./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/aiob_4_true-unreach-call.c.v+lh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/aiob_4_true-unreach-call.c.v+lh-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/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 c08ad01fb17039d4f6c07f5a5bde8b7195d83520 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 09:39:07,085 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 09:39:07,086 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 09:39:07,093 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 09:39:07,093 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 09:39:07,094 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 09:39:07,095 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 09:39:07,096 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 09:39:07,097 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 09:39:07,098 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 09:39:07,098 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 09:39:07,098 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 09:39:07,099 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 09:39:07,100 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 09:39:07,100 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 09:39:07,101 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 09:39:07,102 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 09:39:07,103 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 09:39:07,104 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 09:39:07,105 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 09:39:07,106 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 09:39:07,107 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 09:39:07,108 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 09:39:07,109 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 09:39:07,109 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 09:39:07,110 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 09:39:07,110 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 09:39:07,111 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 09:39:07,112 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 09:39:07,112 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 09:39:07,113 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 09:39:07,113 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 09:39:07,113 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 09:39:07,113 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 09:39:07,114 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 09:39:07,115 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 09:39:07,115 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 09:39:07,124 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 09:39:07,124 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 09:39:07,125 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 09:39:07,125 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 09:39:07,125 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 09:39:07,125 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 09:39:07,125 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 09:39:07,125 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 09:39:07,126 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 09:39:07,126 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 09:39:07,126 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 09:39:07,126 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 09:39:07,126 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 09:39:07,127 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 09:39:07,127 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 09:39:07,127 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 09:39:07,127 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 09:39:07,127 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 09:39:07,127 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 09:39:07,128 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 09:39:07,128 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 09:39:07,128 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 09:39:07,128 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 09:39:07,128 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 09:39:07,128 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 09:39:07,128 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 09:39:07,129 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 09:39:07,129 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 09:39:07,129 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 09:39:07,129 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 09:39:07,129 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 09:39:07,129 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 09:39:07,130 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 09:39:07,130 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 09:39:07,130 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 09:39:07,130 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 09:39:07,130 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 09:39:07,130 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_f3401df9-6dad-46da-b2f7-c70f830258ff/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 -> c08ad01fb17039d4f6c07f5a5bde8b7195d83520 [2018-11-23 09:39:07,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 09:39:07,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 09:39:07,169 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 09:39:07,170 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 09:39:07,171 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 09:39:07,171 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/../../sv-benchmarks/c/loop-industry-pattern/aiob_4_true-unreach-call.c.v+lh-reducer.c [2018-11-23 09:39:07,216 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/data/be51f3a7c/e0a881fe7bfe4811ab7f1afe68f48722/FLAG211bd0183 [2018-11-23 09:39:07,658 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 09:39:07,658 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/sv-benchmarks/c/loop-industry-pattern/aiob_4_true-unreach-call.c.v+lh-reducer.c [2018-11-23 09:39:07,664 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/data/be51f3a7c/e0a881fe7bfe4811ab7f1afe68f48722/FLAG211bd0183 [2018-11-23 09:39:07,673 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/data/be51f3a7c/e0a881fe7bfe4811ab7f1afe68f48722 [2018-11-23 09:39:07,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 09:39:07,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 09:39:07,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 09:39:07,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 09:39:07,679 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 09:39:07,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:39:07" (1/1) ... [2018-11-23 09:39:07,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16069910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07, skipping insertion in model container [2018-11-23 09:39:07,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:39:07" (1/1) ... [2018-11-23 09:39:07,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 09:39:07,707 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 09:39:07,901 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:39:07,910 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 09:39:08,013 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:39:08,030 INFO L195 MainTranslator]: Completed translation [2018-11-23 09:39:08,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08 WrapperNode [2018-11-23 09:39:08,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 09:39:08,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 09:39:08,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 09:39:08,032 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 09:39:08,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 09:39:08,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 09:39:08,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 09:39:08,060 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 09:39:08,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... [2018-11-23 09:39:08,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 09:39:08,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 09:39:08,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 09:39:08,096 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 09:39:08,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 09:39:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-23 09:39:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2018-11-23 09:39:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 09:39:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 09:39:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2018-11-23 09:39:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 09:39:08,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 09:39:08,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-23 09:39:08,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 09:39:08,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 09:39:08,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-23 09:39:08,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-23 09:39:08,552 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 09:39:08,552 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 09:39:08,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:39:08 BoogieIcfgContainer [2018-11-23 09:39:08,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 09:39:08,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 09:39:08,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 09:39:08,556 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 09:39:08,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:39:07" (1/3) ... [2018-11-23 09:39:08,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeb31e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:39:08, skipping insertion in model container [2018-11-23 09:39:08,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:08" (2/3) ... [2018-11-23 09:39:08,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeb31e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:39:08, skipping insertion in model container [2018-11-23 09:39:08,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:39:08" (3/3) ... [2018-11-23 09:39:08,559 INFO L112 eAbstractionObserver]: Analyzing ICFG aiob_4_true-unreach-call.c.v+lh-reducer.c [2018-11-23 09:39:08,568 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 09:39:08,575 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 09:39:08,588 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 09:39:08,609 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 09:39:08,609 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 09:39:08,609 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 09:39:08,609 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 09:39:08,609 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 09:39:08,610 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 09:39:08,610 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 09:39:08,610 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 09:39:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-23 09:39:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-23 09:39:08,625 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:39:08,626 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:39:08,628 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:39:08,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:39:08,633 INFO L82 PathProgramCache]: Analyzing trace with hash -376112144, now seen corresponding path program 1 times [2018-11-23 09:39:08,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 09:39:08,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:08,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:39:08,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:08,672 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 09:39:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:08,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 09:39:08,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 09:39:08,902 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 09:39:08,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 09:39:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 09:39:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 09:39:08,918 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2018-11-23 09:39:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:39:08,980 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2018-11-23 09:39:08,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 09:39:08,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-11-23 09:39:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:39:08,993 INFO L225 Difference]: With dead ends: 38 [2018-11-23 09:39:08,993 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 09:39:08,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-23 09:39:09,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 09:39:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-11-23 09:39:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-23 09:39:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-23 09:39:09,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2018-11-23 09:39:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:39:09,024 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-23 09:39:09,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 09:39:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-23 09:39:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 09:39:09,025 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:39:09,025 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:39:09,025 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:39:09,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:39:09,026 INFO L82 PathProgramCache]: Analyzing trace with hash -425262959, now seen corresponding path program 1 times [2018-11-23 09:39:09,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 09:39:09,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:09,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:39:09,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:09,027 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 09:39:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:09,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:09,261 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 09:39:09,262 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-23 09:39:09,264 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [14], [17], [21], [24], [27], [30], [31], [36], [37], [38] [2018-11-23 09:39:09,298 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 09:39:09,299 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 09:39:09,661 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 09:39:09,663 INFO L272 AbstractInterpreter]: Visited 15 different actions 22 times. Merged at 5 different actions 6 times. Never widened. Performed 572 root evaluator evaluations with a maximum evaluation depth of 6. Performed 572 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 199 variables. [2018-11-23 09:39:09,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:39:09,675 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 09:39:09,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:09,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:39:09,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:39:09,689 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 09:39:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:09,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:39:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:09,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 09:39:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:09,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 09:39:09,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-23 09:39:09,915 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 09:39:09,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 09:39:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 09:39:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-23 09:39:09,917 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-11-23 09:39:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:39:10,034 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-11-23 09:39:10,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 09:39:10,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-23 09:39:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:39:10,036 INFO L225 Difference]: With dead ends: 29 [2018-11-23 09:39:10,036 INFO L226 Difference]: Without dead ends: 26 [2018-11-23 09:39:10,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-11-23 09:39:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-23 09:39:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-11-23 09:39:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 09:39:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-23 09:39:10,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2018-11-23 09:39:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:39:10,043 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-23 09:39:10,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 09:39:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-23 09:39:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-23 09:39:10,044 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:39:10,044 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:39:10,045 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:39:10,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:39:10,045 INFO L82 PathProgramCache]: Analyzing trace with hash 720615568, now seen corresponding path program 2 times [2018-11-23 09:39:10,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 09:39:10,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:10,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:39:10,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:10,047 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 09:39:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:10,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:10,276 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 09:39:10,276 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 09:39:10,276 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 09:39:10,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:10,276 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:39:10,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 09:39:10,285 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 09:39:10,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 09:39:10,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:39:10,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:39:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:10,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 09:39:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:10,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 09:39:10,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-11-23 09:39:10,464 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 09:39:10,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 09:39:10,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 09:39:10,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-23 09:39:10,465 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-11-23 09:39:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:39:10,581 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-23 09:39:10,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 09:39:10,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-11-23 09:39:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:39:10,583 INFO L225 Difference]: With dead ends: 34 [2018-11-23 09:39:10,584 INFO L226 Difference]: Without dead ends: 31 [2018-11-23 09:39:10,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-11-23 09:39:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-23 09:39:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-11-23 09:39:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 09:39:10,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-23 09:39:10,587 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2018-11-23 09:39:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:39:10,587 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-23 09:39:10,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 09:39:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-23 09:39:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 09:39:10,588 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:39:10,588 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:39:10,588 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:39:10,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:39:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1339742223, now seen corresponding path program 3 times [2018-11-23 09:39:10,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 09:39:10,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:10,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:39:10,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:10,590 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 09:39:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:10,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:10,702 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 09:39:10,702 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 09:39:10,702 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 09:39:10,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:10,702 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:39:10,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 09:39:10,709 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 09:39:10,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 09:39:10,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:39:10,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:39:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:10,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 09:39:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:10,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 09:39:10,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-23 09:39:10,898 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 09:39:10,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 09:39:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 09:39:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-11-23 09:39:10,898 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2018-11-23 09:39:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:39:11,012 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-11-23 09:39:11,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 09:39:11,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-11-23 09:39:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:39:11,013 INFO L225 Difference]: With dead ends: 39 [2018-11-23 09:39:11,013 INFO L226 Difference]: Without dead ends: 36 [2018-11-23 09:39:11,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-11-23 09:39:11,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-23 09:39:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-23 09:39:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-23 09:39:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-11-23 09:39:11,016 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2018-11-23 09:39:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:39:11,017 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-11-23 09:39:11,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 09:39:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-11-23 09:39:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-23 09:39:11,018 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:39:11,018 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:39:11,018 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:39:11,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:39:11,018 INFO L82 PathProgramCache]: Analyzing trace with hash -788058832, now seen corresponding path program 4 times [2018-11-23 09:39:11,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 09:39:11,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:11,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:39:11,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:11,019 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 09:39:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:11,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:11,150 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 09:39:11,150 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 09:39:11,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 09:39:11,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:11,151 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:39:11,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:39:11,168 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 09:39:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:11,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:39:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:11,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 09:39:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:11,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 09:39:11,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-23 09:39:11,414 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 09:39:11,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 09:39:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 09:39:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-11-23 09:39:11,414 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2018-11-23 09:39:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:39:11,602 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-11-23 09:39:11,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 09:39:11,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-11-23 09:39:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:39:11,603 INFO L225 Difference]: With dead ends: 44 [2018-11-23 09:39:11,603 INFO L226 Difference]: Without dead ends: 41 [2018-11-23 09:39:11,603 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2018-11-23 09:39:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-23 09:39:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-11-23 09:39:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-23 09:39:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-23 09:39:11,607 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-11-23 09:39:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:39:11,607 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-23 09:39:11,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 09:39:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-23 09:39:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-23 09:39:11,608 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:39:11,608 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:39:11,608 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:39:11,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:39:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash -517892271, now seen corresponding path program 5 times [2018-11-23 09:39:11,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 09:39:11,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:11,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:39:11,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:39:11,609 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 09:39:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:39:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:39:11,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:11,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 09:39:11,715 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 09:39:11,715 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 09:39:11,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:39:11,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:39:11,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 09:39:11,727 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 09:39:11,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 09:39:11,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:39:11,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:39:12,024 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-11-23 09:39:12,025 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-23 09:39:12,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2018-11-23 09:39:12,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 12 [2018-11-23 09:39:12,056 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2018-11-23 09:39:12,066 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-23 09:39:12,085 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-23 09:39:12,085 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:24 [2018-11-23 09:39:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-23 09:39:12,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 09:39:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-23 09:39:12,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 09:39:12,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2018-11-23 09:39:12,451 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 09:39:12,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 09:39:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 09:39:12,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-11-23 09:39:12,452 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2018-11-23 09:39:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:39:13,117 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-11-23 09:39:13,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 09:39:13,117 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2018-11-23 09:39:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:39:13,118 INFO L225 Difference]: With dead ends: 49 [2018-11-23 09:39:13,118 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 09:39:13,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 09:39:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 09:39:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 09:39:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 09:39:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 09:39:13,119 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-11-23 09:39:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:39:13,119 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 09:39:13,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 09:39:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 09:39:13,119 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 09:39:13,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 09:39:13,260 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-23 09:39:13,260 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-23 09:39:13,260 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 09:39:13,260 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 09:39:13,260 INFO L444 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (= ~Id_MCDC_93~0 0) [2018-11-23 09:39:13,261 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point L159(lines 159 234) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point L188(lines 188 206) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 219) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point L219(line 219) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point L217(lines 217 225) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 131 235) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point L180(lines 180 227) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point L178(lines 178 232) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 131 235) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L448 ceAbstractionStarter]: For program point L195(lines 195 205) no Hoare annotation was computed. [2018-11-23 09:39:13,261 INFO L444 ceAbstractionStarter]: At program point mainENTRY(lines 131 235) the Hoare annotation is: (or (not (= 0 |old(~Id_MCDC_93~0)|)) (= ~Id_MCDC_93~0 0)) [2018-11-23 09:39:13,262 INFO L444 ceAbstractionStarter]: At program point L200(lines 165 233) the Hoare annotation is: (let ((.cse0 (= |main_~#Id_MCDC_89__Id_MCDC_95~0.offset| 0)) (.cse1 (= 0 (select (select |#memory_int| |main_~#Id_MCDC_89__Id_MCDC_95~0.base|) (+ |main_~#Id_MCDC_89__Id_MCDC_95~0.offset| 492))))) (or (and (<= main_~Id_MCDC_89__Id_MCDC_96~0 1) .cse0 (<= 1 main_~Id_MCDC_89__Id_MCDC_96~0) .cse1 (< 0 (+ (div ~Id_MCDC_93~0 4294967296) 1)) (<= ~Id_MCDC_93~0 3)) (not (= 0 |old(~Id_MCDC_93~0)|)) (let ((.cse2 (mod (+ ~Id_MCDC_93~0 4294967295) 4294967296)) (.cse3 (mod (+ main_~Id_MCDC_89__Id_MCDC_96~0 4294967295) 4294967296))) (and (< .cse2 42) .cse0 (not (= (* 12 .cse3) 492)) (not (= 492 (* 12 .cse2))) .cse1 (< .cse3 42))) (and .cse0 (= ~Id_MCDC_93~0 0) .cse1 (= 0 main_~Id_MCDC_89__Id_MCDC_96~0)))) [2018-11-23 09:39:13,267 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,267 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,268 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,272 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,273 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,273 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:39:13 BoogieIcfgContainer [2018-11-23 09:39:13,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 09:39:13,275 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 09:39:13,275 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 09:39:13,275 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 09:39:13,276 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:39:08" (3/4) ... [2018-11-23 09:39:13,278 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 09:39:13,283 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 09:39:13,283 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 09:39:13,289 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 80 nodes and edges [2018-11-23 09:39:13,289 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 44 nodes and edges [2018-11-23 09:39:13,290 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2018-11-23 09:39:13,290 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-23 09:39:13,290 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-23 09:39:13,290 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 09:39:13,291 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 09:39:13,315 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((Id_MCDC_89__Id_MCDC_96 <= 1 && Id_MCDC_89__Id_MCDC_95 == 0) && 1 <= Id_MCDC_89__Id_MCDC_96) && 0 == unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492]) && 0 < Id_MCDC_93 / 4294967296 + 1) && Id_MCDC_93 <= 3) || !(0 == \old(Id_MCDC_93))) || ((((((Id_MCDC_93 + 4294967295) % 4294967296 < 42 && Id_MCDC_89__Id_MCDC_95 == 0) && !(12 * ((Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296) == 492)) && !(492 == 12 * ((Id_MCDC_93 + 4294967295) % 4294967296))) && 0 == unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492]) && (Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296 < 42)) || (((Id_MCDC_89__Id_MCDC_95 == 0 && Id_MCDC_93 == 0) && 0 == unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492]) && 0 == Id_MCDC_89__Id_MCDC_96) [2018-11-23 09:39:13,363 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f3401df9-6dad-46da-b2f7-c70f830258ff/bin-2019/utaipan/witness.graphml [2018-11-23 09:39:13,364 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 09:39:13,364 INFO L168 Benchmark]: Toolchain (without parser) took 5688.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 959.2 MB in the beginning and 930.9 MB in the end (delta: 28.4 MB). Peak memory consumption was 214.5 MB. Max. memory is 11.5 GB. [2018-11-23 09:39:13,365 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:39:13,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -163.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 11.5 GB. [2018-11-23 09:39:13,366 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.57 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. [2018-11-23 09:39:13,366 INFO L168 Benchmark]: Boogie Preprocessor took 35.19 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-23 09:39:13,367 INFO L168 Benchmark]: RCFGBuilder took 456.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 85.2 MB). Peak memory consumption was 85.2 MB. Max. memory is 11.5 GB. [2018-11-23 09:39:13,367 INFO L168 Benchmark]: TraceAbstraction took 4721.40 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 57.1 MB). Free memory was 1.0 GB in the beginning and 950.5 MB in the end (delta: 81.9 MB). Peak memory consumption was 139.0 MB. Max. memory is 11.5 GB. [2018-11-23 09:39:13,367 INFO L168 Benchmark]: Witness Printer took 88.60 ms. Allocated memory is still 1.2 GB. Free memory was 950.5 MB in the beginning and 930.9 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-23 09:39:13,369 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 354.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -163.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.19 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 456.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 85.2 MB). Peak memory consumption was 85.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4721.40 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 57.1 MB). Free memory was 1.0 GB in the beginning and 950.5 MB in the end (delta: 81.9 MB). Peak memory consumption was 139.0 MB. Max. memory is 11.5 GB. * Witness Printer took 88.60 ms. Allocated memory is still 1.2 GB. Free memory was 950.5 MB in the beginning and 930.9 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 219]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 165]: Loop Invariant [2018-11-23 09:39:13,372 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,372 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,372 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,373 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,373 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-23 09:39:13,373 WARN L1272 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((((Id_MCDC_89__Id_MCDC_96 <= 1 && Id_MCDC_89__Id_MCDC_95 == 0) && 1 <= Id_MCDC_89__Id_MCDC_96) && 0 == unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492]) && 0 < Id_MCDC_93 / 4294967296 + 1) && Id_MCDC_93 <= 3) || !(0 == \old(Id_MCDC_93))) || ((((((Id_MCDC_93 + 4294967295) % 4294967296 < 42 && Id_MCDC_89__Id_MCDC_95 == 0) && !(12 * ((Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296) == 492)) && !(492 == 12 * ((Id_MCDC_93 + 4294967295) % 4294967296))) && 0 == unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492]) && (Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296 < 42)) || (((Id_MCDC_89__Id_MCDC_95 == 0 && Id_MCDC_93 == 0) && 0 == unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492]) && 0 == Id_MCDC_89__Id_MCDC_96) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. SAFE Result, 4.6s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 70 SDtfs, 175 SDslu, 248 SDs, 0 SdLazy, 612 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 235 SyntacticMatches, 14 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 12 NumberOfFragments, 113 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 362 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 282 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 401 ConstructedInterpolants, 21 QuantifiedInterpolants, 80945 SizeOfPredicates, 20 NumberOfNonLiveVariables, 2249 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 80/435 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...