./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.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_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 9cd87c15c4637a3ecd407847e5a675763d5fece5 .................................................................................................................................................................................................................................................. 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_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 9cd87c15c4637a3ecd407847e5a675763d5fece5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 00:20:30,971 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 00:20:30,972 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 00:20:30,978 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 00:20:30,978 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 00:20:30,979 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 00:20:30,979 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 00:20:30,980 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 00:20:30,981 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 00:20:30,981 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 00:20:30,982 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 00:20:30,982 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 00:20:30,982 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 00:20:30,983 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 00:20:30,983 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 00:20:30,983 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 00:20:30,984 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 00:20:30,985 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 00:20:30,986 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 00:20:30,986 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 00:20:30,987 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 00:20:30,987 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 00:20:30,989 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 00:20:30,989 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 00:20:30,989 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 00:20:30,989 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 00:20:30,990 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 00:20:30,990 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 00:20:30,991 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 00:20:30,991 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 00:20:30,991 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 00:20:30,992 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 00:20:30,992 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 00:20:30,992 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 00:20:30,992 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 00:20:30,993 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 00:20:30,993 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 00:20:31,000 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 00:20:31,000 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 00:20:31,000 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 00:20:31,001 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 00:20:31,001 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 00:20:31,002 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 00:20:31,002 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 00:20:31,003 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 00:20:31,003 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 00:20:31,003 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 00:20:31,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 00:20:31,004 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 00:20:31,004 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_b4105352-2670-435a-9563-8b834a3bc698/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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-12-09 00:20:31,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 00:20:31,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 00:20:31,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 00:20:31,034 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 00:20:31,035 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 00:20:31,035 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-09 00:20:31,074 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/fc11e386c/bb4fc36cea0344a3b70db8f8591f1286/FLAG4846c1756 [2018-12-09 00:20:31,499 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 00:20:31,499 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-09 00:20:31,503 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/fc11e386c/bb4fc36cea0344a3b70db8f8591f1286/FLAG4846c1756 [2018-12-09 00:20:31,512 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/fc11e386c/bb4fc36cea0344a3b70db8f8591f1286 [2018-12-09 00:20:31,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 00:20:31,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 00:20:31,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 00:20:31,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 00:20:31,518 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 00:20:31,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf0b28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31, skipping insertion in model container [2018-12-09 00:20:31,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 00:20:31,533 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 00:20:31,614 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:20:31,616 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 00:20:31,624 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:20:31,632 INFO L195 MainTranslator]: Completed translation [2018-12-09 00:20:31,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31 WrapperNode [2018-12-09 00:20:31,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 00:20:31,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 00:20:31,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 00:20:31,633 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 00:20:31,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 00:20:31,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 00:20:31,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 00:20:31,645 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 00:20:31,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... [2018-12-09 00:20:31,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 00:20:31,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 00:20:31,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 00:20:31,683 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 00:20:31,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:31,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 00:20:31,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 00:20:31,718 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-12-09 00:20:31,718 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-12-09 00:20:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 00:20:31,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 00:20:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 00:20:31,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 00:20:31,811 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 00:20:31,812 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 00:20:31,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:31 BoogieIcfgContainer [2018-12-09 00:20:31,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 00:20:31,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 00:20:31,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 00:20:31,815 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 00:20:31,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:20:31" (1/3) ... [2018-12-09 00:20:31,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b7966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:31, skipping insertion in model container [2018-12-09 00:20:31,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:31" (2/3) ... [2018-12-09 00:20:31,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b7966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:31, skipping insertion in model container [2018-12-09 00:20:31,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:31" (3/3) ... [2018-12-09 00:20:31,817 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-12-09 00:20:31,823 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 00:20:31,828 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 00:20:31,838 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 00:20:31,860 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 00:20:31,860 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 00:20:31,860 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 00:20:31,860 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 00:20:31,860 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 00:20:31,860 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 00:20:31,860 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 00:20:31,860 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 00:20:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-12-09 00:20:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 00:20:31,876 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:31,876 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:31,878 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:31,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2018-12-09 00:20:31,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:20:31,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:20:31,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:20:31,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:20:31,910 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:20:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:20:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:20:31,962 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 00:20:31,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:20:31 BoogieIcfgContainer [2018-12-09 00:20:31,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 00:20:31,980 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 00:20:31,980 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 00:20:31,980 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 00:20:31,980 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:31" (3/4) ... [2018-12-09 00:20:31,983 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 00:20:31,983 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 00:20:31,983 INFO L168 Benchmark]: Toolchain (without parser) took 469.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 958.8 MB in the beginning and 1.1 GB in the end (delta: -151.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:20:31,985 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:20:31,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 116.85 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 947.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-09 00:20:31,986 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.70 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:20:31,986 INFO L168 Benchmark]: Boogie Preprocessor took 38.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -197.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-12-09 00:20:31,987 INFO L168 Benchmark]: RCFGBuilder took 129.12 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: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-12-09 00:20:31,987 INFO L168 Benchmark]: TraceAbstraction took 166.64 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-12-09 00:20:31,988 INFO L168 Benchmark]: Witness Printer took 3.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:20:31,990 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 116.85 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 947.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.70 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -197.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 129.12 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: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 166.64 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * Witness Printer took 3.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 31. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) VAL [n=1] [L29] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] return 1; VAL [\old(n)=1, \result=1, n=1] [L29] RET, EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-12-09 00:20:33,402 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 00:20:33,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 00:20:33,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 00:20:33,412 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 00:20:33,413 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 00:20:33,413 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-09 00:20:33,449 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/a6a0a1bbc/ebaa0f42ff854b08af23efe37e974888/FLAGe5c3412a0 [2018-12-09 00:20:33,789 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 00:20:33,789 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-09 00:20:33,793 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/a6a0a1bbc/ebaa0f42ff854b08af23efe37e974888/FLAGe5c3412a0 [2018-12-09 00:20:34,190 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/data/a6a0a1bbc/ebaa0f42ff854b08af23efe37e974888 [2018-12-09 00:20:34,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 00:20:34,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 00:20:34,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 00:20:34,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 00:20:34,196 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 00:20:34,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488fada1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34, skipping insertion in model container [2018-12-09 00:20:34,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 00:20:34,216 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 00:20:34,299 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:20:34,302 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 00:20:34,310 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:20:34,319 INFO L195 MainTranslator]: Completed translation [2018-12-09 00:20:34,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34 WrapperNode [2018-12-09 00:20:34,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 00:20:34,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 00:20:34,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 00:20:34,320 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 00:20:34,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 00:20:34,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 00:20:34,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 00:20:34,333 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 00:20:34,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... [2018-12-09 00:20:34,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 00:20:34,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 00:20:34,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 00:20:34,345 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 00:20:34,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:34,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 00:20:34,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 00:20:34,408 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-12-09 00:20:34,409 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-12-09 00:20:34,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 00:20:34,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 00:20:34,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 00:20:34,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 00:20:34,504 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 00:20:34,504 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 00:20:34,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:34 BoogieIcfgContainer [2018-12-09 00:20:34,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 00:20:34,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 00:20:34,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 00:20:34,507 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 00:20:34,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:20:34" (1/3) ... [2018-12-09 00:20:34,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9204190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:34, skipping insertion in model container [2018-12-09 00:20:34,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:34" (2/3) ... [2018-12-09 00:20:34,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9204190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:34, skipping insertion in model container [2018-12-09 00:20:34,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:34" (3/3) ... [2018-12-09 00:20:34,509 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-12-09 00:20:34,515 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 00:20:34,520 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 00:20:34,530 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 00:20:34,546 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 00:20:34,547 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 00:20:34,547 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 00:20:34,547 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 00:20:34,547 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 00:20:34,547 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 00:20:34,547 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 00:20:34,548 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 00:20:34,548 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 00:20:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-12-09 00:20:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 00:20:34,566 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:34,566 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:34,568 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:34,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2018-12-09 00:20:34,573 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:20:34,574 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:34,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:20:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:20:34,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:20:34,697 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 00:20:34,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:20:34,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 00:20:34,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 00:20:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 00:20:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-09 00:20:34,713 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2018-12-09 00:20:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:20:34,796 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-12-09 00:20:34,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 00:20:34,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-12-09 00:20:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:20:34,804 INFO L225 Difference]: With dead ends: 35 [2018-12-09 00:20:34,804 INFO L226 Difference]: Without dead ends: 19 [2018-12-09 00:20:34,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-09 00:20:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-09 00:20:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-09 00:20:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-09 00:20:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-12-09 00:20:34,831 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-12-09 00:20:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:20:34,831 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-12-09 00:20:34,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 00:20:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-12-09 00:20:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-09 00:20:34,832 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:34,833 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:34,833 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:34,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2018-12-09 00:20:34,833 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:20:34,833 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:34,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:20:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:20:34,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 00:20:34,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 00:20:35,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:20:35,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:35,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:20:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:20:35,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 00:20:35,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 00:20:35,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:20:35,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 16 [2018-12-09 00:20:35,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 00:20:35,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 00:20:35,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-12-09 00:20:35,516 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-12-09 00:20:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:20:35,811 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-12-09 00:20:35,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 00:20:35,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2018-12-09 00:20:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:20:35,813 INFO L225 Difference]: With dead ends: 31 [2018-12-09 00:20:35,813 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 00:20:35,814 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2018-12-09 00:20:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 00:20:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-09 00:20:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 00:20:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-09 00:20:35,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-12-09 00:20:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:20:35,817 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-09 00:20:35,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 00:20:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-09 00:20:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 00:20:35,818 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:35,818 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:35,818 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:35,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 2 times [2018-12-09 00:20:35,819 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:20:35,819 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:35,831 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 00:20:35,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:20:35,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:35,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 00:20:35,987 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 00:20:36,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:20:36,932 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:36,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 00:20:36,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:20:36,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:36,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 00:20:36,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 00:20:37,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:20:37,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13, 15] total 26 [2018-12-09 00:20:37,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-09 00:20:37,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-09 00:20:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2018-12-09 00:20:37,343 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-12-09 00:20:37,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:20:37,950 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-12-09 00:20:37,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-09 00:20:37,951 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 32 [2018-12-09 00:20:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:20:37,952 INFO L225 Difference]: With dead ends: 37 [2018-12-09 00:20:37,952 INFO L226 Difference]: Without dead ends: 31 [2018-12-09 00:20:37,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2018-12-09 00:20:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-09 00:20:37,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-09 00:20:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-09 00:20:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-12-09 00:20:37,958 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 32 [2018-12-09 00:20:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:20:37,958 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-12-09 00:20:37,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-09 00:20:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-12-09 00:20:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 00:20:37,959 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:37,959 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:37,960 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:37,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:37,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 3 times [2018-12-09 00:20:37,960 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:20:37,960 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/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 [2018-12-09 00:20:37,979 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-09 00:20:38,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 00:20:38,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:38,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 00:20:38,178 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 00:20:40,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:20:40,584 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:20:40,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 00:20:40,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 00:20:40,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:40,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-09 00:20:40,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 00:20:41,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:20:41,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 18, 21] total 37 [2018-12-09 00:20:41,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-09 00:20:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-09 00:20:41,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2018-12-09 00:20:41,402 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 37 states. [2018-12-09 00:20:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:20:42,267 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-12-09 00:20:42,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-09 00:20:42,268 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2018-12-09 00:20:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:20:42,269 INFO L225 Difference]: With dead ends: 43 [2018-12-09 00:20:42,269 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 00:20:42,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=310, Invalid=2342, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 00:20:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 00:20:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-12-09 00:20:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 00:20:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-12-09 00:20:42,275 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 44 [2018-12-09 00:20:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:20:42,275 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-12-09 00:20:42,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-09 00:20:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-12-09 00:20:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 00:20:42,276 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:42,277 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:42,277 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:42,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 4 times [2018-12-09 00:20:42,277 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:20:42,277 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:20:42,290 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 00:20:42,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 00:20:42,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:42,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-09 00:20:42,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-12-09 00:20:45,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:20:45,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:20:45,497 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 00:20:45,523 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 00:20:45,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:45,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-09 00:20:45,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-12-09 00:20:46,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:20:46,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 21, 27] total 46 [2018-12-09 00:20:46,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-09 00:20:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-09 00:20:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2018-12-09 00:20:46,760 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 46 states. [2018-12-09 00:20:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:20:48,130 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-12-09 00:20:48,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-09 00:20:48,131 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 56 [2018-12-09 00:20:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:20:48,131 INFO L225 Difference]: With dead ends: 49 [2018-12-09 00:20:48,131 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 00:20:48,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 162 SyntacticMatches, 16 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2018-12-09 00:20:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 00:20:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-09 00:20:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-09 00:20:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-12-09 00:20:48,136 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 56 [2018-12-09 00:20:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:20:48,136 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-12-09 00:20:48,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-09 00:20:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-12-09 00:20:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-09 00:20:48,137 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:48,137 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:48,137 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:48,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 5 times [2018-12-09 00:20:48,137 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:20:48,137 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:20:48,150 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-09 00:20:48,193 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-12-09 00:20:48,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:48,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-09 00:20:48,478 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-09 00:20:52,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:20:52,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:20:52,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-09 00:20:52,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-12-09 00:20:52,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:52,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-09 00:20:52,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:20:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-09 00:20:53,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:20:53,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 25, 33] total 56 [2018-12-09 00:20:53,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-09 00:20:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-09 00:20:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2018-12-09 00:20:53,738 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 56 states. [2018-12-09 00:20:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:20:55,378 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-12-09 00:20:55,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-09 00:20:55,379 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-12-09 00:20:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:20:55,380 INFO L225 Difference]: With dead ends: 55 [2018-12-09 00:20:55,380 INFO L226 Difference]: Without dead ends: 49 [2018-12-09 00:20:55,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 206 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2018-12-09 00:20:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-09 00:20:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-12-09 00:20:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-09 00:20:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-12-09 00:20:55,385 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 68 [2018-12-09 00:20:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:20:55,385 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-12-09 00:20:55,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-09 00:20:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-12-09 00:20:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-09 00:20:55,385 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:20:55,385 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:20:55,386 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:20:55,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:20:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 6 times [2018-12-09 00:20:55,386 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:20:55,386 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:20:55,399 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-12-09 00:20:55,454 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-12-09 00:20:55,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:20:55,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:20:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-09 00:20:55,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:21:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-12-09 00:21:00,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:21:00,817 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:21:00,823 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-09 00:21:00,867 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-12-09 00:21:00,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:21:00,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:21:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-09 00:21:00,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:21:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-12-09 00:21:04,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:21:04,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39, 29, 39] total 66 [2018-12-09 00:21:04,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-09 00:21:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-09 00:21:04,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2018-12-09 00:21:04,752 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 66 states. [2018-12-09 00:21:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:21:06,679 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-12-09 00:21:06,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-09 00:21:06,680 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 80 [2018-12-09 00:21:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:21:06,681 INFO L225 Difference]: With dead ends: 61 [2018-12-09 00:21:06,681 INFO L226 Difference]: Without dead ends: 55 [2018-12-09 00:21:06,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 247 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2018-12-09 00:21:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-09 00:21:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-09 00:21:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 00:21:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-12-09 00:21:06,688 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 80 [2018-12-09 00:21:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:21:06,688 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-12-09 00:21:06,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-09 00:21:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-12-09 00:21:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-09 00:21:06,689 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:21:06,689 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:21:06,689 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:21:06,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:21:06,690 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 7 times [2018-12-09 00:21:06,690 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:21:06,690 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:21:06,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:21:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:21:06,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:21:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-09 00:21:07,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:21:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-12-09 00:21:15,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:21:15,342 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:21:15,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:21:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:21:15,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:21:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-09 00:21:15,381 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:21:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-12-09 00:21:19,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:21:19,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45, 33, 45] total 76 [2018-12-09 00:21:19,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-09 00:21:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-09 00:21:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2018-12-09 00:21:19,963 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 76 states. [2018-12-09 00:21:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:21:23,198 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-12-09 00:21:23,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-09 00:21:23,199 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 92 [2018-12-09 00:21:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:21:23,200 INFO L225 Difference]: With dead ends: 67 [2018-12-09 00:21:23,200 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 00:21:23,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 285 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2018-12-09 00:21:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 00:21:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-09 00:21:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 00:21:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-12-09 00:21:23,206 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 92 [2018-12-09 00:21:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:21:23,206 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-12-09 00:21:23,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-09 00:21:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-12-09 00:21:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-12-09 00:21:23,207 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:21:23,207 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:21:23,207 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:21:23,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:21:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 8 times [2018-12-09 00:21:23,208 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:21:23,208 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:21:23,222 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 00:21:23,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:21:23,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:21:23,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:21:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-09 00:21:23,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:21:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-12-09 00:21:33,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:21:33,439 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:21:33,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 00:21:33,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:21:33,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:21:33,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:21:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-09 00:21:33,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:21:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-12-09 00:21:39,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:21:39,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51, 37, 51] total 86 [2018-12-09 00:21:39,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-09 00:21:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-09 00:21:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2018-12-09 00:21:39,146 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 86 states. [2018-12-09 00:21:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:21:44,981 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2018-12-09 00:21:44,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-09 00:21:44,981 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 104 [2018-12-09 00:21:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:21:44,982 INFO L225 Difference]: With dead ends: 73 [2018-12-09 00:21:44,982 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 00:21:44,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 323 SyntacticMatches, 7 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2018-12-09 00:21:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 00:21:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-09 00:21:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 00:21:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-12-09 00:21:44,987 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 104 [2018-12-09 00:21:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:21:44,987 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-12-09 00:21:44,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-09 00:21:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-12-09 00:21:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-12-09 00:21:44,988 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:21:44,988 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:21:44,988 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:21:44,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:21:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 9 times [2018-12-09 00:21:44,989 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:21:44,989 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:21:45,002 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-09 00:21:45,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-09 00:21:45,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:21:45,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:21:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2018-12-09 00:21:45,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:21:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-12-09 00:21:57,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:21:57,937 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:21:57,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 00:21:58,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-09 00:21:58,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:21:58,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:21:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 2 proven. 456 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2018-12-09 00:21:58,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:22:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-12-09 00:22:03,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:22:03,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 57, 42, 57] total 97 [2018-12-09 00:22:03,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-12-09 00:22:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-12-09 00:22:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=8944, Unknown=0, NotChecked=0, Total=9312 [2018-12-09 00:22:03,157 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 97 states. [2018-12-09 00:22:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:22:07,250 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-12-09 00:22:07,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-09 00:22:07,251 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 116 [2018-12-09 00:22:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:22:07,251 INFO L225 Difference]: With dead ends: 79 [2018-12-09 00:22:07,251 INFO L226 Difference]: Without dead ends: 73 [2018-12-09 00:22:07,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 357 SyntacticMatches, 10 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1330, Invalid=17030, Unknown=0, NotChecked=0, Total=18360 [2018-12-09 00:22:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-09 00:22:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-12-09 00:22:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-09 00:22:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-12-09 00:22:07,256 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 116 [2018-12-09 00:22:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:22:07,256 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-12-09 00:22:07,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-12-09 00:22:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-12-09 00:22:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-09 00:22:07,257 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:22:07,257 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:07,257 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:22:07,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 10 times [2018-12-09 00:22:07,257 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:22:07,257 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:22:07,270 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 00:22:07,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 00:22:07,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:22:07,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-09 00:22:08,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:22:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-12-09 00:22:20,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:22:20,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:22:20,868 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 00:22:20,892 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 00:22:20,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:22:20,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-09 00:22:20,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:22:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-12-09 00:22:28,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:22:28,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63, 45, 63] total 106 [2018-12-09 00:22:28,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-12-09 00:22:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-12-09 00:22:28,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2018-12-09 00:22:28,469 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 106 states. [2018-12-09 00:22:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:22:33,740 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2018-12-09 00:22:33,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-09 00:22:33,740 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 128 [2018-12-09 00:22:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:22:33,741 INFO L225 Difference]: With dead ends: 85 [2018-12-09 00:22:33,741 INFO L226 Difference]: Without dead ends: 79 [2018-12-09 00:22:33,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 399 SyntacticMatches, 7 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2018-12-09 00:22:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-09 00:22:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-12-09 00:22:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-09 00:22:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-12-09 00:22:33,746 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 128 [2018-12-09 00:22:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:22:33,746 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-12-09 00:22:33,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-12-09 00:22:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-12-09 00:22:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-12-09 00:22:33,747 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:22:33,747 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:33,747 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:22:33,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 11 times [2018-12-09 00:22:33,747 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:22:33,747 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:22:33,766 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-09 00:22:33,866 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-12-09 00:22:33,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:22:33,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-09 00:22:34,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:22:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-12-09 00:22:53,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:22:53,346 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:22:53,352 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-09 00:22:53,426 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-12-09 00:22:53,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:22:53,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-09 00:22:53,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:23:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-12-09 00:23:01,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:23:01,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69, 49, 69] total 116 [2018-12-09 00:23:01,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-09 00:23:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-09 00:23:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2018-12-09 00:23:01,234 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 116 states. [2018-12-09 00:23:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:23:06,453 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-12-09 00:23:06,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-09 00:23:06,454 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 140 [2018-12-09 00:23:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:23:06,454 INFO L225 Difference]: With dead ends: 91 [2018-12-09 00:23:06,455 INFO L226 Difference]: Without dead ends: 85 [2018-12-09 00:23:06,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 437 SyntacticMatches, 7 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3544 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2018-12-09 00:23:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-09 00:23:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-12-09 00:23:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-12-09 00:23:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-12-09 00:23:06,459 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 140 [2018-12-09 00:23:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:23:06,459 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-12-09 00:23:06,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-09 00:23:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-12-09 00:23:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-12-09 00:23:06,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:23:06,460 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:23:06,460 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:23:06,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:23:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 12 times [2018-12-09 00:23:06,460 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:23:06,460 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:23:06,473 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-12-09 00:23:06,592 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-12-09 00:23:06,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:23:06,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:23:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-12-09 00:23:07,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:23:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-12-09 00:23:27,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:23:27,956 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:23:27,962 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-09 00:23:28,092 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-12-09 00:23:28,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:23:28,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:23:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-12-09 00:23:28,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:23:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-12-09 00:23:39,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:23:39,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 75, 54, 75] total 127 [2018-12-09 00:23:39,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-12-09 00:23:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-12-09 00:23:39,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=15514, Unknown=0, NotChecked=0, Total=16002 [2018-12-09 00:23:39,707 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 127 states. [2018-12-09 00:23:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:23:50,622 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-12-09 00:23:50,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-09 00:23:50,623 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 152 [2018-12-09 00:23:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:23:50,623 INFO L225 Difference]: With dead ends: 97 [2018-12-09 00:23:50,623 INFO L226 Difference]: Without dead ends: 91 [2018-12-09 00:23:50,624 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 472 SyntacticMatches, 9 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4478 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=2056, Invalid=29450, Unknown=0, NotChecked=0, Total=31506 [2018-12-09 00:23:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-09 00:23:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-12-09 00:23:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-09 00:23:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-12-09 00:23:50,627 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 152 [2018-12-09 00:23:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:23:50,627 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-12-09 00:23:50,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-12-09 00:23:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-12-09 00:23:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-12-09 00:23:50,628 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:23:50,628 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:23:50,628 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:23:50,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:23:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1476164169, now seen corresponding path program 13 times [2018-12-09 00:23:50,629 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:23:50,629 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:23:50,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:23:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:23:50,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:23:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-12-09 00:23:52,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:24:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-12-09 00:24:15,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:24:15,388 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:24:15,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:24:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:24:15,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:24:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-12-09 00:24:15,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:24:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-12-09 00:24:27,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:24:27,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81, 57, 81] total 136 [2018-12-09 00:24:27,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-09 00:24:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-09 00:24:27,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2018-12-09 00:24:27,046 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 136 states. [2018-12-09 00:24:33,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:24:33,790 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-12-09 00:24:33,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-09 00:24:33,791 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 164 [2018-12-09 00:24:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:24:33,792 INFO L225 Difference]: With dead ends: 103 [2018-12-09 00:24:33,792 INFO L226 Difference]: Without dead ends: 97 [2018-12-09 00:24:33,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 513 SyntacticMatches, 7 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2018-12-09 00:24:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-09 00:24:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-12-09 00:24:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-09 00:24:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-12-09 00:24:33,798 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 164 [2018-12-09 00:24:33,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:24:33,798 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-12-09 00:24:33,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-09 00:24:33,798 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-12-09 00:24:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-12-09 00:24:33,799 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:24:33,799 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:24:33,799 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:24:33,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:24:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1012642487, now seen corresponding path program 14 times [2018-12-09 00:24:33,800 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:24:33,800 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:24:33,817 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 00:24:33,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:24:33,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:24:33,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:24:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-12-09 00:24:35,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:25:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-12-09 00:25:00,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:25:00,070 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:25:00,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 00:25:00,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:25:00,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:25:00,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:25:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-12-09 00:25:00,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:25:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-12-09 00:25:16,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:25:16,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87, 61, 87] total 146 [2018-12-09 00:25:16,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-12-09 00:25:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-12-09 00:25:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2018-12-09 00:25:16,139 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 146 states. [2018-12-09 00:25:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:25:28,267 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2018-12-09 00:25:28,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-09 00:25:28,267 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 176 [2018-12-09 00:25:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:25:28,268 INFO L225 Difference]: With dead ends: 109 [2018-12-09 00:25:28,268 INFO L226 Difference]: Without dead ends: 103 [2018-12-09 00:25:28,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 551 SyntacticMatches, 7 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5599 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2018-12-09 00:25:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-09 00:25:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-12-09 00:25:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-12-09 00:25:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-12-09 00:25:28,272 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 176 [2018-12-09 00:25:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:25:28,272 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-12-09 00:25:28,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-12-09 00:25:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-12-09 00:25:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-09 00:25:28,273 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:25:28,273 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:25:28,273 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:25:28,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:25:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1282461769, now seen corresponding path program 15 times [2018-12-09 00:25:28,273 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:25:28,274 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 31 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:25:28,286 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-09 00:25:28,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-09 00:25:28,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:25:28,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:25:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-12-09 00:25:30,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:25:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-12-09 00:25:59,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:25:59,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:25:59,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 00:25:59,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-09 00:25:59,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:25:59,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:26:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1330 refuted. 0 times theorem prover too weak. 1222 trivial. 0 not checked. [2018-12-09 00:26:00,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:26:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-12-09 00:26:14,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 00:26:14,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93, 66, 93] total 157 [2018-12-09 00:26:14,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-12-09 00:26:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-12-09 00:26:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=23884, Unknown=0, NotChecked=0, Total=24492 [2018-12-09 00:26:14,816 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 157 states. [2018-12-09 00:26:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:26:30,146 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-12-09 00:26:30,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-12-09 00:26:30,147 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 188 [2018-12-09 00:26:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:26:30,148 INFO L225 Difference]: With dead ends: 115 [2018-12-09 00:26:30,148 INFO L226 Difference]: Without dead ends: 109 [2018-12-09 00:26:30,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 584 SyntacticMatches, 11 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6887 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=2926, Invalid=45254, Unknown=0, NotChecked=0, Total=48180 [2018-12-09 00:26:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-12-09 00:26:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-12-09 00:26:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-09 00:26:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-12-09 00:26:30,153 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 188 [2018-12-09 00:26:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:26:30,153 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-12-09 00:26:30,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-12-09 00:26:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-12-09 00:26:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-12-09 00:26:30,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:26:30,154 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:26:30,154 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 00:26:30,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:26:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1053424823, now seen corresponding path program 16 times [2018-12-09 00:26:30,155 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 00:26:30,155 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/cvc4 Starting monitored process 33 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 00:26:30,171 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 00:26:30,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 00:26:30,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-12-09 00:26:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:26:30,553 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 00:26:30,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:26:30 BoogieIcfgContainer [2018-12-09 00:26:30,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 00:26:30,580 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 00:26:30,580 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 00:26:30,580 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 00:26:30,581 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:34" (3/4) ... [2018-12-09 00:26:30,582 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 00:26:30,630 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b4105352-2670-435a-9563-8b834a3bc698/bin-2019/utaipan/witness.graphml [2018-12-09 00:26:30,630 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 00:26:30,631 INFO L168 Benchmark]: Toolchain (without parser) took 356438.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 943.4 MB in the beginning and 830.9 MB in the end (delta: 112.5 MB). Peak memory consumption was 246.7 MB. Max. memory is 11.5 GB. [2018-12-09 00:26:30,632 INFO L168 Benchmark]: CDTParser took 0.12 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. [2018-12-09 00:26:30,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.53 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. [2018-12-09 00:26:30,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.79 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:26:30,632 INFO L168 Benchmark]: Boogie Preprocessor took 12.35 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:26:30,633 INFO L168 Benchmark]: RCFGBuilder took 159.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -169.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-09 00:26:30,633 INFO L168 Benchmark]: TraceAbstraction took 356075.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.1 MB). Free memory was 1.1 GB in the beginning and 837.5 MB in the end (delta: 264.7 MB). Peak memory consumption was 267.8 MB. Max. memory is 11.5 GB. [2018-12-09 00:26:30,633 INFO L168 Benchmark]: Witness Printer took 49.92 ms. Allocated memory is still 1.2 GB. Free memory was 837.5 MB in the beginning and 830.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2018-12-09 00:26:30,635 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 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 125.53 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 12.79 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.35 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 159.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -169.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 356075.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.1 MB). Free memory was 1.1 GB in the beginning and 837.5 MB in the end (delta: 264.7 MB). Peak memory consumption was 267.8 MB. Max. memory is 11.5 GB. * Witness Printer took 49.92 ms. Allocated memory is still 1.2 GB. Free memory was 837.5 MB in the beginning and 830.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 34]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) VAL [n=32] [L29] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L17] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L17] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L17] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L17] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L17] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L17] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L17] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L17] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L17] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L17] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L17] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L17] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L17] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L17] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L17] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L17] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L17] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L17] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L17] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L17] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L17] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L17] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L17] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L17] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L17] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L17] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L17] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L17] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] return 1; VAL [\old(n)=1, \result=1, n=1] [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L20] return 2 * (hanoi(n-1)) + 1; [L29] RET, EXPR hanoi(n) VAL [hanoi(n)=-1, n=32] [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1<