 [2018-12-03 06:48:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-03 06:48:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2018-12-03 06:48:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-03 06:48:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2018-12-03 06:48:11,839 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 45 [2018-12-03 06:48:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:48:11,839 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2018-12-03 06:48:11,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 06:48:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2018-12-03 06:48:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-03 06:48:11,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:48:11,840 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:48:11,840 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:48:11,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:48:11,840 INFO L82 PathProgramCache]: Analyzing trace with hash 837914722, now seen corresponding path program 3 times [2018-12-03 06:48:11,840 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 06:48:11,840 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 06:48:11,854 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-03 06:48:11,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 06:48:11,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:48:11,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:48:21,003 WARN L180 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 32 [2018-12-03 06:48:40,196 WARN L180 SmtUtils]: Spent 19.10 s on a formula simplification that was a NOOP. DAG size: 47 [2018-12-03 06:49:06,169 WARN L180 SmtUtils]: Spent 19.88 s on a formula simplification that was a NOOP. DAG size: 75 [2018-12-03 06:49:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-12-03 06:49:07,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:49:08,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2018-12-03 06:49:08,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2018-12-03 06:49:08,797 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:49:08,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2018-12-03 06:49:08,850 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:49:08,915 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:49:08,925 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:49:08,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2018-12-03 06:49:08,927 INFO L267 ElimStorePlain]: Start of recursive call 5: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-03 06:49:09,013 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2018-12-03 06:49:09,093 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:49:09,093 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2018-12-03 06:49:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-12-03 06:49:09,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:49:09,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:49:09,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 06:49:09,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 06:49:09,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:49:09,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:49:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:49:37,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:49:37,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2018-12-03 06:49:37,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2018-12-03 06:49:37,554 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:49:37,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2018-12-03 06:49:37,601 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 06:49:37,667 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:49:37,750 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 06:49:37,751 INFO L303 Elim1Store]: Index analysis took 101 ms [2018-12-03 06:49:37,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2018-12-03 06:49:37,752 INFO L267 ElimStorePlain]: Start of recursive call 5: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-03 06:49:37,836 INFO L267 ElimStorePlain]: Start of recursive call 2: 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2018-12-03 06:49:37,891 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-03 06:49:37,891 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:35, output treesize:7 [2018-12-03 06:49:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:49:37,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:49:37,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 17, 16] total 36 [2018-12-03 06:49:37,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 06:49:37,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 06:49:37,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1115, Unknown=10, NotChecked=0, Total=1260 [2018-12-03 06:49:37,961 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 36 states. [2018-12-03 06:50:18,469 WARN L180 SmtUtils]: Spent 17.93 s on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2018-12-03 06:50:40,950 WARN L180 SmtUtils]: Spent 18.27 s on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2018-12-03 06:50:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:50:43,897 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-12-03 06:50:43,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 06:50:43,897 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2018-12-03 06:50:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:50:43,897 INFO L225 Difference]: With dead ends: 74 [2018-12-03 06:50:43,897 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 06:50:43,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 132.9s TimeCoverageRelationStatistics Valid=337, Invalid=2100, Unknown=13, NotChecked=0, Total=2450 [2018-12-03 06:50:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 06:50:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 06:50:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 06:50:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 06:50:43,898 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2018-12-03 06:50:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:50:43,898 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 06:50:43,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 06:50:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 06:50:43,898 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 06:50:43,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 06:50:44,012 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 06:50:44,013 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 06:50:44,387 WARN L180 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2018-12-03 06:50:45,627 WARN L180 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 123 DAG size of output: 35 [2018-12-03 06:50:53,602 WARN L180 SmtUtils]: Spent 7.96 s on a formula simplification. DAG size of input: 50 DAG size of output: 1 [2018-12-03 06:50:53,741 INFO L448 ceAbstractionStarter]: For program point initEXIT(lines 11 18) no Hoare annotation was computed. [2018-12-03 06:50:53,741 INFO L451 ceAbstractionStarter]: At program point initENTRY(lines 11 18) the Hoare annotation is: true [2018-12-03 06:50:53,741 INFO L448 ceAbstractionStarter]: For program point initFINAL(lines 11 18) no Hoare annotation was computed. [2018-12-03 06:50:53,741 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-03 06:50:53,741 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-03 06:50:53,741 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point get_dummyFINAL(lines 20 23) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L451 ceAbstractionStarter]: At program point get_dummyENTRY(lines 20 23) the Hoare annotation is: true [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point get_dummyEXIT(lines 20 23) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L444 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (not (= |~#d1~0.base| |~#d2~0.base|)) (= (_ bv0 32) |~#d1~0.offset|)) [2018-12-03 06:50:53,742 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point L33(line 33) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point L35-2(lines 35 44) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L444 ceAbstractionStarter]: At program point L33-1(line 33) the Hoare annotation is: (or (= |~#d1~0.base| |~#d2~0.base|) (not (= (_ bv0 32) |~#d1~0.offset|)) (and (= |~#d1~0.base| main_~pd1~0.base) (= main_~pd1~0.offset |~#d1~0.offset|)) (and (= main_~pd1~0.base |~#d2~0.base|) (= main_~pd1~0.offset |~#d2~0.offset|))) [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point L33-2(line 33) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point L35-4(lines 35 44) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L444 ceAbstractionStarter]: At program point L33-3(line 33) the Hoare annotation is: (or (= |~#d1~0.base| |~#d2~0.base|) (not (= main_~pd2~0.base main_~pd1~0.base)) (let ((.cse0 (= main_~pd1~0.offset main_~pd2~0.offset))) (or (and .cse0 (= main_~pd1~0.base |~#d2~0.base|) (= main_~pd1~0.offset |~#d2~0.offset|)) (and (= |~#d1~0.base| main_~pd1~0.base) .cse0 (= main_~pd1~0.offset |~#d1~0.offset|)))) (not (= (_ bv0 32) |~#d1~0.offset|))) [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point L33-4(line 33) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 30 50) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 30 50) no Hoare annotation was computed. [2018-12-03 06:50:53,742 INFO L444 ceAbstractionStarter]: At program point L42(lines 31 50) the Hoare annotation is: (or (= |~#d1~0.base| |~#d2~0.base|) (not (= (_ bv0 32) |~#d1~0.offset|))) [2018-12-03 06:50:53,742 INFO L448 ceAbstractionStarter]: For program point L38-1(lines 38 40) no Hoare annotation was computed. [2018-12-03 06:50:53,743 INFO L444 ceAbstractionStarter]: At program point L38-3(lines 38 40) the Hoare annotation is: (or (and (bvslt (bvadd main_~i~0 (_ bv4294967295 32)) (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (= main_~pd2~0.offset main_~pa~0.offset) (= main_~pd2~0.base main_~pa~0.base) (and (= main_~pd2~0.base main_~pd1~0.base) (= main_~pd1~0.offset main_~pd2~0.offset)) (or (not (= (_ bv0 32) main_~pa~0.base)) (not (= (_ bv0 32) main_~pa~0.offset))) (bvsgt (select (select |#memory_int| main_~pd2~0.base) main_~pd2~0.offset) (_ bv0 32))) (not (= (_ bv0 32) |~#d1~0.offset|)) (= |~#d1~0.base| |~#d2~0.base|)) [2018-12-03 06:50:53,743 INFO L444 ceAbstractionStarter]: At program point L38-4(lines 38 40) the Hoare annotation is: (or (= |~#d1~0.base| |~#d2~0.base|) (not (= (_ bv0 32) |~#d1~0.offset|)) (let ((.cse0 (select (select |#memory_int| main_~pd2~0.base) main_~pd2~0.offset))) (and (= main_~pd2~0.offset main_~pa~0.offset) (= main_~pd2~0.base main_~pa~0.base) (and (= main_~pd2~0.base main_~pd1~0.base) (= main_~pd1~0.offset main_~pd2~0.offset)) (bvslt (bvadd main_~i~0 (_ bv4294967295 32)) .cse0) (bvsgt .cse0 (_ bv0 32)) (or (not (= main_~pd2~0.base (_ bv0 32))) (not (= main_~pd2~0.offset (_ bv0 32)))) (not (bvslt main_~i~0 .cse0))))) [2018-12-03 06:50:53,743 INFO L451 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: true [2018-12-03 06:50:53,743 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 30 50) the Hoare annotation is: true [2018-12-03 06:50:53,743 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2018-12-03 06:50:53,743 INFO L448 ceAbstractionStarter]: For program point L41(lines 41 43) no Hoare annotation was computed. [2018-12-03 06:50:53,743 INFO L448 ceAbstractionStarter]: For program point L35(line 35) no Hoare annotation was computed. [2018-12-03 06:50:53,743 INFO L451 ceAbstractionStarter]: At program point checkENTRY(lines 25 28) the Hoare annotation is: true [2018-12-03 06:50:53,743 INFO L448 ceAbstractionStarter]: For program point checkFINAL(lines 25 28) no Hoare annotation was computed. [2018-12-03 06:50:53,743 INFO L448 ceAbstractionStarter]: For program point checkEXIT(lines 25 28) no Hoare annotation was computed. [2018-12-03 06:50:53,747 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-12-03 06:50:53,748 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-12-03 06:50:53,751 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-12-03 06:50:53,751 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-12-03 06:50:53,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 06:50:53 BoogieIcfgContainer [2018-12-03 06:50:53,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 06:50:53,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 06:50:53,754 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 06:50:53,754 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 06:50:53,754 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:47:46" (3/4) ... [2018-12-03 06:50:53,756 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 06:50:53,760 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure init [2018-12-03 06:50:53,760 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 06:50:53,760 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure get_dummy [2018-12-03 06:50:53,761 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 06:50:53,761 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2018-12-03 06:50:53,764 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2018-12-03 06:50:53,764 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-03 06:50:53,764 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 06:50:53,764 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 06:50:53,792 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_952ba657-1f0f-40a6-8654-47a808f41e7c/bin-2019/utaipan/witness.graphml [2018-12-03 06:50:53,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 06:50:53,793 INFO L168 Benchmark]: Toolchain (without parser) took 187650.74 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 307.8 MB). Free memory was 943.4 MB in the beginning and 1.0 GB in the end (delta: -101.9 MB). Peak memory consumption was 205.8 MB. Max. memory is 11.5 GB. [2018-12-03 06:50:53,793 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:50:53,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.63 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:50:53,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.01 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-03 06:50:53,793 INFO L168 Benchmark]: Boogie Preprocessor took 17.23 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:50:53,794 INFO L168 Benchmark]: RCFGBuilder took 202.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -165.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 11.5 GB. [2018-12-03 06:50:53,794 INFO L168 Benchmark]: TraceAbstraction took 187229.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 179.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.7 MB). Peak memory consumption was 217.5 MB. Max. memory is 11.5 GB. [2018-12-03 06:50:53,794 INFO L168 Benchmark]: Witness Printer took 38.76 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:50:53,795 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 145.63 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.01 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.23 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 202.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -165.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 187229.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 179.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.7 MB). Peak memory consumption was 217.5 MB. Max. memory is 11.5 GB. * Witness Printer took 38.76 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant [2018-12-03 06:50:53,797 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-12-03 06:50:53,797 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-12-03 06:50:53,797 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-12-03 06:50:53,797 WARN L1298 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((((~bvslt32(~bvadd64(i, 4294967295bv32), unknown-#memory_int-unknown[pa][pa]) && pd2 == pa) && pd2 == pa) && pd2 == pd1 && pd1 == pd2) && (!(0bv32 == pa) || !(0bv32 == pa))) && ~bvsgt32(unknown-#memory_int-unknown[pd2][pd2], 0bv32)) || !(0bv32 == d1)) || d1 == d2 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: d1 == d2 || !(0bv32 == d1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. SAFE Result, 187.1s OverallTime, 8 OverallIterations, 6 TraceHistogramMax, 81.1s AutomataDifference, 0.0s DeadEndRemovalTime, 9.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 271 SDtfs, 317 SDslu, 2332 SDs, 0 SdLazy, 2621 SolverSat, 243 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 21.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1134 GetRequests, 872 SyntacticMatches, 10 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 149.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 86 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 27 PreInvPairs, 50 NumberOfFragments, 180 HoareAnnotationTreeSize, 27 FomulaSimplifications, 27947 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 13 FomulaSimplificationsInter, 2859 FormulaSimplificationTreeSizeReductionInter, 9.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 94.9s InterpolantComputationTime, 561 NumberOfCodeBlocks, 537 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1023 ConstructedInterpolants, 31 QuantifiedInterpolants, 272367 SizeOfPredicates, 153 NumberOfNonLiveVariables, 1519 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 243/528 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...